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An improved method for recording blood pressure in the tethered monkey
1Laboratory of Behavioral Sciences, National Institute on Aging, Baltimore, Maryland 21224.
The American Journal of Physiology
|June 1, 1990
Summary
This study introduces a novel tethering system for continuous blood pressure monitoring in animals. The system minimizes measurement errors and eliminates the need for sedation during zero adjustments, reducing infection risk.
Area of Science:
- Physiology
- Biomedical Engineering
- Animal Research
Background:
- Existing tethering systems for continuous blood pressure monitoring present significant challenges.
- Vertical animal movement causes measurement errors due to changing transducer height.
- Repeated zero adjustments require animal sedation and catheter disconnection, increasing infection risk.
Purpose of the Study:
- To develop an improved tethering system for accurate, continuous blood pressure recording.
- To eliminate measurement errors caused by animal movement.
- To enable zero adjustments without animal sedation or catheter disconnection.
Main Methods:
- Implemented continuous infusion with a one-way valve near the pressure transducer to negate vertical movement errors.
- Introduced a remotely controlled, two-way solenoid valve for catheter occlusion and transducer atmospheric venting.
- Enabled zero adjustments without catheter disconnection.
Main Results:
- The novel system effectively eliminates measurement errors associated with vertical animal movement.
- Remote zero adjustment is achievable without sedating the animal or disconnecting the catheter.
- The risk of infection associated with catheter handling is significantly reduced.
Conclusions:
- The enhanced tethering system provides more accurate and less invasive continuous blood pressure monitoring.
- This system improves animal welfare and reduces experimental variability.
- It offers a significant advancement for long-term physiological monitoring in research settings.