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Wound Dressing containing a vacuum pump

Pending Publication Date: 2020-04-30
HYDROFERA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a new way to treat wounds by using a natural material that helps to bring blood to the area and a device that can apply additional negative pressure to the wound. This helps to speed up the healing process. The device is easy to apply, self-contained, and can be easily carried by patients. Overall, this new technology helps to improve the efficiency and effectiveness of wound treatment.

Problems solved by technology

There are numerous problems with the current prior art.
The vacuum source is far from the wound bed, creating a need for tubing that is uncomfortable and unsightly for the patient, leading to compliance issues.
Tubing can be crimped or clogged leading to failure.
In sub-freezing climates, the tubing can freeze and as a result, clog leading to failure.
The pump must reduce the pressure requiring large mechanical or electrical units that can be bulky and noisy.
This is further exacerbated by long lengths of tubing that result in greater pressure drop over distance, in turn requiring a larger and more powerful pump.

Method used

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  • Wound Dressing containing a vacuum pump
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Examples

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Embodiment Construction

[0032]The present invention is a negative pressure wound therapy (NPWT) system where the reduced atmospheric pressure on the wound is achieved by two sources, (1) a porous sponge dressing material and (2) an auxiliary vacuum unit, e.g. a pump. The porous sponge dressing material is a PVA foam which provides a natural capillary pressure of about −20 mmHg to about −72 mmHg on the wound. The auxiliary pump can further reduce the pressure to maintain a therapeutic benefit, e.g. down to about −120 mmHg. The result is a NPWT system that is portable by the user and is significantly smaller than prior art devices and with minimal to no tubing required to connect the dressing to the auxiliary vacuum source.

[0033]As is used herein, reduced or negative pressure levels, such as −X mmHg, represent pressure levels relative to normal ambient atmospheric pressure, which corresponds to 760 mmHg (or 1 atm, 29.93 inHg, 101.325 kPa, 14.696 psi, etc.). Accordingly, a negative pressure value of −X mmHg r...

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Abstract

The present invention relates to a wound healing PVA sponge dressing using negative capillary pressure of the dressing material together with auxiliary negative pressure for wound treatment. The PVA sponge dressing is pretreated with gram positive and gram negative biocidal dyes for insertion into or over a wound. A negative pressure pump is mounted to the PVA sponge dressing to produce additional capillary pressure for withdrawing fluid or water vapor from the sponge dressing and a cover is mounted over the sponge material and negative pressure pump forming a unitary sealed package for placement over a wound.

Description

RELATED APPLICATIONS[0001]This is a utility patent application claiming priority and benefit from U.S. Provisional Patent Application No. 62 / 749,902 filed Oct. 24, 2018.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]NoneREFERENCE TO SEQUENCE LISTING, A TABLE OR A COMPUTER PROGRAM LISTING COMPACT DISC APPENDIX[0003]None.BACKGROUND OF THE INVENTION1. Field of Invention[0004]The present invention is directed toward a PVA wound dressing for the treatment of wounds containing a pump which administers negative pressure to the wound site.2. Background of the Invention[0005]Negative pressure wound therapy (NPWT) has long been used in the treatment of wounds and improves the rate of wound healing while removing fluid, exudates, bacteria and other healing inhibiting substances from the wound site. Extensive studies of both continuous and intermittent treatment of wounds under negative pressure were conducted in the 1980's and 1990's in various Russian institutions. This ...

Claims

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Application Information

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IPC IPC(8): A61F13/00A61M1/00A61F13/02
CPCA61M1/0003A61F13/0216A61F2013/00336A61F2013/530649A61F13/00068A61F2013/429A61F13/00063A61L2202/24A61L2/081A61L2/206A61L2/0035A61L15/24A61L15/26A61L15/425A61L2202/21A61L15/58A61L2/0094A61L2300/404A61L15/44A61F13/00059A61L15/225A61F13/05A61F13/01017A61F13/01021
Inventor DRURY, THOMAS J.HANSON, CHRISTOPHERO'GARA, JOHN E.DE SILVA, ALYSHA
Owner HYDROFERA
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