Volume 107, Issue 6 pp. 2091-2101
Original Research Report

Influence of negative pressure wound therapy on peri-prosthetic tissue vascularization and inflammation around porous titanium percutaneous devices

Divya R. L. Pawar

Divya R. L. Pawar

Orthopaedic Research Laboratories, George E. Wahlen Department of Veterans Affairs Medical Center, and University of Utah Orthopaedic Center, Salt Lake City, Utah, 84148

Department of Bioengineering, University of Utah, Salt Lake City, Utah, 84112

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Sujee Jeyapalina

Sujee Jeyapalina

Orthopaedic Research Laboratories, George E. Wahlen Department of Veterans Affairs Medical Center, and University of Utah Orthopaedic Center, Salt Lake City, Utah, 84148

Department of Surgery, University of Utah School of Medicine, Salt Lake City, Utah, 84132

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Kelli Hafer

Kelli Hafer

Department of Bioengineering, University of Utah, Salt Lake City, Utah, 84112

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Kent N. Bachus

Corresponding Author

Kent N. Bachus

Orthopaedic Research Laboratories, George E. Wahlen Department of Veterans Affairs Medical Center, and University of Utah Orthopaedic Center, Salt Lake City, Utah, 84148

Department of Bioengineering, University of Utah, Salt Lake City, Utah, 84112

Correspondence to: K. N. Bachus; e-mail: [email protected]Search for more papers by this author
First published: 10 January 2019
Citations: 5

Abstract

Negative Pressure Wound Therapy (NPWT) has been shown to limit downgrowth around percutaneous devices in a guinea pig model. However, the influence of NPWT on peri-prosthetic tissue characteristics leading to limited downgrowth is still unclear. In order to investigate this, 12 CD hairless rats were assigned into two groups, NPWT and Untreated (n = 6/group). Each animal was implanted with a porous coated titanium percutaneous device and was dressed with a gauze and semi-occlusive base dressing. Post-surgery, animals in the NPWT Group received a regimen of NPWT treatment (−70 to −90 mmHg). After 4 weeks, tissue was collected over the device and stained with CD31 and CD68 to quantify blood vessel density and inflammation, respectively. The device with the surrounding tissue was also collected to quantify downgrowth. NPWT treatment led to a 1.6-fold increase in blood vessel densities compared to untreated tissues (p < 0.05). NPWT treatment also resulted in half the downgrowth as the Untreated Group, although not statistically significant (p = 0.19). Additionally, the results showed a trend toward increased CD68 cell densities in the NPWT Group compared to the Untreated Group (p = 0.09). These findings suggest that NPWT may influence wound healing responses in percutaneous devices by increasing blood vessel densities, limiting downgrowth and potentially increasing inflammation. Overall, NPWT may enhance tissue vascularity around percutaneous devices, especially in patients with impaired wound healing. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 2091–2101, 2019.

CONFLICT OF INTEREST

All authors confirm that there is no potential conflict of interest including employment, stock ownership, consultancies, honoraria, paid expert testimony, and patent applications/registrations influencing this work.

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