Harmony P4 HD modular | Vacuum Solutions | Socket Technologies / Liners | Lower Limb Prosthetics | Prosthetics | Ottobock US B2B Site
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Harmony P4 HD modular

Item #: 4R183

Heavy Duty mechanical vacuum pump with Vertical Shock and Torsion

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Suggested HCPCS Coding: L5782 + L5984 + L5988
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The Harmony P4 Modular is a line extension to our mechanical vacuum pumps whose design allows for different proximal connections with the same fast vacuum generation as the other P4 pumps. The Harmony P4 pumps also incorporate a vertical shock reducing pylon and torsion unit in addition to active vacuum volume management. The modular design with external tubing allows for easy upgrade from older pumps or into existing vacuum sockets.

Harmony’s proven clinical benefits

  • Limb volume management1
  • Reduces pistoning between the limb and socket2
  • Improves residual limb health3
  • Helps improve balance, reduce risk of falls and improve walking4



1 Kahle et al. 2014, Sanders et al. 2011, Street et al. 2006, Goswami et al. 2003, Board et al. 2001
2 Darter et al. 2016, Kahle et al. 2014, Kahle et al. 2013, Beil et al. 2002
3 Kahle et al. 2014, Hoskins et al. 2014, Traballesi et al. 2012, Brunelli et al. 2009
4 Samitier et al. 2014, Kahle et al. 2014, Kahle et al. 2013, Ferraro et al. 2011

Activity Level K3, K4
Material Aluminum, Titanium
Maximum Body Weight 110 - 330 lbs (50 - 150 kg)
Clearance Height: 4 7/8" (125 mm)
Part Weight: 23.5 oz (665 g)

4R182/4R183 Harmony P4 Instructions for Use

Instructions for Use:

Published Date: July 10, 2020

Vacuum Solutions Reimbursement Guide

Product Information: (EN)

Reimbursement: Toolkit

LL Prosthetic Documentation Packet

Product Information: (EN)

Reimbursement: Documentation Guide

Published Date: July 20, 2020

4R180 Harmony P4 | 4R181 Harmony P4 HD - Specification Sheet

Product Information: (EN)

Published Date: September 1, 2017

Clinical Research Summary: The Benefits of Vacuum Compared to Other Suspension Materials

Product Information: (EN)

The Benefits of Vacuum Compared to Other Suspension Materials: View a summary of studies comparing vacuum suspension to pin and suction suspension.

Published Date: May 1, 2013

Vacuum Studies Bibliography

Product Information: (EN)

Harmony Vacuum System Clinical Studies Bibliography: View a complete list of clinical studies for the Harmony Vacuum System

Published Date: May 1, 2015

Harmony System Brochure

Product Information: (EN)

Published Date: July 18, 2020

Vacuum Appeal Guide and Letter

Product Information: (EN)

Reimbursement: Toolkit

Elevated Vacuum Clinical Studies

Product Information: (EN)

Reimbursement: Clinical Studies

Clinical Research Summary: The Harmony: Early Fitting of Transtibial Amputees with Unhealed Residual Limb Wounds

Product Information: (EN)

The Harmony: Early Fitting of Transtibial Amputees with Unhealed Residual Limb Wounds: View a summary of studies on patients with unhealed ulcers/wounds who were fitted with Harmony.

Published Date: May 1, 2013

Harmony System Poster

Product Information: (EN)

Published Date: January 19, 2018