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Zorluk: Çok zorInfectious Diseases

A 34-year-old unhoused man is brought to the emergency department by paramedics after being found in severe distress in an alleyway. He sustained a deep puncture wound to his right sole from a rusty metal fence approximately 8 days ago. He has no known medical history, and his childhood vaccination status is unknown. On arrival, he is diaphoretic, tachycardic to 122/min, and tachypneic to 26/min. Physical examination reveals profound trismus, a sustained grimace of the facial muscles, and episodic, painful spasms of the paraspinal musculature that are immediately triggered by the noise of a dropping tray in the trauma bay. The right foot shows a 3-cm deep, purulent puncture wound surrounded by necrotic tissue.

Arrange the following therapeutic interventions in the most appropriate chronological sequence for the management of this patient's condition.

  1. 1Secure the airway, transfer to a low-stimulus environment, and administer intravenous diazepam.
  2. 2Administer intramuscular human tetanus immune globulin (HTIG).
  3. 3Perform extensive surgical debridement of the right foot wound.
  4. 4Administer the first dose of the Tdap vaccine.

Cevap

The correct sequence is to first stabilize the patient by securing the airway and administering intravenous diazepam, followed by administering HTIG to neutralize unbound toxin, then performing surgical debridement of the wound, and finally administering the Tdap vaccine for long-term immunity.
The management of severe clinical tetanus dictates a strict chronological hierarchy: 1) Resuscitation and supportive care (Airway, low-stimulus environment, GABA-agonists like diazepam) to prevent acute asphyxiation. 2) Toxin neutralization (HTIG) to bind circulating tetanospasmin before it undergoes retrograde axonal transport. 3) Source control (Surgical debridement and antibiotics) to eliminate the anaerobic environment producing the toxin; this strictly follows HTIG so that any toxin released during surgery is immediately neutralized. 4) Active immunization (Tdap vaccine) because the disease itself does not confer lasting immunity.

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1
Prioritize immediate life-saving stabilization (ABCs).
Secure the airway, minimize environmental stimuli, and administer intravenous diazepam.
The most imminent threat to life in generalized clinical tetanus is respiratory failure from diaphragmatic rigidity and laryngospasm. Benzodiazepines act as GABA agonists to control these muscle spasms.
2
Provide passive immunity to halt disease progression.
Administer intramuscular human tetanus immune globulin (HTIG).
HTIG neutralizes unbound, circulating tetanospasmin. Once the toxin enters the presynaptic terminals of inhibitory motor neurons, it is no longer accessible to antibodies. Therefore, early administration is critical.
3
Achieve source control to stop further toxin production.
Perform extensive surgical debridement of the infected wound.
Debridement removes necrotic tissue and spores. This step MUST follow HTIG administration, as the physical manipulation of the wound can release a massive surge of pre-formed toxin into the systemic circulation.
4
Establish active, long-term immunity.
Administer the Tdap (Tetanus, diphtheria, and acellular pertussis) vaccine.
Because the lethal dose of tetanus toxin is far below the threshold required to trigger an adaptive immune response, resolving the infection does not confer natural immunity. Patients must receive the active vaccine series.

Anahtar Kavram

Management Sequence of Generalized Tetanus
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Infectious Diseases

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