Negative pressure wound therapy (NPWT), also known as vacuum-assisted wound pressure, is a medical technique used for managing and treating various types of wounds. It is carried out via a vacuum pump, facilitating healing by creating an environment conducive to tissue healing and regeneration. In this article, we dive into the mechanism of NPWT, explore the range of wounds it addresses and the common questions individuals may have about the technique
How does NPWT work?
For some individuals, NPWT can be administered at home under the guidance of healthcare professionals. This can contribute to patient convenience and continuity of care.
Reduced complications
By managing factors such as oedema, promoting a clean wound bed, and improving tissue regeneration, NPWT reduces the risk of complications such as infections and delayed healing.
Promotion of granulation tissue
This treatment aids in the formation of granulation tissue, which acts as a scaffold for new tissue growth and contributes to wound closure.
Improved blood flow
An improvement in blood circulation allows for better delivery of essential nutrients, oxygen, and immune cells that are necessary for tissue repair and growth.
What are the components inside an NPWT?
There are a variety of NPWT systems on the market, but they all serve the purpose of providing and distributing negative pressure evenly across the wound bed. They also share a similar design featuring a core unit pump for generating negative pressure, a canister designed to gather wound drainage, and a tubing segment connecting this setup to the sealed wound.
Base unit pump
The base unit pump serves as the powerhouse of the NPWT system, providing the necessary negative pressure. It can be set to different pressures and offers two primary settings: continuous and intermittent. This flexibility allows healthcare professionals to tailor the therapy to the specific needs of the wound.
Canister
The canister plays a crucial role in collecting wound drainage and preventing spillage or contamination. As the NPWT device actively removes fluids, the canister collects and contains the extracted drainage. Regular monitoring and maintenance of the canister is needed to ensure the proper functioning of the system.
Tubing
Tubing acts as the conduit connecting the base unit pump to the sealed wound. It facilitates the transmission of negative pressure from the pump to the wound site to maintain a continuous flow. Proper tubing also prevents air leaks, preserving the integrity of the sealed system.
Sealed wound
The sealed wound dressing creates an airtight environment. It ensures that the negative pressure is effectively applied to the wound surface, preventing external contaminants from affecting the healing process. This contributes to a controlled setting for wound healing.
What are the wounds that NPWT are used on?
Surgical wounds
NPWT is utilised in cases where surgical wounds pose a higher risk of complications, ensuring that the wound receives the necessary attention for closure. The negative pressure is applied until the development of granulation tissue or local conditions allow an additional surgical procedure, such as a skin graft or flap.
Chronic and open wounds
Chronic wounds are often challenging due to their prolonged nature, NPWT creates an environment to facilitate healing. This technique employs a suction mechanism at the wound surface to actively remove excess fluids, including exudate and debris. It reduces the risk of infection, prevents excessive fluid accumulation, and promotes tissue regeneration.
Traumatic wounds
In cases of traumatic wounds from accidents, injuries, or burns, NPWT serves as a tool for wound bed preparation and effective healing. NPWT aids in debris removal, ensuring a clean wound bed, and creating a conducive environment for tissue regeneration. The negative pressure created by NPWT balances moisture and drainage to assist in wound healing.
What are the common questions on NPWT?
Can NPWT be performed at home?
In some cases, NPWT can be administered at home under the guidance of healthcare professionals. However, this will depend on the specific wound type, patient condition, and the availability of appropriate home care resources.
How long will an individual need to use NPWT?
The duration of NPWT varies depending on factors such as the type and size of the wound, the individual’s response to treatment, and healthcare provider recommendations. Patients should consult their healthcare team for personalised guidance.
Can I move around while on NPWT?
Yes, many NPWT systems are designed to allow mobility. However, movement restrictions may apply based on the specific dressing and device used. Patients should discuss mobility concerns with their healthcare providers.
Can NPWT be used for different wound sizes?
Yes, NPWT is versatile and can be used for various wound sizes, ranging from small surgical wounds to larger traumatic wounds.
Does the NPWT device produce any noise during operation?
Generally, NPWT devices operate quietly. However, the noise level can vary among different models. Patients and caregivers may inquire about the noise level to ensure a comfortable healing environment. Specific details on the noise levels of a particular NPWT device can be obtained from healthcare providers or equipment suppliers.
Are you interested in learning more about NPWT?
NPWT is one of the several methods of wound care that we at SOZO Wound and Stoma Care provide. If you are interested in learning more about NPWT, feel free to contact us, and we will be in touch soon.