Anesthesia Technologist Practice Exam

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How much blood is typically required to perform a blood patch for a leakage?

  1. 10cc's

  2. 20cc's

  3. 30cc's

  4. 40cc's

The correct answer is: 20cc's

In the context of performing a blood patch for a cerebrospinal fluid (CSF) leak, the typical volume of blood required is approximately 20cc. A blood patch involves the injection of the patient’s own blood into the epidural space to form a clot, which helps seal the leakage and alleviate symptoms such as a headache. The amount of 20cc is generally considered sufficient to create an effective barrier without overwhelming the epidural space. Using too little may not provide adequate coverage for the leak, while using too much could pose risks associated with increased pressure in the epidural space. Therefore, this volume strikes a balance that is commonly practiced by anesthesia providers when addressing CSF leaks effectively and safely.

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