Related Experiment Videos
[Changes in plasma volume during and after middle-ear procedures (author's transl)]
Der Anaesthesist
|September 1, 1981
Summary
This study on middle-ear surgery patients under neurolept anesthesia (NLA) and halothane found that fluid shifts occur during anesthesia and surgery. Post-anesthesia, hematocrit and protein levels rise, indicating a fluid shift out of circulation.
Area of Science:
- Physiology
- Anesthesiology
- Surgical Medicine
Context:
- Middle-ear surgery patients
- Neurolept anesthesia (NLA) with halothane
- Controlled hypotension
Purpose:
- Investigate hematocrit, plasma protein concentration, plasma volume, and intravascular protein mass changes
- Analyze fluid shifts during and after anesthesia and surgery
- Understand the physiological response to controlled hypotension
Summary:
- Patients undergoing middle-ear surgery under NLA and halothane exhibited a closed system with minimal bleeding and no infusion therapy.
- Anesthesia induction led to a significant decrease in hematocrit and plasma protein concentration within 45-60 minutes.
- Post-anesthesia, a significant increase in hematocrit and plasma protein concentration was observed, along with a decrease in plasma volume and protein mass, interpreted as an arousal reaction.
Impact:
- Provides insights into fluid dynamics and physiological responses during neurolept anesthesia.
- Highlights the temporary disequilibrium between transcapillary filtration and lymph transport.
- Contributes to understanding patient hemodynamics in controlled hypotension settings.