Changes in the requirements for blood transfusion in brain surgery

Area of Science:

• Neurosurgery
• Anesthesiology
• Medical Technology

Background:

• Blood transfusions were historically common in neurosurgical procedures.
• Anesthetic techniques have evolved significantly over recent decades.

Purpose of the Study:

• To investigate trends in blood transfusion volumes for specific neurosurgical operations.
• To identify anesthetic and surgical factors influencing blood loss.

Main Methods:

• Comparative analysis of blood transfusion data from 1965-66, 1971-72, and 1978-79.
• Review of anesthetic techniques employed during the study periods, including controlled hyperventilation (hypocapnia) and the use of halothane.

Main Results:

• A notable decrease in blood transfusions was observed between 1965-66 and 1971-72.
• A further, smaller reduction in blood transfusions occurred between 1971-72 and 1978-79.
• The introduction of controlled hyperventilation (hypocapnia) correlated with the initial significant drop in blood usage.

Conclusions:

• Controlled hyperventilation is a key factor in reducing blood transfusion requirements during neurosurgery.
• Avoidance of halothane, induced hypotension, and microsurgical techniques contributed to subsequent reductions in blood loss.
• Optimized neurosurgical anesthesia can lead to cost savings by minimizing the need for blood transfusions.