Physiological Integrity

1960 soru

Soru 221Soru →

A client's recent arterial blood gas (ABG) results are as follows: pH=7.51\text{pH} = 7.51, PaCO2=42 mm Hg\text{PaCO}_2 = 42 \text{ mm Hg}, and HCO3−=33 mEq/L\text{HCO}_3^- = 33 \text{ mEq/L}. Which of the following underlying conditions or treatments are most likely responsible for this acid-base imbalance? Select all that apply.

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Cevap: Prolonged nasogastric tube suctioning; Persistent, severe vomiting

Cevap

Prolonged nasogastric tube suctioning and persistent, severe vomiting.
The provided ABG values demonstrate an elevated pH\text{pH} (>7.45> 7.45) and an elevated bicarbonate (HCO3−\text{HCO}_3^- >26 mEq/L> 26 \text{ mEq/L}) with a normal carbon dioxide level (PaCO2\text{PaCO}_2 35−45 mm Hg35-45 \text{ mm Hg}). This profile defines uncompensated metabolic alkalosis. Metabolic alkalosis is typically caused by a significant loss of body acid or an accumulation of bicarbonate. Prolonged nasogastric suctioning and persistent vomiting deplete the body of hydrochloric acid from the stomach. Therefore, these two conditions correctly explain the ABG findings.

Adım Adım Çözüm

1
Analyze the arterial blood gas (ABG) values.
The pH\text{pH} is 7.517.51 (alkalosis), PaCO2\text{PaCO}_2 is 42 mm Hg42 \text{ mm Hg} (normal), and HCO3−\text{HCO}_3^- is 33 mEq/L33 \text{ mEq/L} (elevated).
Determining the primary acid-base imbalance is necessary to identify the potential underlying causes.
2
Interpret the specific type of acid-base imbalance.
The elevated pH\text{pH} and elevated HCO3−\text{HCO}_3^- with a normal PaCO2\text{PaCO}_2 indicate uncompensated metabolic alkalosis.
Matching the ABG interpretation to clinical scenarios is the core requirement of the question.
3
Evaluate each clinical scenario to see if it causes metabolic alkalosis.
Gastric suctioning and vomiting lead to significant acid loss, which directly causes metabolic alkalosis.
Confirming that the selected options physiologically result in the identified ABG imbalance ensures accuracy.

Anahtar Kavram

Metabolic Alkalosis Causes and ABG Interpretation
Soru 222Soru →

A nurse is analyzing the clinical profile of a client who abruptly developed severe dyspnea, pleuritic chest pain, and a feeling of impending doom. A massive pulmonary embolism is confirmed, and the client is currently exhibiting signs of obstructive shock. Which of the following hemodynamic and laboratory findings are consistent with this physiological decompensation? Select all that apply.

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Cevap: Central venous pressure (CVP) of 16 mm Hg; Arterial blood gas results demonstrating pH 7.52, PaCO2 29 mm Hg, and PaO2 54 mm Hg

Cevap

The findings consistent with obstructive shock secondary to a massive pulmonary embolism are an elevated CVP (16 mm Hg) and respiratory alkalosis with hypoxemia (pH 7.52, PaCO2 29 mm Hg, PaO2 54 mm Hg).
A massive pulmonary embolism creates a sudden mechanical obstruction in the pulmonary vasculature. This dramatically increases pulmonary vascular resistance, causing acute right ventricular failure (cor pulmonale). Consequently, blood backs up into the systemic venous circulation, leading to a significantly elevated Central Venous Pressure (CVP of 16 mm Hg; normal is 2-8 mm Hg). Simultaneously, the severe ventilation-perfusion (V/Q) mismatch causes profound hypoxemia (PaO2 54 mm Hg). In response to the hypoxemia and physiological stress, the client hyperventilates, which blows off excessive carbon dioxide and results in an early respiratory alkalosis (pH 7.52, PaCO2 29 mm Hg).

Adım Adım Çözüm

1
Analyze the pathophysiology of a massive pulmonary embolism (PE).
A large embolus creates a mechanical obstruction in the pulmonary artery, drastically increasing pulmonary vascular resistance.
Understanding the location of the obstruction is required to trace upstream and downstream hemodynamic effects.
2
Evaluate the upstream (right-sided) hemodynamic effects of the obstruction.
The right ventricle dilates and fails against the high resistance (acute cor pulmonale), causing blood to back up into the systemic venous system, resulting in an elevated CVP.
This identifies why central venous pressure rises significantly in obstructive shock.
3
Evaluate the downstream (left-sided) hemodynamic effects of the obstruction.
Because blood cannot pass through the pulmonary circulation, left ventricular preload is severely diminished. Consequently, PAWP remains low or normal, and cardiac output plummets.
This differentiates obstructive shock from cardiogenic shock, where PAWP would be highly elevated.
4
Assess the compensatory mechanisms and gas exchange alterations.
The ventilation-perfusion (V/Q) mismatch causes profound hypoxemia. The client's compensatory tachypnea blows off excessive CO2, producing an early respiratory alkalosis. Sympathetic activation increases SVR.
This correlates the ABG values and systemic vascular resistance findings with the acute disease process.

Anahtar Kavram

Hemodynamic profile and arterial blood gas alterations in obstructive shock secondary to massive pulmonary embolism.
Soru 223Soru →

An emergency department team is treating a client with advanced chronic obstructive pulmonary disease (COPD) who arrived via ambulance due to worsening lethargy and severe dyspnea. The client is currently on a 2 L/min nasal cannula.

Clinical Data:
* Neurological: Somnolent but rousable to verbal stimuli
* Vital Signs: HR 118 bpm, RR 10 breaths/min and shallow, BP 142/86 mm Hg
* Arterial Blood Gas (ABG): pH 7.24, PaCO2 76 mm Hg, PaO2 54 mm Hg, HCO3 33 mEq/L

Based on the clinical presentation and laboratory results, which action is the priority?

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Cevap: Prepare to assist with the initiation of noninvasive positive-pressure ventilation (NIPPV).

Cevap

Prepare to assist with the initiation of noninvasive positive-pressure ventilation (NIPPV).
The client is in acute hypercapnic respiratory failure (CO2 narcosis), evidenced by somnolence, a low respiratory rate (10 breaths/min), and severe respiratory acidosis (pH 7.24, PaCO2 76 mm Hg). Noninvasive positive-pressure ventilation (NIPPV) provides ventilatory support, increasing tidal volume and alveolar ventilation to blow off excess CO2, correct the acidosis, and improve oxygenation without the immediate need for invasive endotracheal intubation.

Adım Adım Çözüm

1
Analyze the Arterial Blood Gas (ABG) values.
pH is 7.24 (acidosis), PaCO2 is 76 mm Hg (severe respiratory acidosis), and PaO2 is 54 mm Hg (severe hypoxemia). HCO3 is 33 mEq/L (partial metabolic compensation).
Accurate ABG interpretation is required to identify the primary acid-base disturbance and the severity of respiratory failure.
2
Correlate ABG findings with the client's clinical presentation.
The client is somnolent with a shallow respiratory rate of 10 breaths/min.
Severe hypercapnia (high PaCO2) causes central nervous system depression (CO2 narcosis), leading to hypoventilation and lethargy.
3
Determine the highest priority intervention based on the ABCs (Airway, Breathing, Circulation).
The client requires immediate mechanical assistance to breathe (ventilation) because they are failing to clear CO2 independently.
NIPPV is the first-line therapy to rapidly improve ventilation, reduce PaCO2, and reverse acute respiratory acidosis in arousable COPD clients before respiratory arrest occurs.

Anahtar Kavram

Management of Acute-on-Chronic Respiratory Acidosis in COPD
Soru 224Soru →

A triage nurse evaluates a client with type 1 diabetes mellitus who presents with a capillary blood glucose of 610 mg/dL, fruity breath odor, and profound lethargy. The client is exhibiting deep, rapid respirations. Arrange the following nursing interventions in the correct chronological order of execution.

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Cevap

The correct priority sequence is: 1) Assess airway patency, 2) Establish large-bore IV access, 3) Administer a bolus of 0.9% sodium chloride, 4) Review the serum potassium level, and 5) Initiate a continuous infusion of regular insulin.
The management of an acute physiological crisis like Diabetic Ketoacidosis strictly follows the ABCs (Airway, Breathing, Circulation) and specific metabolic safety guidelines. Airway is always verified first. Circulation is addressed next by securing IV access and administering isotonic fluids to resolve life-threatening hypovolemia. Finally, before the metabolic issue (hyperglycemia) can be treated with insulin, the nurse must ensure the serum potassium level is known, as insulin profoundly lowers serum potassium.

Adım Adım Çözüm

1
Perform an airway and respiratory assessment.
Ensures adequate oxygenation and ventilation.
Following the ABCs (Airway, Breathing, Circulation), confirming airway patency is always the absolute first priority, particularly given the client's lethargy and abnormal breathing pattern.
2
Insert a large-bore IV catheter.
Provides a reliable route for rapid fluid administration.
Vascular access is a mechanical necessity before any pharmacological or fluid resuscitation can begin for a physiologically unstable client.
3
Infuse 0.9% sodium chloride rapidly.
Expands intravascular volume and improves tissue perfusion.
Clients with Diabetic Ketoacidosis (DKA) experience severe osmotic diuresis. Addressing the resulting hypovolemia takes precedence over correcting the blood glucose level.
4
Check the baseline serum potassium level.
Identifies current electrolyte status to prevent iatrogenic harm.
Insulin administration drives potassium back into the cells. If a client is already hypokalemic, giving insulin first can induce fatal cardiac arrhythmias.
5
Start an IV regular insulin infusion.
Drives glucose into cells and stops ketone production.
Once intravascular volume is being restored and potassium is confirmed safe, insulin is safely administered to resolve the underlying hyperglycemia and acidosis.

Anahtar Kavram

Prioritization of acute interventions in Diabetic Ketoacidosis (DKA) based on ABCs and physiological safety.
Soru 225Soru →

An emergency department nurse is preparing to manage a newly admitted client experiencing diabetic ketoacidosis. The treatment plan includes initiating a continuous intravenous infusion of regular insulin. Which of the following interventions should the nurse include in the client's plan of care? Select all that apply.

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Cevap: Flush the intravenous tubing with 50 mL of the prepared regular insulin solution prior to attaching it to the client; Add 5% dextrose to the intravenous hydration fluids when the client's blood glucose level drops to 250 mg/dL (13.9 mmol/L); Assess the client's capillary blood glucose levels every hour while the continuous insulin infusion is active

Cevap

The correct actions include flushing the intravenous tubing with the insulin solution prior to connection, adding 5% dextrose to fluids when blood glucose reaches 250 mg/dL (13.9 mmol/L), and monitoring capillary blood glucose levels every hour.
Intravenous regular insulin adheres to the inner lining of standard polyvinyl chloride (PVC) tubing. Flushing the tubing with 20 to 50 mL of the insulin solution saturates these binding sites, guaranteeing that the client receives the prescribed concentration. As blood glucose levels decline during treatment and approach 250 mg/dL (13.9 mmol/L), the nurse must add a dextrose source (such as 5% dextrose) to the intravenous fluids. This step prevents a rapid drop in serum osmolality and avoids hypoglycemia, which can trigger cerebral edema. Furthermore, continuous insulin infusions mandate strict monitoring; hourly capillary blood glucose checks are required to safely titrate the infusion based on established protocols.

Adım Adım Çözüm

1
Identify the primary physiological and pharmacological risks associated with continuous regular insulin infusions for diabetic ketoacidosis.
The main risks include rapidly developing hypoglycemia, hypokalemia, and dosing errors due to drug adherence to tubing or incorrect weight estimates.
Understanding the pharmacodynamics of intravenous insulin is essential for safe administration and anticipating complications.
2
Evaluate the options related to preparation and safe administration.
Flushing the tubing saturates binding sites, ensuring accurate dosing. Using the current actual weight is required for high-alert medication dosing, invalidating the use of old or estimated weights. IV compatibility must always be checked.
Insulin adsorbs to PVC tubing, which can result in under-dosing if not properly primed. Incompatible medications can precipitate or alter drug efficacy.
3
Evaluate the options related to monitoring and concurrent fluid therapies.
Hourly blood glucose checks are the standard of care. Adding dextrose when glucose reaches 250 mg/dL (13.9 mmol/L) prevents hypoglycemia. Checking the baseline potassium before starting insulin is mandatory.
Frequent monitoring and proactive fluid adjustments stabilize the client's metabolic state without causing dangerous shifts in glucose or electrolytes.

Anahtar Kavram

Safe administration and continuous monitoring of intravenous regular insulin therapy.
Soru 226Soru →

A nurse is evaluating a client who was brought to the clinic experiencing a severe panic attack. The client has a respiratory rate of 34 breaths per minute and reports tingling in the fingers and lightheadedness. Based on this clinical presentation, which acid-base imbalance should the nurse anticipate?

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Cevap: Respiratory alkalosis

Cevap

Respiratory alkalosis
The correct answer is respiratory alkalosis. During a severe panic attack, a client typically hyperventilates. This rapid breathing causes the body to exhale excessive amounts of carbon dioxide (CO2). Because CO2 acts as an acid in the bloodstream, blowing off too much of it decreases the body's carbonic acid levels, causing the blood pH to rise above 7.45 and leading directly to respiratory alkalosis.

Adım Adım Çözüm

1
Identify the primary physiological mechanism occurring in the client.
The client is hyperventilating (respiratory rate of 34 breaths per minute) due to a panic attack.
Recognizing the underlying physiological change is the first step in identifying the resulting acid-base imbalance.
2
Determine the effect of hyperventilation on carbon dioxide (CO2) levels.
Rapid, deep breathing causes excessive elimination of CO2 from the lungs.
CO2 acts as an acid in the blood. When breathing rate increases, the body "blows off" this acid.
3
Correlate the loss of CO2 to the correct acid-base imbalance.
The significant loss of CO2 decreases blood acidity, raising the pH and causing an alkalotic state of respiratory origin.
Since the origin of the imbalance is the respiratory system's excessive removal of CO2, the condition is respiratory alkalosis.

Anahtar Kavram

Acid-Base Imbalances: Respiratory Alkalosis
Soru 227Soru →

A nurse is managing the care of a client admitted to the intensive care unit with severe diabetic ketoacidosis (DKA). The client's initial blood glucose is 680 mg/dL (37.7 mmol/L), pH is 7.15, and blood pressure is 88/54 mm Hg. Arrange the following nursing interventions in the correct sequence of execution from first to last.

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Cevap

The correct sequence is: fluid resuscitation, potassium evaluation, insulin infusion initiation, addition of dextrose to fluids, and transition to subcutaneous insulin.
In diabetic ketoacidosis, severe osmotic diuresis leads to profound dehydration and potential hypovolemic shock. Therefore, the absolute first priority is fluid resuscitation with isotonic saline to restore perfusion. Once fluids are running, the nurse must ensure the serum potassium is greater than 3.3 mEq/L before giving insulin, as insulin drives potassium back into the cells and can trigger lethal hypokalemia. Following potassium verification, a continuous regular insulin infusion is started to halt ketone production and resolve the acidosis. As the blood glucose falls to around 200-250 mg/dL (11.1-13.9 mmol/L), 5% dextrose is added to the IV fluids to prevent hypoglycemia and cerebral edema while the insulin continues to clear the remaining ketones. Finally, once the acidosis has completely resolved and the client can tolerate oral intake, a transition to subcutaneous insulin is initiated before stopping the IV insulin.

Adım Adım Çözüm

1
Prioritize fluid resuscitation by administering 0.9% sodium chloride.
Intravascular volume is expanded, and blood pressure stabilizes.
Severe dehydration and hypovolemic shock are the most immediate life-threatening complications of the osmotic diuresis caused by DKA.
2
Assess the serum potassium level.
The nurse confirms the potassium is at a safe baseline level.
Insulin administration drives potassium into the intracellular space, which can cause severe hypokalemia and lethal arrhythmias if the baseline level is not adequate.
3
Initiate the continuous regular insulin infusion.
Blood glucose levels begin to steadily decline and ketogenesis is inhibited.
Insulin is required to correct the underlying metabolic acidosis by stopping the breakdown of fats into ketones.
4
Add 5% dextrose to the intravenous fluids once blood glucose reaches approximately 200-250 mg/dL (11.1-13.9 mmol/L).
The blood glucose decline is stabilized while insulin administration continues.
Dextrose prevents a rapid drop in blood glucose, which can lead to life-threatening cerebral edema and hypoglycemia, while allowing the insulin drip to continue clearing ketones.
5
Administer subcutaneous insulin.
The client is prepared for the discontinuation of the intravenous insulin infusion.
Transitioning to subcutaneous insulin occurs when the anion gap closes and the acidosis is resolved, providing basal glycemic control before the IV drip is turned off.

Anahtar Kavram

The physiological stabilization sequence for diabetic ketoacidosis requires treating hypovolemia first, then securing safe electrolyte levels before reversing the acidosis with insulin.
Soru 228Soru →

A client is receiving care 4 hours after a right-sided pneumonectomy. The nurse notes the client has become increasingly restless. Current vital signs include a blood pressure of 138/86 mm Hg, heart rate of 118/min, and respiratory rate of 28/min. Arterial blood gas (ABG) analysis reveals a pH of 7.28, PaCO2 of 56 mm Hg, HCO3 of 24 mEq/L, and PaO2 of 64 mm Hg. Which intervention should the nurse implement immediately to reduce the risk of further physiological deterioration?

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Cevap: Place the client in a right lateral position and ensure the head of the bed is elevated

Cevap

Place the client in a right lateral position and ensure the head of the bed is elevated.
Following a pneumonectomy (complete removal of a lung), the standard of care to reduce the risk of respiratory compromise is to position the client on their operative side (in this scenario, the right side) or flat on their back. This critical positioning strategy ensures that the remaining functioning lung (the left lung) is positioned uppermost. This prevents the weight of the heart and mediastinal structures from compressing the healthy lung, thereby maximizing its ability to expand and participate in gas exchange. Elevating the head of the bed further facilitates diaphragmatic excursion to help resolve the client's acute respiratory acidosis and hypoxemia.

Adım Adım Çözüm

1
Interpret the client's vital signs and Arterial Blood Gas (ABG) results.
The ABGs show a low pH (7.28), elevated PaCO2 (56), normal HCO3 (24), and low PaO2 (64). This indicates uncompensated respiratory acidosis with hypoxemia.
Accurate ABG interpretation is required to identify the precise physiological decompensation occurring (respiratory failure).
2
Analyze the specific surgical procedure (right-sided pneumonectomy) and its implications for risk reduction.
A pneumonectomy involves the removal of an entire lung. The right lung is absent, meaning the client is entirely dependent on the left lung for gas exchange.
Surgical context dictates which nursing interventions are safe or strictly contraindicated to prevent life-threatening complications.
3
Determine the priority intervention to optimize gas exchange and reduce risk.
The client must be positioned on their operative side (right side) or supine, with the head of the bed elevated.
Placing the client on the operative side ensures the fluid-filled empty space remains dependent, allowing the remaining 'good' lung (left lung) to remain uppermost. This maximizes its expansion and improves ventilation to correct the respiratory acidosis.

Anahtar Kavram

Post-Pneumonectomy Positioning and ABG Analysis
Soru 229Soru →

A nurse on a medical-surgical unit is evaluating a client with end-stage renal disease who was admitted after missing multiple scheduled hemodialysis sessions. The client appears lethargic and exhibits deep, rapid respirations. Based on this clinical presentation, which of the following arterial blood gas (ABG) results is most expected?

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Cevap: pH=7.28\text{pH} = 7.28, PaCO2=30 mm Hg\text{PaCO}_2 = 30 \text{ mm Hg}, HCO3−=15 mEq/L\text{HCO}_3^- = 15 \text{ mEq/L}

Cevap

The expected arterial blood gas result is pH=7.28\text{pH} = 7.28, PaCO2=30 mm Hg\text{PaCO}_2 = 30 \text{ mm Hg}, and HCO3−=15 mEq/L\text{HCO}_3^- = 15 \text{ mEq/L}.
Missing scheduled hemodialysis leads to an accumulation of metabolic waste products and acids, resulting in metabolic acidosis (characterized by a low pH and a low HCO3−\text{HCO}_3^-). In response to the acidic environment, the central chemoreceptors stimulate the respiratory center, causing the client to increase the depth and rate of respirations (Kussmaul respirations). This compensatory hyperventilation expels excess carbon dioxide (CO2\text{CO}_2), which lowers the PaCO2\text{PaCO}_2. The correct ABG reflects this exact physiological state: an acidemic pH (7.28), a low bicarbonate indicating the metabolic source (15 mEq/L), and a compensatory decrease in carbon dioxide (30 mm Hg).

Adım Adım Çözüm

1
Identify the primary acid-base disturbance.
Missed hemodialysis causes retention of uremic waste and metabolic acids, leading to metabolic acidosis (decreased pH and decreased HCO3-).
The kidneys are unable to excrete hydrogen ions or regenerate bicarbonate.
2
Analyze the physical assessment findings.
The client is exhibiting deep, rapid respirations, known as Kussmaul respirations.
This is a classic symptom of severe metabolic acidosis.
3
Determine the physiological consequence of the symptoms.
Hyperventilation effectively blows off carbon dioxide (CO2), lowering the PaCO2 in the blood.
The respiratory system is attempting to compensate for the metabolic acidosis by inducing a mild respiratory alkalosis.
4
Select the matching ABG values.
The correct ABG must show low pH (< 7.35), low HCO3- (< 22 mEq/L), and low PaCO2 (< 35 mm Hg).
These values collectively indicate metabolic acidosis with partial respiratory compensation.

Anahtar Kavram

Clients with acute renal failure or missed dialysis develop high anion gap metabolic acidosis; the body compensates by hyperventilating (Kussmaul respirations) to lower PaCO2.
Soru 230Soru →

A nurse is caring for a client diagnosed with Guillain-Barré syndrome who reports increasing difficulty swallowing and generalized weakness. The client is restless, has shallow respirations at 28 breaths/min, and an arterial blood gas (ABG) reveals: pH=7.29\text{pH} = 7.29, PaCO2=58 mm Hg\text{PaCO}_2 = 58 \text{ mm Hg}, HCO3−=24 mEq/L\text{HCO}_3^- = 24 \text{ mEq/L}, and PaO2=62 mm Hg\text{PaO}_2 = 62 \text{ mm Hg}. Based on these findings, which of the following is the priority nursing action?

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Cevap: Prepare the client for immediate endotracheal intubation and mechanical ventilation.

Cevap

Prepare the client for immediate endotracheal intubation and mechanical ventilation.
The ABG results demonstrate uncompensated acute respiratory acidosis (pH<7.35\text{pH} < 7.35 and PaCO2>45 mm Hg\text{PaCO}_2 > 45 \text{ mm Hg}). In a client with Guillain-Barré syndrome, this hypercapnia, combined with shallow breathing and difficulty swallowing, signifies severe neuromuscular paralysis extending to the diaphragm and bulbar muscles. The client is rapidly losing the physical ability to ventilate. Immediate intubation and mechanical ventilation are required to secure the airway, provide adequate ventilation, and prevent respiratory arrest.

Adım Adım Çözüm

1
Analyze the arterial blood gas (ABG) values.
The results show a pH\text{pH} of 7.29 (acidosis), a PaCO2\text{PaCO}_2 of 58 mm Hg (respiratory origin), a normal HCO3−\text{HCO}_3^-, and a PaO2\text{PaO}_2 of 62 mm Hg (hypoxemia).
Accurate interpretation of ABGs is required to identify uncompensated acute respiratory acidosis and hypoxemia.
2
Correlate the ABG findings with the pathophysiology of Guillain-Barré syndrome.
The syndrome causes ascending neuromuscular paralysis. Shallow breathing, dysphagia, and elevated carbon dioxide indicate that paralysis has severely affected the bulbar and diaphragmatic muscles.
Understanding the disease process explains why the respiratory failure is occurring (pump failure due to muscle weakness).
3
Determine the most appropriate life-saving intervention.
The client is losing the physical ability to ventilate independently and requires an artificial airway and mechanical ventilation.
Prioritization must focus on ABCs (Airway and Breathing). Since the client cannot physically breathe effectively, mechanical support is the only viable solution.

Anahtar Kavram

Management of acute respiratory failure in neuromuscular disorders
Soru 231Soru →

A nurse is preparing to administer a unit of packed red blood cells (PRBCs) to an adult client with symptomatic anemia. Arrange the following actions in the correct chronological order that the nurse should perform them, from first action to last action.

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Cevap

The correct sequence is: prime the tubing with normal saline, verify the blood product with a second nurse, obtain baseline vital signs, initiate the transfusion slowly, and remain with the client for the first 15 minutes.
Safe administration of packed red blood cells requires strict adherence to a standardized sequence to prevent fatal errors and manage adverse reactions. The equipment must first be primed with normal saline, the only compatible fluid. Next, mandatory bedside verification by two nurses ensures the right blood goes to the right client. Baseline vitals must then be obtained immediately before starting the flow. The infusion is initiated slowly to limit exposure in case of an error, and the nurse must remain with the client for the first 15 minutes when acute, life-threatening reactions are most likely to occur.

Adım Adım Çözüm

1
Prime the Y-type blood administration set with 0.9% sodium chloride.
The IV line is prepared, purged of air, and flushed with a compatible solution.
Normal saline is the only fluid compatible with blood products. Priming first prevents hemolysis and ensures the line is ready for the blood.
2
Verify the blood product and client identity with a second registered nurse at the bedside.
The correct blood component is confirmed for the correct client.
This is a critical safety standard to prevent fatal ABO incompatibility errors.
3
Obtain and document the client's baseline vital signs.
A pre-transfusion physiological baseline is established.
Accurate vital signs taken immediately before starting allow the nurse to identify subtle changes that indicate an adverse transfusion reaction.
4
Spike the blood bag and initiate the transfusion at a slow rate.
The blood begins infusing into the client.
Starting slowly limits the amount of incompatible blood received if an acute reaction occurs, minimizing potential harm.
5
Remain with the client for the first 15 minutes of the transfusion.
The client is closely observed during the highest-risk period.
Severe, life-threatening transfusion reactions typically manifest within the first 15 minutes or first 50 mL of the infusion.

Anahtar Kavram

Blood Product Administration Sequence and Safety
Tahmini Süre:1m 30s
Soru 232Soru →

While assessing a client who is 4 hours postoperative following an exploratory laparotomy, the nurse suspects the onset of hypovolemic shock. Which of the following clinical findings are considered early compensatory manifestations of this condition? Select all that apply.

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Cevap: Narrowed pulse pressure; Restlessness and apprehension; Heart rate of 118 beats/minute

Cevap

The early compensatory manifestations of hypovolemic shock include narrowed pulse pressure, restlessness and apprehension, and tachycardia (e.g., heart rate of 118 beats/minute).
During the early compensatory stage of hypovolemic shock, the body activates the sympathetic nervous system to maintain perfusion. This physiological adaptation causes an increase in heart rate (tachycardia) to boost cardiac output, peripheral vasoconstriction which raises diastolic blood pressure (leading to a narrowed pulse pressure), and mild cerebral hypoxia which manifests clinically as restlessness, apprehension, or anxiety.

Adım Adım Çözüm

1
Analyze the client's postoperative status and the physiological risk.
The client is at risk for hypovolemic shock due to potential surgical blood loss or fluid shifts following a laparotomy.
Identifying the etiology of potential shock helps anticipate the expected physiological response.
2
Differentiate between the stages of shock (compensatory versus progressive/decompensated).
The compensatory stage relies on sympathetic nervous system activation to maintain cardiac output and vital organ perfusion.
The question specifically asks for early compensatory manifestations, requiring the exclusion of late findings.
3
Evaluate each assessment finding against the physiological changes of the compensatory stage.
Tachycardia, narrowing pulse pressure, and neurological changes (restlessness) are compensatory. Hypotension is a late sign, and warm skin is atypical for hypovolemic shock.
Accurate identification of early signs allows for prompt, life-saving interventions before irreversible tissue damage occurs.

Anahtar Kavram

Early recognition of the compensatory stage of hypovolemic shock
Soru 233Soru →

A client who recently underwent a large bowel resection is recovering in the surgical unit. The nurse is actively monitoring the client for postoperative complications, specifically fluid volume deficit. Which of the following assessment findings is the earliest indicator that the client is developing hypovolemic shock?

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Cevap: Unexplained restlessness and an increasing resting heart rate

Cevap

Unexplained restlessness and an increasing resting heart rate
In the early (compensatory) stage of hypovolemic shock, the body activates the sympathetic nervous system to maintain cardiac output and tissue perfusion. This physiological adaptation leads to mild tachycardia and causes mild cerebral hypoxia, which presents as unexplained restlessness, apprehension, or anxiety. These are typically the first detectable signs of clinical deterioration, occurring well before blood pressure drops.

Adım Adım Çözüm

1
Recall the physiological stages of shock (initial, compensatory, progressive, refractory).
Early shock triggers compensatory mechanisms to maintain cardiac output.
Understanding the timeline of physiological responses is necessary to identify early versus late signs.
2
Identify the effects of the compensatory stage on the body.
The sympathetic nervous system activates, leading to an increased heart rate and subtle changes in mental status due to mild cerebral hypoxia.
These are the body's first attempts to preserve blood flow to vital organs.
3
Differentiate these early signs from late, decompensated signs of shock.
Hypotension, oliguria, and mottled skin occur when compensatory mechanisms begin to fail.
Selecting a late sign would delay critical interventions.

Anahtar Kavram

Early Indicators of Hypovolemic Shock
Tahmini Süre:1m 0s
Soru 234Soru →

An older adult client is admitted to the surgical recovery unit immediately following a left eye cataract extraction with intraocular lens implantation. The client reports a mild 'scratchy' sensation in the operated eye and asks the nurse for help getting comfortable. Which nursing intervention regarding positioning and comfort is most appropriate?

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Cevap: Elevate the head of the bed to 30 degrees and assist the client to rest in a supine position or on the right side.

Cevap

The nurse should elevate the head of the bed to 30 degrees and position the client supine or on their right (non-operative) side.
After cataract surgery, nursing care focuses on preventing an increase in intraocular pressure (IOP) and protecting the surgical site. Elevating the head of the bed to 30 degrees (Semi-Fowler's position) promotes venous drainage from the head, which helps keep IOP low. The client should be positioned either supine or on the non-operative side (the right side, in this scenario) to prevent direct pressure on the operated left eye. The reported 'scratchy' sensation is a normal, expected finding postoperatively and does not indicate a complication that requires deviation from these standard positioning protocols.

Adım Adım Çözüm

1
Analyze the procedure and the client's symptoms.
The client had left eye cataract surgery and is experiencing a normal postoperative 'scratchy' sensation.
Understanding the surgical site and expected postoperative findings dictates the appropriate comfort and safety interventions.
2
Identify the primary postoperative goals for cataract extraction.
The main goals are to prevent an increase in intraocular pressure (IOP) and protect the surgical site from trauma or direct physical pressure.
Increased IOP or direct pressure can cause hemorrhage, suture rupture, or intraocular lens displacement.
3
Evaluate the positioning options based on these physiological goals.
Elevating the head of the bed to 30 degrees promotes venous drainage (lowering IOP). Lying on the non-operative right side or back successfully avoids pressure on the left eye.
These positions are anatomically and physiologically optimal for recovery, unlike lying flat or on the operative side.
4
Assess the delegation aspect in the remaining distractors.
Delegating the assessment of the eye to a UAP is unsafe and outside their scope of practice.
Only registered nurses have the training and licensure to perform clinical assessments of surgical sites.

Anahtar Kavram

Post-Cataract Surgery Positioning and Care
Tahmini Süre:1m 0s
Soru 235Soru →

A nurse is monitoring a client who is 3 hours post-operative following a radical nephrectomy. Which of the following assessment findings should the nurse identify as early (compensatory) indicators of hemorrhagic shock? Select all that apply.

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Cevabı ve açıklamayı göster

Cevap: Pulse pressure narrowing from 45 mm Hg to 25 mm Hg; Sudden onset of mild restlessness and anxiety; Apical heart rate increasing from 76 to 112 beats per minute

Cevap

The early compensatory indicators of hemorrhagic shock are a narrowing pulse pressure, a sudden onset of mild restlessness and anxiety, and an increasing apical heart rate.
In the early (compensatory) stage of hemorrhagic shock, the sympathetic nervous system is activated to maintain vital organ perfusion. This causes peripheral vasoconstriction, which raises the diastolic blood pressure, leading to a narrowing pulse pressure. The heart rate increases (tachycardia) to sustain cardiac output. Additionally, mild cerebral hypoxia and sympathetic stimulation manifest early as sudden restlessness, anxiety, or apprehension.

Adım Adım Çözüm

1
Analyze the client's clinical context.
The client is 3 hours post-operative for a major abdominal surgery, placing them at high risk for acute internal blood loss and subsequent hypovolemic (hemorrhagic) shock.
Identifying the specific risk profile helps anticipate the physiological signs associated with fluid volume deficit.
2
Recall the pathophysiology of the early (compensatory) stage of shock.
The body activates the sympathetic nervous system to maintain cardiac output and blood pressure. This causes vasoconstriction, tachycardia, and the shunting of blood away from non-vital peripheral tissues toward vital organs.
Understanding the body's compensatory mechanisms is necessary to distinguish early signs from late signs of shock.
3
Evaluate each assessment finding against the expected compensatory responses.
Tachycardia, a narrowing pulse pressure (due to increased diastolic blood pressure from vasoconstriction), and altered mental status (from mild cerebral hypoxia) perfectly match the early stage. Hypotension is a late sign, and warm skin indicates vasodilation, not vasoconstriction.
This elimination process systematically isolates the correct indicators of early hemorrhagic shock.

Anahtar Kavram

Early (Compensatory) Signs of Hemorrhagic Shock
Tahmini Süre:1m 30s
Soru 236Soru →

A nurse is evaluating the arterial blood gas (ABG) results of a client who has severely depressed respirations following a suspected opioid overdose. The nurse determines the client is experiencing uncompensated respiratory acidosis. Which of the following ABG values would confirm this specific finding? Select all that apply.

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Cevabı ve açıklamayı göster

Cevap: pH 7.31; PaCO2 58 mm Hg; HCO3- 23 mEq/L

Cevap

The values that confirm uncompensated respiratory acidosis are a pH of 7.31, PaCO2 of 58 mm Hg, and HCO3- of 23 mEq/L.
Uncompensated respiratory acidosis is characterized by a low pH (less than 7.35) and an elevated PaCO2 (greater than 45 mm Hg) due to inadequate ventilation. The bicarbonate (HCO3-) remains within the normal range (22 to 26 mEq/L) because the kidneys have not yet initiated a compensatory response.

Adım Adım Çözüm

1
Analyze the pH to determine if the client is acidotic or alkalotic.
A pH less than 7.35 indicates acidosis. The value of 7.31 confirms acidemia.
Identifying the primary acid-base imbalance is the first step in ABG interpretation.
2
Evaluate the PaCO2 to determine if the cause is respiratory.
A PaCO2 greater than 45 mm Hg indicates a respiratory cause for the acidosis. The value of 58 mm Hg confirms hypercapnia.
Elevated carbon dioxide levels indicate hypoventilation, which drives respiratory acidosis.
3
Assess the HCO3- to determine the level of compensation.
An HCO3- within the normal range of 22 to 26 mEq/L indicates that no metabolic compensation has occurred yet. The value of 23 mEq/L confirms an uncompensated state.
In acute respiratory acidosis, it takes days for the kidneys to retain enough bicarbonate to compensate for the elevated CO2.

Anahtar Kavram

Uncompensated Respiratory Acidosis
Soru 237Soru →

A client admitted with rapid atrial fibrillation is receiving a continuous intravenous (IV) infusion of diltiazem through a single-lumen peripheral catheter. The healthcare provider prescribes a scheduled dose of IV pantoprazole for stress ulcer prophylaxis. The nurse checks a drug reference guide and notes that pantoprazole is chemically incompatible with diltiazem. Which action is the most appropriate for the nurse to take?

Cevabı ve açıklamayı göster

Cevap: Initiate a second peripheral intravenous catheter to administer the pantoprazole.

Cevap

The most appropriate action is to initiate a second peripheral intravenous catheter to administer the pantoprazole.
Diltiazem is a critical, continuous cardiac medication used to control heart rate. It should not be paused for the administration of a routine or secondary medication. Because it is chemically incompatible with pantoprazole, the two cannot be infused through the same line simultaneously. Therefore, the safest and most appropriate nursing action is to establish a second peripheral IV line to administer the pantoprazole, ensuring both therapies are delivered safely and without interruption.

Adım Adım Çözüm

1
Identify the prescribed medications and verify their compatibility.
Diltiazem and pantoprazole are chemically incompatible.
Mixing incompatible medications in the same IV line can lead to precipitate formation, posing a severe embolic risk to the client.
2
Evaluate the clinical purpose and nature of the primary continuous infusion.
Diltiazem is a critical cardiac medication used for rate control in rapid atrial fibrillation.
Interrupting a continuous vasoactive or antiarrhythmic drip can rapidly lead to hemodynamic instability or a return of the rapid ventricular response.
3
Determine the safest administration route that satisfies both medication requirements.
A second, dedicated IV line must be established.
This ensures the critical continuous cardiac medication is not paused, while safely allowing the administration of the incompatible secondary medication.

Anahtar Kavram

Management of Intravenous Incompatibilities and Continuous Cardiac Infusions
Soru 238Soru →

A medical-surgical nurse is developing a plan of care for a client who is 2 hours postoperative following a subtotal thyroidectomy. Which of the following interventions should the nurse include to reduce the risk of physiological complications? (Select all that apply.)

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Cevabı ve açıklamayı göster

Cevap: Maintain the client in a semi-Fowler's position with the head and neck supported in neutral alignment; Assess the anterior surgical dressing and palpate the posterior neck for occult bleeding; Ensure intravenous calcium gluconate is immediately available on the surgical unit

Cevap

The correct actions are maintaining a semi-Fowler's position with neutral neck alignment, assessing the anterior dressing and posterior neck for bleeding, and ensuring intravenous calcium gluconate is available.
Following a thyroidectomy, clients are at high risk for airway compromise, hemorrhage, and hypocalcemia. Maintaining a semi-Fowler's position minimizes neck edema, assessing the posterior neck detects occult bleeding, and having calcium gluconate available prepares the team for potential parathyroid gland damage.

Adım Adım Çözüm

1
Identify the surgical procedure and the timeframe.
The client is 2 hours postoperative following a subtotal thyroidectomy.
Understanding the procedure and timing helps anticipate immediate postoperative risks.
2
Determine the major risks associated with this surgery.
Primary risks include airway obstruction from edema, occult hemorrhage, and hypocalcemia due to accidental parathyroid gland damage.
Risk reduction potential relies on recognizing these specific threats early.
3
Evaluate each intervention against the identified risks.
Semi-Fowler's position reduces edema; checking the posterior neck detects hidden bleeding; and having calcium gluconate ready addresses potential hypocalcemia.
These specific actions directly mitigate the highest-priority physiological risks.

Anahtar Kavram

Reduction of Risk Potential: Postoperative Care and Complication Prevention
Soru 239Soru →

A client with severe chronic obstructive pulmonary disease (COPD) and right-sided heart failure (cor pulmonale) is receiving treatment for acute respiratory distress and massive lower extremity edema. The client requires assistance with all activities of daily living. Which nursing actions appropriately address the client's basic care and comfort needs? Select all that apply.

Geçerli olan tümünü seçin

Cevabı ve açıklamayı göster

Cevap: Provide frequent, small meals that are high in calories and easy to chew; Suspend the client's heels off the bed by placing a supportive cushion under the calves; Offer oral hygiene with a soft toothbrush and non-alcohol-based mouthwash every few hours

Cevap

The correct interventions are providing frequent small meals, suspending the heels off the bed, and offering regular oral hygiene.
Providing small, high-calorie meals reduces the energy required for eating and digestion, which is crucial for clients with severe respiratory distress. Suspending the heels relieves pressure on edematous, vulnerable tissues, preventing pressure injuries. Frequent oral hygiene with non-alcohol-based products keeps mucous membranes moist and comfortable, especially for clients breathing through their mouths or receiving oxygen therapy.

Adım Adım Çözüm

1
Analyze the client's physiological needs related to severe COPD, cor pulmonale, and peripheral edema.
The client requires energy conservation, pressure relief for edematous extremities, and mucous membrane care.
Systemic fluid overload and respiratory distress significantly increase metabolic demands and the risk of skin breakdown.
2
Evaluate each intervention against basic care standards and safety protocols for this specific condition.
Nutritional support via small meals, pressure relief via heel suspension, and regular oral care are identified as safe and effective.
These actions directly promote comfort and hygiene without compromising respiratory or circulatory function.
3
Identify contraindicated actions in the remaining options.
Popliteal pressure, delegating assessments, and ignoring neurological changes are recognized as unsafe practices.
These actions violate positioning guidelines, delegation rules, and pathophysiology principles.

Anahtar Kavram

Basic care and comfort for clients with severe cardiopulmonary compromise involves energy conservation, skin integrity maintenance, and recognizing acute physiological changes over normal aging.
Soru 240Soru →

A nurse is preparing to administer an initial prescribed dose of intravenous amphotericin B deoxycholate 50 mg50\text{ mg} in 500 mL500\text{ mL} of 5%5\% dextrose in water (D5W) to a client with a severe systemic fungal infection. The medication is scheduled to infuse over 4 hours. The client currently has a single peripheral intravenous (IV) catheter with a continuous infusion of 0.9%0.9\% sodium chloride running at 75 mL/hr75\text{ mL/hr}. Which sequence of actions is the safest and most appropriate for the nurse to implement?

Cevabı ve açıklamayı göster

Cevap: Pause the 0.9%0.9\% sodium chloride infusion, flush the IV catheter with D5W, administer the amphotericin B at 125 mL/hr125\text{ mL/hr}, and flush again with D5W before restarting the saline.

Cevap

The nurse must pause the 0.9%0.9\% sodium chloride infusion, flush the line with D5W, infuse the amphotericin B at 125 mL/hr125\text{ mL/hr}, and flush again with D5W before resuming the saline.
Amphotericin B deoxycholate is highly incompatible with saline solutions and will form a precipitate if mixed. Because the client has only one IV site, the continuous saline infusion must be paused, and the line must be thoroughly flushed with 5%5\% dextrose in water (D5W) prior to and following the medication administration. The correct infusion rate is calculated by dividing the total volume (500 mL500\text{ mL}) by the total time (4 hours4\text{ hours}), resulting in 125 mL/hr125\text{ mL/hr}.

Adım Adım Çözüm

1
Identify the IV compatibility of the prescribed medication.
Amphotericin B deoxycholate is incompatible with 0.9%0.9\% sodium chloride and must be mixed and flushed exclusively with 5%5\% dextrose in water (D5W).
Mixing amphotericin B with saline causes precipitation, which can lead to catheter occlusion or an embolism.
2
Determine the appropriate line management strategy for a single IV access.
The continuous saline infusion must be paused, and the IV line must be completely cleared of saline by flushing with D5W before and after the amphotericin B infusion.
This ensures the incompatible solutions do not meet within the catheter lumen.
3
Calculate the correct infusion pump rate in mL/hr.
Divide the total volume (500 mL500\text{ mL}) by the prescribed infusion time (4 hours4\text{ hours}) to yield a rate of 125 mL/hr125\text{ mL/hr}.
Infusion pumps are programmed based on fluid volume over time, not medication dosage over time.

Anahtar Kavram

Amphotericin B IV Compatibility and Safe Administration
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