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Pulmonary artery catheter introducers: do the component parts affect flow rate?
S A Hyman1, D W Smith, R England
1Department of Anesthesiology, Vanderbilt University, Nashville, TN 37232-2125.
Anesthesia and Analgesia
|November 1, 1991
Summary
Arrow sheath introducers significantly reduce flow. Removing the side port during massive transfusion is recommended to maximize flow, while altering the obturator offers minimal benefit.
Area of Science:
- Medical Devices
- Fluid Dynamics
- Emergency Medicine
Background:
- Arrow sheath introducers are critical in massive transfusion and catheter insertion.
- Components like the sheath, side port, and obturator may impede maximum flow.
Purpose of the Study:
- To quantify the impact of different arrow sheath introducer configurations on flow rates.
- To evaluate the effect of removing specific components on fluid dynamics.
Main Methods:
- Six configurations of arrow sheath introducers were tested, including variations in sheath, side port, and obturator presence/length.
- Flow rates (mL/min) were measured for each configuration.
- Statistical analysis (P < 0.0001) was used to compare flow rates between configurations.
Main Results:
- Flow decreased progressively with the addition of the side port and obturator.
- Removing the side port (C2) and using a shorter obturator (C5) significantly increased flow compared to configurations with both (C3, C4).
- The configuration without any components (C6) demonstrated the highest flow rate, significantly exceeding all others.
Conclusions:
- Removing or altering the obturator provides only modest flow improvements.
- For massive transfusion scenarios, removing the side port is recommended to optimize flow until lower flow rates are sufficient.
- Understanding component impact is crucial for maximizing flow in critical care settings.