VAC Dressing: Complications, Side Effects and Benefits

VAC dressing helps wound healing but may cause side effects like pain or infection. Learn about its uses, complications, and how it supports recovery.

VAC Dressing: Complications, Side Effects and Benefits

  • Category

    General

  • Published By

    GetWellGo Team

  • Updated on

    17-Jun-2025

Vacuum assisted closure therapy

Vacuum-Assisted Closure (VAC) Therapy, or Negative Pressure Wound Therapy (NPWT), is a novel wound care method applied to facilitate healing in acute or chronic wounds and second- and third-degree burns. Below is an in-depth synopsis:

What is Vacuum-Assisted Closure (VAC) Therapy?

VAC therapy involves the application of controlled negative pressure (vacuum) to pull fluid and infection out of a wound and assist in pulling the edges of the wound together. It facilitates healing by:

  • Decreasing edema (swelling)
  • Promoting increased blood flow
  • Stimulating the growth of granulation tissue (new tissue)
  • Decreasing bacterial load

VAC dressing complications

Though extremely effective in wound healing, VAC (Negative Pressure Wound Therapy) can sometimes contribute to some complications—provided it is not properly applied or monitored. A categorized list of these complications follows:

Major Complications

These need to be addressed immediately:

Bleeding (Hemorrhage)

  • Cause: Injury to the blood vessels, particularly those in wounds with open vasculature.
  • Risk factors: Anticoagulant treatment, infected wounds, or recent surgery.
  • Signs: Sudden rise in blood in the canister, fall in blood pressure, visible bleeding.
  • Management: Discontinue VAC therapy and use pressure. Possible need for surgical correction.

Infection or Sepsis

  • Cause: Inadequate dressing change, poor hygiene, use beyond monitoring.
  • Signs: Redness increase, heat, pus, fever, foul odor.
  • Management: Discontinue VAC system, initiate antibiotics, wound culture.

Tissue Necrosis or Ischemia

  • Cause: Incorrect pressure or foam compressing healthy tissue.
  • Signs: Blackening of wound margins, non-blanching spots, pain.
  • Management: Reflow or remove foam, debride dead tissue.

Moderate Complications

Frequent but controllable:

Pain or Discomfort

  • When: Frequently during dressing changes or as a result of suction.
  • Management: Pre-medicate with analgesics, ensure proper pressure settings.

Foam Retention in Wound

  • Cause: Failure to remove all foam during dressing change.
  • Management: Surgical removal; prevention requires careful inspection upon changes.

Periwound Maceration

  • Cause: Exudate leakage onto surrounding tissue.
  • Signs: White, soggy tissue around the wound.
  • Management: Application of barrier creams or protective films.

Allergic Reactions or Skin Irritation

  • Cause: Allergic reaction to drape adhesive or foam.
  • Management: Change materials; use hypoallergenic adhesives.

Device-Related Complications

VAC Pump Failure

  • Impact: Loss of suction, wound healing compromised.
  • Treatment: Regularly check system; employ alarm-enabled devices.

Air Leaks or Seal Loss

  • Etiology: Drape application deficiency or patient movement.
  • Indications: Audible leaks, loss of suction, alarms.
  • Treatment: Re-seal drape; reapply if necessary.

VAC therapy side effects

VAC therapy is safe when properly applied, but as with any medical treatment, side effects can result. Side effects can be mild and tolerable or more severe in rare instances. The following is a list of common and uncommon side effects:

Common Side Effects:

  • Pain or Discomfort
  • Skin Irritation
  • Periwound Maceration
  • Minor Bleeding
  • Unpleasant Odor

Less Common but Serious Side Effects:

Foam Fragment Retention

Delayed Healing

Wound Edge Trauma or Necrosis

Rare but Serious Side Effects:

  • Heavy Bleeding (Hemorrhage)
  • Infection or Sepsis
  • Fistula Formation

VAC dressing benefits

VAC dressing, or Negative Pressure Wound Therapy (NPWT), is a clinically established way to enhance wound healing, minimize the risk of infection, and enhance outcomes in acute and chronic wounds.

Following are the advantages of VAC dressing:

This promotes faster wound healing

  • This stimulates granulation tissue development (healthy tissue that fills the wound).
  • This facilitates more rapid wound contraction and closure.
  • Prepares wounds for surgical closure or grafting.

Removes Excess Fluids and Exudates

  • Decreases edema (swelling) by evacuating interstitial fluid.
  • Removes infectious material, toxins, and debris from the wound.
  • Provides a clean, moist environment for healing.

Reduces Bacterial Load

  • Reduces the infection risk by evacuating contaminated fluid.
  • Provides a sealed environment that minimizes external contamination.

Improves Blood Flow (Perfusion)

  • The negative pressure triggers microcirculation.
  • Increases oxygen and nutrient delivery to the wound bed.

Promotes Wound Edge Approximation

  • Assists in drawing wound edges inward, particularly in open surgical wounds or trauma.
  • Reduces requirement of much reconstructive surgery in some instances.

Reduces Dressing Change Frequency

  • Dressings change every 48–72 hours, minimizing manipulation.
  • Less interference to the healing tissue and more patient comfort.

Can be Used at Home and Outpatient

  • Portable VAC units enable outpatient and home treatment.
  • Reduces hospital stay time and total treatment expense in some instances.

Reduces Scarring and Improves Cosmetic Results

  • Controlled healing environment leads to less scarring that is fibrotic or irregular.
  • Particularly useful in traumatic injury and post-surgical wounds.

What is VAC therapy?

VAC Therapy, or Vacuum-Assisted Closure Therapy, also referred to as Negative Pressure Wound Therapy (NPWT), is a sophisticated technique of wound care applied to facilitate quicker and cleaner wound healing by generating controlled negative pressure (vacuum) on the wound area.

How VAC Therapy Functions:

A customized dressing is placed on the wound and attached to a vacuum pump. This generates negative pressure, which:

  • Removes fluid, pus, and infectious debris
  • Enhances circulation to the region
  • Promotes the formation of healthy tissue
  • Gathers edges of the wound together

VAC dressing for wounds

VAC dressing, or Negative Pressure Wound Therapy (NPWT), is an advanced treatment technique employed to heal complicated, non-healing, or infected wounds with the assistance of a vacuum (negative pressure) device. It evacuates fluid and bacteria, increases blood flow, and promote wound healing.

How VAC Dressing Works:

  • A sterile gauze or foam dressing is inserted within the wound.
  • It is covered with an airtight adhesive drape to enclose the area.
  • A tube is attached between the dressing and a vacuum pump, which creates mild suction.

The vacuum removes:

  • Excess fluid
  • Pus or infectious material
  • Dead tissue particles

This process promotes:

  • Granulation tissue formation (new tissue)
  • Wound contraction
  • Faster healing

VAC therapy wound care

Vacuum-Assisted Closure (VAC) Therapy, also referred to as Negative Pressure Wound Therapy (NPWT), is employed to assist in quicker and cleaner healing of complicated wounds. Careful wound care during VAC therapy must be ensured to prevent complications and optimize healing.

Principles of VAC Wound Care:

  • Apply negative pressure to enhance blood flow and tissue growth.
  • Remove infectious material and fluid exudate.
  • Shelter adjacent skin and look for signs of complications.
  • Protect dressing integrity and seal to maintain effectiveness.

Step-by-Step VAC Wound Care Routine:

Wound Assessment (Prior to Application)

Assess for:

  • Size, depth, drainage
  • Signs of infection (odor, pus, redness)
  • Exposed blood vessels, tendons, or bone
  • Debride necrotic tissue prior to initiation of therapy.

Dressing Application

  • Clean the wound with saline or prescribed solution.
  • Insert foam or gauze dressing into the wound cavity (don't overpack).
  • Seal with adhesive drape to seal the dressing airtight.
  • Attach tubing from dressing to the VAC unit.
  • Apply pressure to the VAC machine (typically −75 to −125 mmHg).

Monitoring During Therapy

Verify:

  • Consistent suction
  • No air leaks
  • Exudate is entering canister

Check:

  • Color of wound edge
  • Level of pain
  • Condition of surrounding skin

Dressing Changes

  • 48–72 hours for aseptic wounds
  • 24 hours if infected

At dressing change:

  • Carefully remove old dressing (moisten if adherent)
  • Inspect for foam crumbs remaining
  • Clean and re-dress with sterile technique

Protect Periwound Skin

  • Apply skin barrier film or zinc oxide to avoid maceration or irritation from adhesive.

Pain Management

  • Pre-medicate with oral or topical analgesics prior to dressing changes as required.
  • Release pressure if patient feels pain during suction.

VAC dressing infection risk

VAC dressing prevents and manages infections in wounds by keeping the environment closed off and debriding fluids, but infection is still a potential complication when not used or cared for appropriately.

How Infection Can Occur During VAC Therapy

  • Prolonged dressing use
  • Poor hygiene during dressing changes
  • Existing wound infection not properly treated
  • Foam retention
  • Air leaks or improper seal

VAC therapy procedure steps

VAC therapy treatment process includes wound preparation, foam dressing, adhesive film sealing, and attachment to a vacuum pump for the healing process. The following are the step-by-step guidelines for effective and safe use.

Preparation

  • Hand hygiene: Proper hand wash and use of sterile gloves
  • Patient positioning: Position comfortably with proper exposure of the wound
  • Wound assessment: Take measurements of wound size, depth, drainage, and tissue type
  • Wound cleaning: Clean with sterile saline or prescribed solution
  • Debridement (if necessary): Debride necrotic tissue prior to VAC application

Foam Dressing Application

  • Choose foam type: Black (default), White (tunneling), or gauze
  • Cut foam to wound dimensions: Don't overlap onto healthy tissue
  • Put foam into wound: Fill carefully, do not pack firmly
  • Don't use multiple pieces: If using more than one, count and label clearly

Sealing with Adhesive Drape

  • Cover foam with drape: Use adhesive drape for airtight seal
  • Trim drape to size as required: Have minimum 3–5 cm margin over wound borders
  • Make access port: Cut small opening in center of drape (if not using pre-port)

Tubing and Machine Connection

  • Place suction pad (Track Pad): Over drape hole or attach tubing
  • Attach tubing to canister: Make sure tubing is secure and not bent
  • Attach canister to VAC pump: Make sure system is on and available

Setting Up Negative Pressure

  • Turn on machine: Use VAC device or portable NPWT unit
  • Set pressure: Typically –75 to –125 mmHg depending on wound type
  • Choose mode: Continuous (initial/infected) or intermittent (chronic)
  • Check seal integrity: Foam should contract visibly; no sound of air leak

Monitoring and Maintenance

  • Monitor drainage: Type, color, amount of exudate
  • Check dressing edges: For leak, maceration, or looseness
  • Check machine alarms: React to blockage, full canister, or loss of suction

Dressing Change Frequency

  • Type of Wound: Suggested Change Interval
  • Clean wound: Every 48–72 hours
  • Infected wound: Every 24–48 hours
  • Grafts/flaps: Normally within 24 hours of application

Why Choose GetWellGo for VAC Dressing for Wound Care?

GetWellGo is regarded as a leading supplier of healthcare services. We help our foreign clients choose the best treatment locations that suit their needs both financially and medically.

We offer:

  • Complete transparency
  • Fair costs.
  • 24 hour availability.
  • Medical E-visas
  • Online consultation from recognized Indian experts.
  • Assistance in selecting India's top hospitals for VAC dressing for wound care.
  • Expert doctor with a strong track record of success
  • Assistance during and after the course of treatment.
  • Language Support
  • Travel and Accommodation Services
  • Case manager assigned to every patient to provide seamless support in and out of the hospital like appointment booking
  • Local SIM Cards
  • Currency Exchange
  • Arranging Patient’s local food

Recent Blogs