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Influence of sequential pneumatic compression on postoperative venous function.

W M Blackshear1, C Prescott, F LePain

  • 1Department of Surgery, University of South Florida College of Medicine, Tampa 33612.

Journal of Vascular Surgery
|March 1, 1987
PubMed
Summary
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Sequential external pneumatic compression (SEPC) helps maintain venous function in postoperative patients. This method prevents decreases in venous capacitance and outflow, crucial for preventing deep vein thrombosis.

Area of Science:

  • Vascular Surgery
  • Physiology
  • Medical Devices

Background:

  • Postoperative patients are at increased risk for deep venous thrombosis (DVT).
  • Sequential external pneumatic compression (SEPC) is a known method to reduce DVT incidence.
  • The precise effect of SEPC on postoperative venous function remains under investigation.

Purpose of the Study:

  • To evaluate the impact of SEPC on venous capacitance (VC) and venous outflow (VO) in general surgical patients.
  • To determine if SEPC can mitigate the decline in venous function typically observed postoperatively.

Main Methods:

  • Phase I: Measured preoperative and postoperative VC and VO in 17 limbs of patients on bed rest.
  • Phase II: Applied SEPC preoperatively and for 24 hours postoperatively to one limb in 20 patients, measuring VC and VO in both limbs.

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Main Results:

  • In patients without SEPC (Phase I), significant decreases in VC (p<0.05) and VO (p<0.025) were observed postoperatively.
  • SEPC effectively prevented the decrease in VC and VO in the treated limb (p>0.2 for both).
  • SEPC also prevented a significant decrease in VC (p>0.05) and VO (p>0.5) in the contralateral, untreated limb.

Conclusions:

  • SEPC preserves venous capacitance and outflow in the postoperative period.
  • The beneficial effects of SEPC extend to the contralateral limb, suggesting a systemic effect.
  • SEPC is an effective intervention for maintaining venous function and potentially preventing DVT in surgical patients.