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Related Concept Videos

Equipments Used To Measure Blood Pressure01:30

Equipments Used To Measure Blood Pressure

Direct Method
This invasive approach involves cannulating a peripheral artery. During each cardiac contraction, pressure generates mechanical motion within the catheter, transmitted through rigid, fluid-filled tubing to a transducer. This transducer converts mechanical motion into electrical signals displayed as waveforms on a monitor. An automatic flushing system prevents blood backflow. Due to the potential risk of unexpected arterial blood loss, this method is primarily used in intensive...

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Related Experiment Video

Updated: Jun 3, 2026

Use of a Foot-Induced Digitally Controlled Resistance Device for Functional Magnetic Resonance Imaging Evaluation in Patients with Foot Paresis
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Use of a Foot-Induced Digitally Controlled Resistance Device for Functional Magnetic Resonance Imaging Evaluation in Patients with Foot Paresis

Published on: July 7, 2023

Micro-mobile foot compression device compared with pneumatic compression device.

Michael Dohm1, Kim M Williams, Tim Novotny

  • 1Western Slope Study Group, 2211 N7th Street, Grand Junction, CO 81501, USA. mdboneman@aol.com

Clinical Orthopaedics and Related Research
|March 16, 2011
PubMed
Summary
This summary is machine-generated.

A new mobile foot pump offers consistent venous velocity augmentation and improved comfort compared to an established system, potentially enhancing prophylaxis against venous thromboembolism after surgery.

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Related Experiment Videos

Last Updated: Jun 3, 2026

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Published on: May 27, 2020

Area of Science:

  • Vascular Medicine
  • Biomedical Engineering
  • Medical Devices

Background:

  • Mechanical-pharmacologic regimens are standard for preventing venous thromboembolism (VTE) after hip and knee arthroplasties.
  • Foot pumps are effective mechanical devices for VTE prophylaxis, offering an alternative to pharmacologic methods with fewer complications.
  • The efficacy of foot pumps is presumed to stem from enhanced venous blood flow.

Purpose of the Study:

  • To compare the effectiveness of a novel mobile foot pump against an established foot pump system.
  • To assess the impact of both devices on mean peak venous velocity in the common femoral, popliteal, and posterior tibial veins.

Main Methods:

  • Sixty healthy subjects were evaluated using both the established and novel foot pump systems.
  • Ultrasonography measured baseline and peak venous velocities during mechanical compression.
  • Equivalence testing using 95% confidence intervals and subjective patient ratings were employed.

Main Results:

  • The 95% CI test for equivalence between the devices was inconclusive.
  • The novel device increased posterior tibial vein velocity 11-fold and popliteal vein velocity 3-fold.
  • The established device increased posterior tibial vein velocity 15-fold and popliteal vein velocity 4-fold.
  • Subjects reported the novel device was superior in size, fit, and comfort.

Conclusions:

  • The established foot pump demonstrated higher peak velocities, but the novel device provided more consistent mean peak venous velocities.
  • The novel mobile foot pump may offer greater patient and caregiver acceptability due to improved comfort and design.