How to perform negative pressure wound therapy and wound repair
Nov 25, 2025
Source: Cainiu Health
Dr. Wang Lei
Introduction
Negative pressure drainage and wound repair require procedures such as assessing wound condition, preparing the drainage device, properly placing materials, adjusting negative pressure parameters, and monitoring the healing process, all of which must strictly follow aseptic principles. If signs of worsening infection, persistent bleeding, or abnormal healing occur, prompt medical attention is recommended. Assess the wound size, depth, and amount of exudate, as well as
Negative pressure wound therapy and wound repair involve assessing the wound condition, preparing the drainage device, properly placing materials, adjusting negative pressure parameters, and monitoring the healing process. Strict aseptic techniques must be followed throughout. If signs of worsening infection, persistent bleeding, or abnormal healing occur, prompt medical attention is recommended.
1. Assess the wound condition: Examine the size, depth, amount of exudate, and presence of infection. Identify any necrotic tissue or foreign bodies, and determine the wound type to select appropriate drainage material and negative pressure mode.
2. Prepare the drainage device: Use a sterile negative pressure drainage kit, including foam dressing, drainage tube, vacuum pump, and collection container. Ensure the equipment is intact and undamaged, and disinfect the work area and instruments in advance.
3. Properly place the materials: Trim the foam dressing to fit the wound precisely, ensuring complete coverage and proper insertion into wound cavities. Position the side holes of the drainage tube toward the wound bed, secure the dressing to prevent displacement, and ensure an airtight seal.
4. Adjust negative pressure settings: Set the negative pressure according to the wound condition, typically between -125 and -450 mmHg. Maintain either continuous or intermittent suction, ensure the drainage tube remains open and free of kinks, and avoid excessive pressure that may damage tissue.
5. Monitor healing progress: Regularly observe the color and volume of exudate and assess granulation tissue growth. Replace dressings and collection containers as needed, evaluate signs of infection such as pain or swelling, and adjust the treatment plan accordingly.
Keep the skin surrounding the wound clean and dry, avoid pulling on the drainage tube, ensure the patient rests adequately to minimize pressure on the wound, increase intake of protein and vitamins to support healing, and attend follow-up appointments as prescribed to ensure optimal wound recovery.
