NPWT is a valuable tool in the wound care armamentarium, but its use should be carefully considered on a case-by-case basis, taking into account the specific characteristics of the wound and the patient's overall condition. While NPWT can be effective for many wounds, it may not be suitable for all types or stages of wound healing. The following are the list of types of wounds that can typically be treated using NPWT:

Acute Wounds:

  • NPWT is commonly used for the management of acute wounds such as surgical incisions, traumatic wounds, and burns. It helps promote wound healing by reducing edema, improving blood flow, and facilitating the formation of granulation tissue.

Chronic Wounds:

  • NPWT can also be used for chronic wounds, including pressure ulcers, diabetic foot ulcers, venous ulcers, and arterial ulcers. It aids in wound bed preparation, reduces bacterial load, and promotes tissue regeneration, thereby facilitating the healing process.

Complex Wounds:

  • NPWT is particularly beneficial for complex wounds with irregular shapes, undermined edges, or exposed structures (such as bone or tendon). It provides a sealed environment that helps protect the wound from external contaminants and promotes tissue approximation and closure.

Surgical Wounds:

  • NPWT is frequently used postoperatively to manage surgical wounds and reduce the risk of surgical site infections. It helps maintain a moist wound environment, reduces wound tension, and facilitates the removal of excess exudate.

Traumatic Wounds:

  • NPWT can be applied to traumatic wounds caused by accidents, injuries, or lacerations. It assists in the removal of debris and necrotic tissue, promotes tissue perfusion, and accelerates wound healing.

While NPWT is effective for many types of wounds, there may be certain situations where it is contraindicated or less appropriate. For example:

  • NPWT may not be suitable for wounds with untreated osteomyelitis, malignancy, or exposed blood vessels or organs.
  • It may be challenging to apply NPWT to wounds with extensive undermining or tunneling.
  • Patients taking blood thinners may not be suitable for the therapy with NPWT.

The duration for changing the polyurethane (PU) foam dressing during Negative Pressure Wound Therapy (NPWT) can vary depending on several factors, including the type and severity of the wound, the amount of exudate produced, and the specific NPWT protocol prescribed by the healthcare provider. In many cases, PU foam dressings are changed approximately every 2 to 3 days during NPWT but based on the type of the wound, physician’s requirements and patient circumstances Capture Meditech’s PU foam can be changed every 5 days. Some general considerations for foam change are as follows:

  1. Exudate Levels: If the wound produces a significant amount of exudate, the PU foam may need to be changed more frequently to prevent saturation and maintain the effectiveness of the NPWT system.
  2. Wound Size and Complexity: Larger or more complex wounds may require more frequent changes to ensure optimal wound bed preparation and the removal of accumulated exudate and debris.
  3. Wound Healing Stage: The stage of wound healing may influence the frequency of PU foam changes. In the initial phases of treatment, when exudate levels are typically higher, more frequent changes may be necessary.
  4. Healthcare Provider's Assessment: The healthcare provider, often a wound care specialist or nurse, will assess the wound regularly to determine the appropriate timing for changing the PU foam. This assessment may take into account the overall condition of the wound, signs of infection, and the patient's response to treatment.
  5. Patient Comfort: Patient comfort and tolerance to the NPWT system are crucial considerations. If the patient experiences discomfort or the dressing becomes intolerable, the healthcare provider may adjust the frequency of foam changes.

Polyurethane (PU) foam used in Negative Pressure Wound Therapy (NPWT) is designed to be biocompatible and generally safe for use in wound care. The foam serves multiple purposes, including creating a sealed environment, managing exudate (fluid drainage), promoting granulation tissue formation, and facilitating wound healing. It is crucial to follow proper application procedures for NPWT, including ensuring a sealed environment, appropriate foam sizing, and correct placement to avoid the risk of infection and maceration. The trained Clinical Specialist’s of Capture Meditech follows all the necessary requirements to provide a better and appropriate care.

Prompt detection of vacuum pump failure during NPWT is essential to prevent disruptions in wound healing and ensure patient safety. If there are concerns about pump malfunction, promptly notify healthcare providers or technical support for further assistance and timely resolution. Here's a short note on how to identify such failure:

  1. Loss of Suction: The most obvious sign of vacuum pump failure during NPWT is a sudden loss of suction. If the wound dressing doesn't appear to be adhering properly or if there's a noticeable decrease in the negative pressure, it could indicate pump malfunction.
  2. Audible Cues: Listen for any abnormal sounds emanating from the pump. Unusual noises such as grinding, whining, or excessive vibration may indicate mechanical issues within the pump, signaling potential failure.
  3. Visual Inspection: Conduct a visual inspection of the vacuum pump. Look for any visible damage, leaks, or irregularities in the device. Any cracks, loose connections, or signs of wear and tear could point towards impending failure.
  4. Monitoring System Alerts: Many NPWT systems are equipped with monitoring features that alert users to pump malfunctions or errors. Keep an eye out for any error messages or alarms displayed on the device's control panel.
  5. Check Power Supply: Ensure that the pump is receiving adequate power supply. If the pump fails to start or experiences intermittent power issues, it may indicate electrical problems or a faulty power source.
  6. Evaluate Battery Life: If the NPWT system operates on battery power, check the battery status to ensure it's adequately charged. A depleted or malfunctioning battery can lead to pump failure during critical wound therapy.
  7. Consult Manufacturer Guidelines: Refer to the manufacturer's guidelines and operating manual for troubleshooting steps specific to the NPWT device in use. Follow recommended procedures for diagnosing and addressing pump failures.

It's important to note that turning off the pump without proper guidance can impact the effectiveness of NPWT and potentially hinder wound healing. The decision to modify the treatment plan should always be made in collaboration with healthcare professionals to ensure the best possible outcomes for the patient. Few points that are to be taken into consideration are as follows:

  1. Assess Wound Condition: Evaluate the wound site for any signs of irritation, inflammation, or tissue damage that could be contributing to the pain. Adjustments to the dressing technique, pressure settings, or wound care regimen may be necessary to alleviate discomfort without compromising therapy effectiveness.
  2. Consult Healthcare Provider: Severe pain during NPWT may indicate various issues, such as inadequate wound management, improper dressing application, or discomfort due to the negative pressure itself. It's important to consult with a healthcare provider to evaluate the cause of the pain and determine the appropriate course of action.
  3. Consider Pain Management Options: Healthcare providers may recommend pain management strategies to help alleviate discomfort during NPWT. This could involve administering pain medications, applying topical analgesics, or utilizing alternative wound care techniques to minimize pain while maintaining therapeutic benefits.
  4. Risk-Benefit Assessment: Consider the potential consequences of temporarily switching off the NPWT pump. While discontinuing negative pressure therapy may provide immediate relief from pain, it could also disrupt the wound healing process and compromise treatment outcomes. Balancing the need for pain relief with the therapeutic benefits of NPWT is essential in making informed clinical decisions.
  5. Patient Communication: Ensure open communication with the patient regarding their pain levels, comfort preferences, and treatment expectations. Encourage patients to express any concerns or discomfort they may experience during NPWT, and address their needs promptly in collaboration with the healthcare team.

There is no standard number of NPWT sessions required for a wound to heal as it depends on various factors specific to each patient and wound. Close monitoring, timely wound assessment, and interdisciplinary communication are essential components of NPWT management to promote optimal wound healing outcomes. The following considerations aid in a better judgment.


  1. Wound Characteristics: The size, depth, and complexity of the wound significantly influence the duration of NPWT treatment. Large, deep, or chronic wounds may require more sessions compared to smaller, acute wounds.
  2. Underlying Conditions: Patients with underlying health conditions such as diabetes, vascular diseases, or immunocompromised states may experience delayed wound healing and may require an extended course of NPWT sessions.
  3. Patient Compliance and Response: Patient compliance with NPWT instructions, including dressing changes, activity restrictions, and overall wound care, can impact treatment outcomes. Additionally, individual patient response to NPWT varies, with some individuals experiencing accelerated healing while others may require more time.
  4. Wound Progression: Regular monitoring of wound progression is essential to assess the effectiveness of NPWT and make necessary adjustments to the treatment plan. Improvement in wound characteristics, such as reduction in size, granulation tissue formation, and decreased exudate, may indicate healing progress and guide decision-making regarding the continuation or discontinuation of NPWT sessions.
  5. Multidisciplinary Approach: Collaboration among healthcare professionals, including wound care specialists, nurses, and physicians, is crucial for optimizing NPWT outcomes and determining the appropriate duration of treatment based on individual patient needs and clinical assessment.

Handling a tube blockade in NPWT (Negative Pressure Wound Therapy) requires prompt identification and appropriate intervention to prevent treatment interruption and potential complications. The following parameters help in better handling of the situation:

  1. Recognition: Early recognition of a tube blockade is crucial for timely intervention. Monitor the NPWT system regularly for any signs of decreased or absent suction, abnormal noises, or alarms indicating pump malfunction.
  2. Assessment: Identify the location and cause of the tube blockade by carefully inspecting the tubing system, including the tubing connections, wound dressing, and any obstructions along the pathway.
  3. Troubleshooting: Attempt to clear the tube blockade using troubleshooting techniques recommended like gentle flushing of the tubing with sterile saline solution to dislodge debris or clots and manually checking for kinks or bends in the tubing.
  4. Dressing Evaluation: Assess the wound dressing for any accumulation of exudate, blood clots, or debris that may be obstructing the tubing. Carefully remove the dressing layers while minimizing disruption to the wound bed to visualize and address any blockages.
  5. Tube Replacement: If the tube blockade cannot be resolved through troubleshooting or if the tubing is damaged, consider replacing the affected tubing components with new, sterile tubing to restore proper suction and prevent contamination.
  6. Documentation and Communication: Document the occurrence of the tube blockade, interventions performed, and patient response in the medical record. Communicate any significant findings or concerns with the healthcare team to ensure coordinated care and follow-up.
  7. Preventive Measures: Implement preventive measures to minimize the risk of tube blockades in the future, such as regular inspection of the NPWT system, proper dressing application techniques, and patient education on signs and symptoms of complications.

Maintaining a consistent schedule for NPWT (Negative Pressure Wound Therapy) sessions is recommended for optimal wound healing outcomes. However, timing between sessions varies based on clinical factors, wound characteristics, and patient needs. Considerations include ongoing clinical assessment, wound severity, treatment goals, patient factors, and multidisciplinary collaboration. While consistency is preferred, occasional time gaps between sessions may be acceptable if clinical goals are met, wound progress is monitored closely, and adjustments are made as needed. Communication among healthcare providers and evaluation of patient response are crucial for determining the best timing and frequency of NPWT sessions.

The Smart Drain (SD) tube and the Canister provided by Capture Meditech are single-use only. They are not meant for reuse even for the same patient. For every new dressing they are to be changed along with the PU foam to prevent any cross-contamination.

Promptly identifying and addressing leaks during NPWT, healthcare providers can help maintain treatment efficacy, promote wound healing, and optimize patient outcomes. Regular monitoring, timely interventions, and adherence to best practices are essential in handling leaks and ensuring the success of NPWT therapy.  Here's a short note on how to handle a leak:

  1. Immediate Assessment: Identify the source and location of the leak promptly. Check the entire NPWT system, including the dressing, tubing, and connections, for any visible damage, disconnection, or improper sealing.
  2. Address Dressing Issues: Examine the wound dressing for any gaps, folds, or improper sealing. If the leak is coming from the dressing site, carefully reapply or reinforce the dressing, ensuring a proper seal around the wound to prevent air leaks.
  3. Inspect Tubing and Connections: Check the tubing and connections for any kinks, twists, or disconnections. Ensure that all connections are securely fastened and airtight. If there are visible issues, correct them by adjusting or replacing the affected components.
  4. Evaluate Dressing Changes: If a dressing change is necessary, follow proper aseptic technique. Remove the existing dressing, clean the wound, and apply a new dressing with meticulous attention to sealing any potential leakage points.
  5. Consider Replacement of Components: If the leak persists and cannot be resolved through adjustments, consider replacing the affected NPWT components, such as tubing or connectors, with new, sterile ones. Damaged or compromised components may lead to ongoing leaks.
  6. Monitor Suction Levels: After addressing the leak, monitor the NPWT system to ensure that negative pressure is restored and maintained at the prescribed levels. Confirm that the system is functioning optimally before continuing with the treatment.