Vacuum Sealing Drainage: Step-by-Step Guide

Vacuum sealing drainage (VSD) is a medical technique used to treat chronic or acute wounds by applying controlled negative pressure to promote healing and remove excess fluid. This guide explains the process for caregivers and healthcare professionals, covering materials, step-by-step application, and essential safety tips. It is not a substitute for professional medical training, but a practical reference for those already familiar with the basics.

Ingredients

Sterile polyurethane foam (black, open-cell) – cut to fit wound size (e.g., 10 x 10 cm)
Sterile drainage tube (e.g., 12 Fr) – length as needed
Sterile transparent adhesive drape (e.g., 20 x 30 cm) – enough to cover foam plus 3–5 cm margin
Sterile scissors and forceps
Sterile gloves and mask
Antiseptic solution (e.g., chlorhexidine or povidone-iodine) – as per protocol
Sterile saline for irrigation – 100–200 mL
Vacuum pump or wall suction with collection canister – set to 125 mmHg (continuous or intermittent per order)
Connector tubing and Y-connector (if needed)
Gauze and sterile drape for surrounding skin protection

Instructions

Prepare the patient and materials: Explain the procedure, ensure informed consent, and position the patient comfortably. Wash hands thoroughly and put on sterile gloves, mask, and eye protection. Gather all sterile supplies.
Cleanse the wound: Irrigate the wound with sterile saline using gentle pressure. Remove any loose debris, necrotic tissue, or old dressing. Pat the surrounding skin dry with sterile gauze. Apply antiseptic to the periwound skin and allow it to dry completely.
Cut the foam: Using sterile scissors, cut the polyurethane foam to fit the wound dimensions. The foam should fill the wound cavity without overlapping onto healthy skin. For deep wounds, cut multiple pieces to fill the depth.
Place the foam: Gently pack the foam into the wound, ensuring it contacts the entire wound bed. Avoid overpacking, which can cause pressure injury.
Insert the drainage tube: Make a small slit in the foam and insert the drainage tube into it, ensuring the tube’s side holes are within the foam. Alternatively, place the tube on top of the foam and cover with a second piece of foam to create a sandwich.
Apply the transparent drape: Dry the surrounding skin thoroughly. Apply the adhesive drape over the foam and tube, ensuring a complete seal. Press the drape firmly onto the skin, leaving no wrinkles or gaps. Cut a small hole in the drape where the tube exits, and seal around the tube with extra drape or a dedicated sealing ring.
Connect to suction: Connect the drainage tube to the collection canister and then to the vacuum pump. Set the pump to the prescribed pressure (usually 125 mmHg) and mode (continuous or intermittent). Turn on the pump and observe the dressing: it should collapse and wrinkle, indicating effective negative pressure.
Check for leaks: Listen for a hissing sound and feel for air leaks. If a leak is detected, press down on the drape or apply additional drape to seal it. The dressing should remain collapsed; if it expands, the seal is broken.
Secure and document: Secure any loose tubing with tape or a tube holder. Document the wound appearance, foam placement, suction settings, and patient tolerance. Monitor the patient’s pain and vital signs.

Tips

Substitutions: If polyurethane foam is unavailable, you may use sterile gauze, but it is less effective and may dry out; change more frequently. Use a commercial VSD kit if possible, as it contains pre-cut foam and drape.
Prevent skin breakdown: Apply a skin barrier or hydrocolloid dressing around the wound to protect the skin from maceration and adhesive trauma. Change the dressing every 48–72 hours or as ordered, and inspect the skin.
Common mistake – overpacking: Filling the wound too tightly can cause ischemia and pain. The foam should fit snugly but not compress the surrounding tissue. If the patient reports increased pain, check the dressing and suction.
Leak management: A common issue is air leaks at the tube exit site. Use a small piece of drape to create a “mesentery” around the tube, or use a commercial tube fixation device. Always have extra drape on hand.

Serving Suggestions

This procedure is not a food dish, so serving suggestions are not applicable. Instead, consider the following clinical applications: VSD is commonly used for diabetic foot ulcers, pressure injuries, surgical wounds, and traumatic wounds. It can be used on various body parts, including the abdomen, limbs, and chest. Always follow your facility’s protocol and physician’s orders.

Variations

Intermittent vs. continuous suction: Some protocols use intermittent suction (e.g., 5 minutes on, 2 minutes off) to stimulate granulation tissue. Continuous suction is simpler and often preferred for patient comfort.
Instillation therapy: Some VSD systems allow for periodic instillation of saline or antiseptic solutions into the wound, which can help with cleansing. This requires a specialized pump and tubing.
Gauze-based VSD: For wounds with tunnels or undermining, some clinicians use gauze instead of foam, packing it into the wound. This is less common but may be used when foam is contraindicated.

Storage and Reheating

This is a medical procedure, not a food item, so storage and reheating are not applicable. However, sterile supplies should be stored in a clean, dry area and checked for expiration dates before use. The drainage canister should be emptied and measured according to your facility’s policy. Used dressings and tubing are disposed of as medical waste. Do not reuse single-use items.

Frequently Asked Questions

How often should the dressing be changed? Typically, VSD dressings are changed every 48–72 hours, but the frequency depends on the wound type and physician’s orders. If the dressing leaks, becomes saturated, or the patient develops fever, change it sooner.

What pressure should I use? The standard pressure is 125 mmHg, but it can range from 50 to 200 mmHg depending on the wound and patient tolerance. Always follow the physician’s prescription. Lower pressures are used for painful or superficial wounds.

Can I use VSD on a wound with exposed blood vessels or organs? No, VSD is contraindicated if there are exposed major blood vessels, organs, or anastomotic sites. It should not be used on wounds with active bleeding or necrotic tissue that has not been debrided.

Why is the dressing not collapsing? This indicates an air leak. Check the tube connections, the drape seal, and the foam placement. Press down on the drape to identify leaks and patch them with additional drape. Also, ensure the suction pump is working and the canister is not full.

Is VSD painful? Most patients experience mild discomfort, especially during dressing changes. If the patient reports severe pain, it may indicate excessive suction or tissue entrapment. Reduce the pressure or check the dressing. Pain management should be provided as needed.

What are the signs of infection? Signs include increased redness, swelling, warmth, purulent drainage, foul odor, and fever. If infection is suspected, notify the physician immediately; the dressing may need to be changed and cultures taken.

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