Abstract

Introduction of negative pressure wound therapy (NPWT) revolutionized the conception of wound healing. Currently, there are an increased number of studies confirmed the high efficiency of this therapy in many clinical scenarios. Moreover, some innovations have been introduced in recent years to improve the management of complex and chronic wound.NPWT with instillation (NPWTi) combines traditional NPWT with application of topical irrigation solutions within bed of the wound. Bioburden reduction, decrease time to wound closure, promotion in granulation tissue formation, fewer operative visits have been revealed using NPWTi compared to standard NPWT.However, there are still some questioned aspect of the NPWTi and thus its superiority over standard NPWT has not been fully indicated. Moreover, based on current studies no firm conclusions have been taken concerning the type of instilled solution preferably used, range of dwell- time phase, range of negative pressure and others.The main goal of the publication is to overview and summarize the current state of art concerning NPWTi. Moreover, mechanisms of action, review of the most common used instilled solution are discussed and clinical evidence of NPWTi are described.

Highlights

  • Introduction of negative pressure wound therapy (NPWT) revolutionized the conception of wound healing

  • We focused on the current state of art regarding NPWT with instillation (NPWTi): present indications, types of administered instilled solutions and potential problems with the utility of NPWTi were highlighted

  • Lavasept R was used as an instilled fluid with the following settings: 20 seconds of instillation with 20-minute dwell time followed by NPWT at -125 mmHg

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Summary

MECHANISM OF ACTION

The mechanism of action for NPWTi remains the same in regards to the standard NPWT and is the basis for successful outcomes of NPWTi. The applied negative pressure within the surgical wound indicates its multi-dimensional action that positively influences the wound healing process. The increase of local blood flow influences an enhanced collagen synthesis and promotes mechanisms that stimulate angiogenesis. NPWTi leads to a decreased local tissue edema, lowers the number of bacteria within the wound and removes inhibitory agents. The use of NPWT positively affects tissue granulation process and maintains a moist wound environment. NPWT reduces lateral tension of the wound edge, positively influences the wound contraction and supports a proper wound edge vascularity.[8,9,10]

CELLULAR AND MOLECULAR CHANGES
BIOFILM
TISSUE GRANULATION
WOUND DRESSINGS
CONTINUOUS- VERSUS PERIODIC- INSTILLATION
VIII. INSTILLATION SOLUTIONS
Isotonic solutions
Hypochlorite-based solutions
Biguanidines
Silver nitrate
Povidone-iodine solution
Insulin
CLINICAL INDICATIONS
CONTRAINDICATIONS AND WARNINGS
Findings
CONCLUSIONS
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