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[Study on development of linear-traction type skeletal muscle powered pump]
T Yomo1, H Shimizu, T Fujikawa
1Second Department of Surgery, Tokyo Medical College, Shinjyuku, Japan.
[Zasshi] [Journal]. Nihon Kyobu Geka Gakkai
|October 1, 1994
Summary
The new Linear-Traction Type Skeletal Muscle Powered Pump (LSMPP) offers improved flow rates compared to previous designs. This innovative device effectively utilizes muscle traction for enhanced cardiac flow compensation.
Area of Science:
- Biomedical Engineering
- Cardiovascular Devices
- Skeletal Muscle Physiology
Context:
- Current cardiac assist devices often require invasive procedures.
- Previous Skeletal Muscle Powered Pump (SMPP) designs involved chamber insertion.
- Optimizing pump performance with minimal preload is a key challenge.
Purpose:
- To develop and evaluate a novel Linear-Traction Type Skeletal Muscle Powered Pump (LSMPP).
- To compare the flow performance of LSMPP against the Insertion-Type SMPP (ISMPP).
- To investigate the impact of varying operational parameters (rate, preload, spring constant) on LSMPP flow.
Summary:
- The LSMPP utilizes linear muscle fiber traction, achieving sufficient flow with low preload via an integrated spring.
- Comparative analysis showed LSMPP (i-group) achieved significantly higher flow (1202 ml/min) than ISMPP (620 ml/min) at 60 beats/min and 40 mmHg preload.
- Flow rates were sensitive to rate and preload, with low preload and rate providing substantial cardiac output compensation (approx. 30% of a dog's cardiac output).
- Spring constant did not significantly affect flow rates, indicating robustness in this parameter.
Impact:
- The LSMPP represents a promising advancement in implantable cardiac assist technologies.
- Demonstrates the potential for skeletal muscle to provide significant cardiac flow compensation.
- Highlights the feasibility of achieving effective pumping with reduced preload requirements, potentially improving patient outcomes.