Closed-incision negative-pressure therapy in high-risk general surgery patients following laparotomy: a retrospective study

Evaluation of Negative Pressure Dressings for Closed Surgical Incisions in Decreasing Surgical Site Infections After Emergency Laparotomy: A Randomized Controlled Study

Objectives The aim of this study is to compare the effectiveness of negative pressure dressings (NPDs) versus conventional dressings for closed surgical incisions after emergency midline laparotomy, focusing on their impact on surgical site infection (SSI) rates, wound dehiscence, hospital stay duration, and cosmetic outcomes. Methods The randomized controlled study was conducted over 24 months, involving 80 patients aged 18-65 years who had peritonitis and underwent emergency midline laparotomies. Patients with diabetes mellitus, a BMI >35 kg/m², immunocompromised conditions, or those requiring re-exploration within 30 days of surgery were excluded. The participants were randomly assigned into two groups using a computer-generated randomization table: Group A, the case group, consisted of 40 patients who received NPDs, while Group B, the control group, included 40 patients who received conventional dressings. Data were recorded in Microsoft Excel (Microsoft Corporation, Redmond, WA, USA) and analyzed using IBM SPSS Statistics for Windows, Version 25.0 (Released 2017; IBM Corp., Armonk, NY, USA), with a p-value of <0.05 considered statistically significant. Results The overall occurrence of SSIs within the 30-day follow-up period was significantly lower in the NPD group compared to the conventional dressing group (30% vs. 70%, p < 0.05). The mean duration of hospital stay was 14.85 ± 10.43 days for the NPD group and 15.4 ± 9.75 days for the control group, with no statistically significant difference (p = 0.712). The mean Vancouver Scar Scale score was 5.3 ± 2.47 in the NPD group and 6.5 ± 2.14 in the control group, also showing no statistically significant difference (p = 0.11). Conclusions NPDs significantly reduced the incidence of SSIs compared to conventional dressings, but they did not have a significant impact on scar cosmesis or the duration of hospital stay.

Enhancing Healing Strategies: Negative-Pressure Wound Therapy and Delayed Primary Closure in Abdominal Wounds Post-emergency Laparotomy for Intestinal Perforation

Background Intestinal perforation is a life-threatening condition requiring immediate surgical intervention. Surgical-site infections (SSIs) and wound dehiscence are common complications associated with emergency laparotomy for intestinal perforation. Finding optimal wound management and postoperative strategies can significantly impact patient outcomes and reduce the risk of complications. Negative-pressure wound therapy (NPWT) is a relatively recent tool employed in the care of wounds to control SSIs and foster healing. Methodology A prospective, observational, cohort study was conducted among 150 patients who underwent emergency exploratory laparotomy due to intestinal perforation at the general surgery department of a tertiary care hospital in New Delhi between July 2022 and December 2023. Preoperatively, all patients underwent initial resuscitation. Intraoperatively, the extent of peritonitis was determined and was categorized according to the Centers for Disease Control and Prevention (CDC) classification. Postoperatively, NPWT dressing was applied to the patient's midline laparotomy wound on postoperative day (POD) two. Negative pressure was set at 75-125 mmHg with suction. The number of NPWT dressing changes required was documented. The wound was closed with vertical mattress sutures under local anesthesia, delayed primary closure (DPC). The incidence of SSIs, the duration for DPC, the incidence of fascial dehiscence, the number of NPWT dressing changes, and the length of hospital stay were documented according to CDC groups. Results The mean age in CDC categories 2, 3, and 4 were 31.789, 28.733, and 42.676 years, respectively. The most common cause of perforation was enteric fever (n = 42, 28%), followed by tuberculosis (n = 36, 24%). Most patients had no known comorbidities (n = 80, 53.3%). Overall, 16% of patients (n = 24) were both alcoholics and smokers. The most frequent bacteria in all CDC categories was Escherichia coli. Fourteen patients developed burst abdomen in the postoperative period and were excluded from the study. The mean duration of DPC increased with higher CDC categories, with CDC category 4 displaying the most extended mean duration at 10.70 days. The number of NPWT dressing changes increases with higher CDC categories, with CDC category 4 exhibiting the highest mean at 2.00 changes. The mean hospital stay increased with higher CDC categories, with CDC category 4 showing the most extended mean stay at 17.324 days. Statistical analysis revealed no significant association between SSI occurrence and CDC categories. Conclusions NPWT followed by DPC is a promising approach to managing gastrointestinal perforations, reducing SSIs, and potentially improving patient outcomes. However, further research is needed to explore the specific benefits of NPWT in conjunction with DPC and its efficacy in various clinical scenarios.

Closed-incision negative-pressure wound therapy reduces superficial surgical site infections after open colon surgery: an NSQIP Colectomy Study

BACKGROUND

The use of closed-incision negative-pressure wound therapy (iNPWT) has increased in the last decade across surgical fields, including colectomy.

AIM

To compare postoperative outcomes associated with use of iNPWT following open colectomy from a large national database.

METHODS

A retrospective review of patients who underwent operations from 2015 to 2020 was performed using the National Surgical Quality Improvement Program (NSQIP) Targeted Colectomy Database. Intraoperative placement of iNPWT was identified in patients undergoing open abdominal operations with closure of all wound layers including skin. Propensity score matching was performed to define a control group who underwent closure of all wound layers without iNPWT. Patients were matched in a 1:4 (iNPWT vs control) ratio and postoperative rates of superficial, deep and organ-space surgical site infection (SSI), wound disruption, and readmission.

FINDINGS

A matched cohort of 1884 was selected. Patients with iNPWT had longer median operative time (170 (interquartile range: 129-232) vs 161 (114-226) min; P<0.05). Compared to patients without iNPWT, patients with iNPWT experienced a lower rate of 30-day superficial incisional SSI (3% vs 7%; P<0.05) and readmissions (10% vs 14%; P<0.05). iNPWT did not decrease risk of deep SSI, organ-space SSI, or wound disruption.

CONCLUSION

Although there is a slightly increased operative time, utilization of iNPWT in open colectomy is associated with lower odds of superficial SSI and 30-day readmission. This suggests that iNPWT should be routinely utilized in open colon surgery to improve patient outcomes.

Influence of Closed-incision Negative Pressure Wound Therapy on Abdominal Site Complications in Autologous Breast Reconstruction

Background

Closed-incision negative pressure wound therapy (ciNPWT) has shown promise in reducing surgical wound complications. Among its numerous benefits, it allows for exudate management and tension offloading from wound edges. The purpose of this systematic review and meta-analysis was to assess the efficacy of prophylactic ciNPWT versus conventional dressings on abdominal donor site complications in microsurgical breast reconstruction (MR).

Methods

A systematic review was conducted according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines in January 2023. PubMed and Embase were searched to identify all relevant studies. Data collected included rates of total wound complications, wound dehiscence, infection, seroma, and length of hospital stay.

Results

A total of 202 articles were screened, and eight studies (1009 patients) met the inclusion criteria. Use of ciNPWT was associated with a significantly lower rate of wound dehiscence (OR, 0.53; 95% confidence interval, 0.33-0.85; P = 0.0085, I2 = 0%). There was no significant difference in the rate of total wound complications [odds ratio (OR), 0.63; 95% CI, 0.35-1.14; P = 0.12, I2 = 69%], donor site infection (OR, 0.91; 95% CI, 0.42-1.50; P = 0.47, I2 = 13%), seroma (OR, 0.74; 95% CI, 0.22-2.49; P = 0.63, I2 = 57%), or length of hospital stay (SMD, 0.089; 95% CI, -0.13-0.35; P = 0.37, I2 = 29%).

Conclusions

Although exudate management by ciNPWT fails to reduce surgical site infection, seroma formation, and overall length of stay, ciNPWT tension offloading properties seem to be associated with lower rates of wound dehiscence when compared with conventional dressings in abdominal-based autologous breast reconstruction.

The effectiveness of negative-pressure wound therapy for wound healing after stoma reversal: a randomized control study

Purpose

The purse-string closure (PSC) method is used for skin closure after stoma reversal to reduce surgical site infections (SSIs). However, PSC requires a longer healing period than primary closure. The application of negative-pressure wound therapy (NPWT) may reduce the healing period of many wound types. This study aimed to investigate whether the application of NPWT promotes wound healing after the PSC method for stoma reversal.

Methods

This study was a randomized controlled study. Patients who had undergone stoma reversal surgery were randomized to receive NPWT or simple dressing after surgery. The primary outcome was a complete wound-healing period. We also investigated SSI, hospital stay, total cost, and the patient and observer scar assessment scale (POSAS) as secondary outcomes.

Results

A total of 36 patients were randomized into 2 groups. The median wound healing period was shorter in the NPWT group than in the control group (17.5 days [range, 11-24 days] vs. 21.5 days [range, 14-41 days], P = 0.006). SSI rate and hospital stay did not differ between the groups. However, the number of dressings was lower in the NPWT group than in the control group (5 [range, 3-7] vs. 17 [range, 10-30], P < 0.001). The total cost for dressing was comparable between the groups. The POSAS was not different between the groups.

Conclusion

This study revealed that NPWT application after PSC for stoma reversal site is effective in reducing the wound healing period compared to simple dressing, without increasing SSI and total cost.

Effectiveness of 3-Day Prophylactic Negative Pressure Wound Therapy on Closed Abdominal Incisions in the Prevention of Wound Complications: A Randomized Controlled Trial

OBJECTIVE

To determine the impact of negative pressure wound therapy of closed abdominal incisions on wound complications.

BACKGROUND

Surgical wound complications including surgical site infection complicating open abdominal operations are a burden on the economy. The outcomes of SSI include prolonged hospital stays, adjuvant treatment delay, and incisional hernias leading to a decrease in the quality of life. Prophylactic negative pressure wound therapy has recently been tried with promising results.

METHODS

A randomized controlled trial involving 140 patients post-laparotomy with primary wound closure was divided into 2 groups (70 patients each). For the first group, NPWT dressings were applied for the first 3 days and then conventional dressings for 4 days after. For the second group, conventional dressings were applied for 7 days. Patients were followed up for SSI, seroma, wound dehiscence, and hospital stay.

RESULTS

pNPWT was associated with a significantly lower rate of SSI development compared with gauze dressings (3/70 vs. 17/70) (p = 0.001). It also had a significant effect on lowering the incidence of seroma (0/70 vs. 7/70) (p = 0.007) and delayed wound healing (0/70 vs. 8/70) (p = 0.006) and on decreasing days of hospital stay (2.2 ± 0.6 vs. 3.5 ± 1.8) (p <0.00001). No significant difference was observed with regard to hematoma (0/70 vs. 1/70) (p = 0.5) or wound dehiscence (0/70 vs. 2/70) (p = 0.5). No burst abdomens or NPWT complications were recorded in our study.

CONCLUSION

Three-day NPWT applied to primarily closed incisions is effective in reducing the incidence of SSI, seroma, and delayed wound healing in abdominal operations compared to conventional gauze dressings.

Prophylactic use of incisional negative pressure wound therapy for the prevention of surgical site occurrences in general surgery: Consensus document

BACKGROUND

Surgical site occurrences pose a threat to patient health, potentially resulting in significant increases in health care spending caused by using additional resources. The objective of this study was to reach a consensus among a group of experts in incisional negative pressure wound therapy to determine the indications for using this type of treatment prophylactically and to analyze the associated risk factors of surgical site occurrences in abdominal surgery.

METHODS

A group of experts in incisional negative pressure wound therapy from Spain and Portugal was formed among general surgery specialists who frequently perform colorectal, esophagogastric, or abdominal wall surgery. The Coordinating Committee performed a bibliographic search to identify the most relevant publications and to create a summary table to serve as a decision-making protocol regarding the use of prophylactic incisional negative pressure wound therapy based on factors related to the patient and type of procedure.

RESULTS

The patient risk factors associated with surgical site occurrence development such as age, immunosuppression, anticoagulation, hypoalbuminemia, smoking, American Society of Anesthesiologists classification, diabetes, obesity, and malnutrition were analyzed. For surgical procedure factors, surgical time, repeated surgeries, organ transplantation, need for blood transfusion, complex abdominal wall reconstruction, surgery at a contaminated site, open abdomen closure, emergency surgery, and hyperthermic intraperitoneal chemotherapy were analyzed.

CONCLUSION

In our experience, this consensus has been achieved on a tailored set of recommendations on patient and surgical aspects that should be considered to reduce the risk of surgical site occurrences with the use of prophylactic incisional negative pressure wound therapy, particularly in areas where the evidence base is controversial or lacking.

Closed Incision Negative Pressure Therapy versus Standard of Care in Reduction of Surgical Site Complications: A Systematic Review and Meta-analysis

Closed incision negative pressure therapy (ciNPT) has been utilized to help manage closed incisions across many surgical specialties. This systematic review and meta-analysis evaluated the effect of ciNPT on postsurgical and health economic outcomes.

Methods

A systematic literature search using PubMed, EMBASE, and QUOSA was performed for publications written in English, comparing ciNPT to standard-of-care dressings between January 2005 and August 2021. Study participant characteristics, surgical procedure, dressings used, treatment duration, postsurgical outcomes, and follow-up data were extracted. Meta-analyses were performed using random-effects models. Risk ratios summarized dichotomous outcomes. Difference in means or standardized difference in means was used to assess continuous variables reported on the same scale or outcomes reported on different scales/measurement instruments.

Results

The literature search identified 84 studies for analysis. Significant reductions in surgical site complication (SSC), surgical site infection (SSI), superficial SSI, deep SSI, seroma, dehiscence, skin necrosis, and prolonged incisional drainage were associated with ciNPT use (P < 0.05). Reduced readmissions and reoperations were significant in favor of ciNPT (P < 0.05). Patients receiving ciNPT had a 0.9-day shorter hospital stay (P < 0.0001). Differences in postoperative pain scores and reported amounts of opioid usage were significant in favor of ciNPT use (P < 0.05). Scar evaluations demonstrated improved scarring in favor of ciNPT (P < 0.05).

Discussion

For these meta-analyses, ciNPT use was associated with statistically significant reduction in SSCs, SSIs, seroma, dehiscence, and skin necrosis incidence. Reduced readmissions, reoperation, length of hospital stay, decreased pain scores and opioid use, and improved scarring were also observed in ciNPT patients.

The Application of Double-Layer-Vacuum-Assisted Closure Therapy With Flap Repair of Soft Tissue Defects Near the Eyes or EarDL-VAC Therapy

OBJECTIVE

We aimed to introduce and evaluate the safety of double-layer-vacuum-assisted closure (DL-VAC) therapy with flap repair of the wound near the eyes or ears.

METHODS

This study is case reports of 2 patients who underwent DL-VAC therapy for tissue defects near the eyes or ears. The detailed process of the DL-VAC therapy is carefully described in this study. The postoperative wound healing process was closely observed. The biggest concern was the treatment outcome of DL-VAC therapy on the eyes and ears.

RESULTS

Two patients underwent DL-VAC therapy due to their soft tissue defects close to the eyes or ears. Both patients achieved primary wound healing and the flaps survived during the follow-up period, which ranged from 1 to 24 months. Patients did not receive any dressing change until the VAC device was removed on the 5th to 7th postoperative day. No severe complications appeared and the patients were satisfied with both appearance and function.

CONCLUSIONS

Double-layer-vacuum-assisted closure therapy is an effective and safe option for the treatment of wounds near the eyes and ears.

Prevention of incisional surgical site infection by subfascial closed suction drainage after open laparotomy: a single surgeon experience in 250 consecutive patients

BACKGROUND

Open laparotomy with gastroenterological surgery is a surgical procedure results in a relatively high rate (about 10% or more) of incisional surgical site infection (SSI). To reduce incisional SSI after open laparotomy, mechanical preventors, such as subcutaneous wound drainage or negative-pressure wound therapy (NPWT), have been tried; however, conclusive results have not been obtained. This study evaluated the prevention of incisional SSI by first subfascial closed suction drainage after open laparotomy.

METHODS

A total of 453 consecutive patients who underwent open laparotomy with gastroenterological surgery by one surgeon in one hospital (between August 1, 2011, and August 31, 2022) was investigated. Same absorbable threads and ring drapes were used in this period. Subfascial drainage was used in consecutive 250 patients in the later period (between January 1, 2016, and August 31, 2022). The incidences of SSIs in the subfascial drainage group were compared to those of in the no subfascial drainage group.

RESULTS

(a) No incisional SSI (superficial and deep) occurred in the subfascial drainage group (superficial = 0% [0/250] and deep = 0% [0/250]). As a result, incidences of incisional SSI of the subfascial drainage group were significantly lower than those of the no subfascial drainage group (superficial = 8.9% [18/203]; deep = 3.4% [7/203]) (p < 0.001 and p = 0.003, respectively). (b) Four out of seven deep incisional SSI patients in the no subfascial drainage group underwent debridement and re-suture under lumbar or general anesthesia. (c) There was no significant difference in the incidences of organ/space SSI of the two groups (3.4% [7/203] in the no subfascial drainage group and 5.2% [13/250] in the subfascial drainage group) (P = 0.491).

CONCLUSION

Subfascial drainage was associated with no incisional SSI after open laparotomy with gastroenterological surgery.

Does prophylactic negative pressure wound therapy prevent surgical site infection in abdominal surgery?

OBJECTIVE

To determine if prophylactic negative pressure wound therapy (pNPWT) allows for the prevention of surgical site infections (SSIs) in abdominal surgery.

METHOD

A non-systematic review assessing the evidence was conducted in 2020.

RESULTS

Retrospectve studies comparing patients with pNPWT with patients receiving standard wound dressing after abdominal surgery showed encouragning results in favour of pNPWT for reducing the incidence of SSIs, but randomised controlled trials have so far reported mixed results.

CONCLUSION

New randomised controlled trials including a sufficient number of patients at risk of SSIs are needed for confirming the results of non-interventional studies.

How Can Negative Pressure Wound Therapy Pay for Itself?-Reducing Complications Is Important

INTRODUCTION

Orthopaedic trauma demonstrates a relatively high rate of surgical site infections (SSI) as compared with other surgical specialties. SSIs provide significant clinical challenges and create significant health care costs. Incisional negative pressure wound therapy (iNPWT) has reduced the risk of SSI in orthopaedic surgery and other surgical specialties.

PURPOSE

The purpose of this study is to investigate potential cost savings with the use of iNPWT (3M Prevena Therapy, 3M, St. Paul, MN) in high-risk orthopaedic trauma patients with closed OTA/AO 41C and 43C fractures.

METHODS

This is a retrospective cohort study performed at a single, level-1 trauma center using data from a lower extremity fracture registry. Using the results from the registry and baseline infection rates derived from the literature, a health economic model was developed to evaluate the potential cost savings.

RESULTS

A total of 79 patients included in the registry underwent open reduction and internal fixation of OTA/AO 41C and 43C fractures. A total of 10.1% developed a SSI. For those who received iNPWT, the rate of SSI was 7.4%. A health economic model suggests that the use of iNPWT may reduce the costs per patient by approximately $1381 to $4436 per patient.

CONCLUSIONS

This health economic assessment and model suggests that judicious use of iNPWT may reduce health care costs in patients undergoing open reduction and internal fixation of OTA/AO 41C and 43C fractures.

LEVEL OF EVIDENCE

Economic Level IV.

"Closed Incision Negative Pressure Therapy (ciNPT) reduces abdominal donor site surgical wound dehiscence in Deep Internal Epigastric Perforator (DIEP) flap breast reconstructions: DEhiscence PREvention Study II (DEPRES II) - a Randomized Clinical Trial"

BACKGROUND

In breast reconstruction surgeries, surgical wound dehiscence is a serious complication which generates a significant burden on patients and healthcare systems. There are indications that postoperative treatment with closed incision negative pressure therapy (ciNPT) has been associated with reduced wound dehiscence rates. This randomized clinical trial examines the effect of ciNPT application on abdominal donor site surgical wound dehiscence in low- and high-risk patients undergoing a breast reconstruction with a deep internal epigastric perforator (DIEP) flap.

METHODS

Eighty eligible women, stratified as low- or high-risk patients, were included and were randomized for treatment with either ciNPT or adhesive strips (AS) by drawing sealed, opaque envelopes. All surgeons were kept blind for allocation. Primary outcomes were surgical wound dehiscence and surgical site infection at the abdominal donor site upon follow-up after 12 weeks. Secondary outcomes were seroma and hematoma formation. Five patients were excluded from the study due to non-sufficient exposure to the study treatment (n=4) or major protocol deviation (n=1).

RESULTS

A total of 75 women, low-risk (n=38) and high-risk (n=37), received either ciNPT (n=36) or AS (n=39). Patients' demographics did not differ significantly. Donor-site surgical wound dehiscence occurred in 23 patients; the Absolute Risk Reduction was statistically significant (21.6%, 95% Confidence Interval [1.5-41.7]). No statistically significant differences were found in surgical site infection or secondary outcomes.

CONCLUSIONS

In this randomized clinical trial, postoperative treatment with ciNPT decreased the incidence of surgical wound dehiscence at the abdominal donor site in low- and high-risk DIEP flap breast reconstruction patients.

Case control study investigating the clinical utility of NPWT in the perineal region following abdominoperineal resection for rectal adenocarcinoma: a single center study

Background

Perineal wound complications are common after abdominoperineal resection (APR) for rectal adenocarcinoma. Delayed wound healing may postpone postoperative adjuvant therapy and, therefore, lead to a worse survival rate. Negative-pressure wound therapy (NPWT) has been suggested to improve healing, but research on this subject is limited.

Methods

The aim of this study was to assess whether NPWT reduces surgical site infections (SSI) after APR for rectal adenocarcinoma when the closure is performed with a biological mesh and a local flap. A total of 21 consecutive patients had an NPWT device (Avelle, Convatec™) applied to the perineal wound. The study patients were compared to a historical cohort in a case–control setting in relation to age, body mass index, tumor stage, and length of neoadjuvant radiotherapy. The primary outcome was the surgical site infection rate. The secondary outcomes were the wound complication rate, the severity of wound complications measured by the Clavien–Dindo classification, length of hospital stay, and surgical revision rate.

Results

The SSI rate was 33% (7/21) in the NPWT group and 48% (10/21) in the control group, p = 0.55. The overall wound complication rate was 62% (13/21) in NPWT patients and 67% (14/21) in the control group, p > 0.90. The length of hospital stay was 15 days in the NPWT group and 13 in the control group, p = 0.34. The wound severity according to the Clavien–Dindo classification was 3b in 29% (6/21) of the NPWT group and in 38% (8/21) of the control group. A surgical revision had to be performed in 29% (6/21) of the cases in the NPWT group and 38% (8/21) in the control group, p = 0.73.

Conclusion

NPWT did not statistically decrease surgical site infections or reduce wound complication severity in perineal wounds after APR in this case–control study. The results may be explained by technical difficulties in applying NPWT in the perineum, especially in female patients. NPWT devices should be further developed to suit the perineal anatomy before their full effect can be assessed.

Trial registration The study was registered as a prospective registry study (266/2018, registered 15th of November 2018)

Simple and Efficient Pressure Ulcer Reconstruction via Primary Closure Combined with Closed-Incision Negative Pressure Wound Therapy (CiNPWT)—Experience of a Single Surgeon

Background: In this study, we aimed to analyze the clinical efficacy of closed-incision negative pressure wound therapy (CiNPWT) when combined with primary closure (PC) in a patient with pressure ulcers, based on one single surgeon’s experience at our medical center. Methods: We retrospectively reviewed the data of patients with stage III or IV pressure ulcers who underwent reconstruction surgery. Patient characteristics, including age, sex, cause and location of defect, comorbidities, lesion size, wound reconstruction methods, operation time, debridement times, application of CiNPWT to reconstructed wounds, duration of hospital stay, and wound complications were analyzed. Results: Operation time (38.16 ± 14.02 vs. 84.73 ± 48.55 min) and duration of hospitalization (36.78 ± 26.92 vs. 56.70 ± 58.43 days) were shorter in the PC + CiNPWT group than in the traditional group. The frequency of debridement (2.13 ± 0.98 vs. 2.76 ± 2.20 times) was also lower in the PC + CiNPWT group than in the traditional group. The average reconstructed wound size did not significantly differ between the groups (63.47 ± 42.70 vs. 62.85 ± 49.94 cm²), and there were no significant differences in wound healing (81.25% vs. 75.38%), minor complications (18.75% vs. 21.54%), major complications (0% vs. 3.85%), or mortality (6.25% vs. 10.00%) between the groups. Conclusions: Our findings indicate that PC combined with CiNPWT represents an alternative reconstruction option for patients with pressure ulcers, especially in those for whom prolonged anesthesia is unsuitable.

Prophylactic Negative-pressure Wound Therapy Prevents Surgical Site Infection in Abdominal Surgery: An Updated Systematic Review and Meta-analysis of Randomized Controlled Trials and Observational Studies

BACKGROUND

Prevention of surgical site infection (SSI) is a public health challenge. Our objective was to determine if prophylactic negative-pressure wound therapy (pNPWT) allows preventing SSI after laparotomy.

METHODS

Medline, Embase, and Web of Science were searched on 6 October 2019 for original studies reporting the incidences of SSI in patients undergoing open abdominal surgery with and without pNPWT. Risk differences (RDs) between control and pNPWT patients and risk ratios (RRs) for SSI were obtained using random-effects models.

RESULTS

Twenty-one studies (2930 patients, 5 randomized controlled trials [RCTs], 16 observational studies) were retained for the analysis. Pooled RD between patients with and without pNPWT was -12% (95% confidence interval [CI], -17% to -8%; I2 = 57%; P < .00001) in favor of pNPWT. That risk difference was -12% (95% CI, -22% to -1%; I2 = 69%; P = .03) when pooling only RCTs (792 patients). pNPWT was protective against the incidence of SSI with a RR of 0.53 (95% CI, .40-.71; I2 = 56%; P < .0001). The effect on pNPWT was more pronounced in studies with an incidence of SSI ≥20% in the control arm. The preventive effect of pNPWT on SSI remained after correction for potential publication bias. However, when pooling only high-quality observational studies (642 patients) or RCTs (527 patients), significance was lost.

CONCLUSIONS

Existing studies suggest that pNPWT on closed wounds is protective against the occurrence of SSI in abdominal surgery, but these findings need to be confirmed by more high-quality evidence, preferentially in subgroups of patients with an incidence of SSI ≥20% in the control arm.

Prophylactic Single-use Negative Pressure Dressing in Closed Surgical Wounds After Incisional Hernia Repair: A Randomized, Controlled Trial

OBJECTIVE

A randomized controlled trial (RCT) was undertaken to evaluate whether the prophylactic application of a specific single-use negative pressure (sNPWT) dressing on closed surgical incisions after incisional hernia (IH) repair decreases the risk of surgical site occurrences (SSOs) and the length of stay.

BACKGROUND

The sNPWT dressings have been associated to several advantages like cost savings and prevention of SSOs like seroma, hematoma, dehiscence, or wound infection (SSI) in closed surgical incisions. But this beneficious effect has not been previously studied in cases of close wounds after abdominal wall hernia repairs.

METHODS

An RCT was undertaken between May 2017 and January 2020 (ClinicalTrials.gov registration number NCT03576222). Participating patients, with IH type W2 or W3 according to European Hernia Society classification, were randomly assigned to receive intraoperatively either the sNPWT (PICO)(72 patients) or a conventional dressing at the end of the hernia repair (74 patients). The primary endpoint was the development of SSOs during the first 30 days after hernia repair. The secondary endpoint included length of hospital stay. Statistical analysis was performed using IBM SPSS Statistics Version 23.0.

RESULTS

At 30 days postoperatively, there was significatively higher incidence of SSOs in the control group compared to the treatment group (29.8% vs 16.6%, P < 0.042). There was no SSI in the treatment group and 6 cases in the control group (0% vs 8%, P < 0.002). No significant differences regarding seroma, hematoma, wound dehiscence, and length of stay were observed between the groups.

CONCLUSION

The use of prophylactic sNPWT PICO dressing for closed surgical incisions following IH repair reduces significatively the overall incidence of SSOs and the SSI at 30 days postoperatively.

Expanded negative pressure wound therapy in healing diabetic foot ulcers: a prospective randomised study

OBJECTIVE

This study aims to evaluate the benefits of treating diabetic foot ulcers (DFU) through a revised procedure using the mechanisms underlying negative pressure wound therapy (NPWT) in such a way as to achieve reduced and more evenly distributed lateral tension lines across the wound.

METHOD

Patients with type 2 diabetes were assessed for elegibility. Included patients were divided randomly into two groups: the NPWT control group and the NPWT+ group. Patients in the NPWT control group were treated in the traditional manner: wounds were covered with foams shaped to fit the wound precisely. In the NPWT+ group, foams were shaped to fit the wound precisely, and an additional foam was then wrapped around the foot.

RESULTS

Some 85 patients were assessed for eligibility; 59 were randomised into two groups: 29 patients in the NPWT+ group and 30 patients in the NPWT group. The primary objective was median healing time (NPWT+ 19 days, interquartile ratio (IQR) 7.5; NPWT 33 days, IQR 16; p<0.00001), and complete wound healing at three weeks (NPWT+ 55.20% NPWT 26.70% p=0.02). Secondary endpoints included number of major amputations (none in either group) and number of infections (NPWT+ 3.44% of patients, NPWT 6.66% of patients; p=0.57).

CONCLUSION

Our initial findings show that this treatment significantly reduced wound closure times and accelerated healing in DFUs. It also demonstrated promising improvements in healing rates, with no significant increase in wound complications.

Comparison of closed incision negative pressure wound therapy with conventional dressing for reducing wound complications in emergency laparotomy

OBJECTIVE

The aim of this study was to compare the post-operative effects of closed incision negative pressure wound therapy with conventional dressing in emergency laparotomy.

METHODS

This study was conducted from 1st November 2018 to 31st March 2020 in ABVIMS &amp; Dr. R.M.L. Hospital, New Delhi. The potential candidates for the study were patients of 18 years and above who were admitted in surgical emergency and underwent emergency laparotomy by a midline incision. Fifty random patients were alternatively allotted to group A (25 patients) and group B (25 patients). In the patients of group A, closed incision negative pressure wound therapy (ciNPWT) was applied on midline closed wound after an exploratory laparotomy procedure. The patients in group B, standard dry gauze dressing was done.

RESULTS

The mean age of patients in group A and group B were 46.76±12.20 and 41.96±8.33 years, respectively (p-value-0.11). The wound infection was present in 12% of cases in group A and 32% in group B, but when we calculate the p-value, it was found to be statistically non-significant (p-value-0.08). Similarly, seroma formation and wound dehiscence were found less in group A as compared to group B but not reached up to a statistically significant limit (p-value 0.55 and 0.38 respectively). The frequency of dressing change was 1-2 per week in 92% of cases in group A while it was 3-4 per week in 68% of cases in group B. The mean time of the frequency of dressing change was 1.24±0.72 per week and 4.28±1.90 per week in both the groups respectively (p-value &lt;0.001). There was no significant (p&gt;0.05) difference in the duration of hospital stay between group A (mean hospital stay 8.20±2.34 days) and group B (mean hospital stay 8.21±3.37 days).

CONCLUSION

Closed incision negative pressure wound therapy has no advantages over conventional dressing in terms of post-operative complications and hospital stay. However, it reduces the frequency of dressing change significantly, which reduces the mental stress of the patient and the burden of changing daily dressing.

Vacuum-Assisted Incisional Closure Therapy After Groin Reconstruction With Muscle Flap

Background

Groin reconstruction with muscle flap coverage is associated with high wound complication rates. Incisional vacuum-assisted closure (iVAC) therapy may lower wound complications. We evaluated the impact of iVAC on postoperative outcomes in patients following groin reconstruction with muscle flap coverage.

Methods

We conducted a retrospective review of patients who underwent groin reconstruction with muscle flap coverage in 2012-2018. Patients were divided into those who received iVAC therapy and those who received standard sterile dressings (SSD).

Results

Of the 57 patients included, most received iVAC therapy (71%, n = 41) and the rest received SSD (28%, n = 16). The iVAC group had higher rates of diabetes, hypertension, coronary artery disease, and peripheral artery disease (p < 0.05). However, iVAC patients had comparable length of hospital stay (12 vs 8.5 days p = 0.0735), reoperations (34% vs 31%, p = 0.8415), and readmissions (32% vs 37%, p = 0.6801) with SSD patients. iVAC placement was less likely in prophylactic flaps (odds ratio 0.08, p = 0.0049).

Conclusion

Patients with a prophylactic flap were less likely to receive vacuum therapy, which may highlight a selection bias where surgeons pre-emptively use iVAC therapy in surgical candidates identified as high risk. The pre-emptive use of iVAC may minimize adverse postoperative outcomes in high-risk patients.

Prophylactic Use of Negative Pressure Therapy in General Abdominal Surgery: A Systematic Review and Meta-Analysis

Background: Surgical site infections (SSIs) represent an economic burden to healthcare systems. The use of negative pressure wound therapy (NPWT) for SSI prophylaxis remains uncertain. Methods: A systematic literature search was conducted in Medline/PubMed, CINAHL, and Web of Science for relevant studies. The primary outcome was the evaluation of the effectiveness of NPWT for prophylaxis of SSI rates in general abdominal surgery. Secondary outcomes were rates of seroma and wound dehiscence, length of hospital stay, and re-admission rates. The statistical analysis was performed with random effect models. Results: A total of 3,193 patients from 20 articles (six randomized controlled trials [RCT], three prospective, eight retrospective, and three ambispective studies) were analyzed. Negative pressure wound therapy was associated with decreased rate of SSIs compared with standard dressing in a pooled analysis of non-randomized studies and RCTs (0.57; 95% confidence interval [CI], -0.4 to 0.8; p < 0.001). This result, however, needs to be challenged because of a significant statistical heterogeneity of the included studies (I² = 71%; p < 0.01). A separate analysis of the six RCTs failed to confirm the superiority of NPWT (0.64; 95% CI, -0.4 to 1.04; p = 0.07), also disclosing significant heterogeneity. The analysis of secondary outcomes was only possible in combination of randomized and non-randomized studies because of incomplete datasets in RCTs. Re-admission rates were lower after NPWT and no difference was observed for the incidence of seroma, wound dehiscence, and length of hospital stay. Conclusions: Based on available evidence, the routine use of NPWT for SSI prophylaxis after laparotomy in general abdominal surgery cannot be generally recommended.

Surgical wound infection prevention using topical negative pressure therapy on closed abdominal incisions - the 'SWIPE IT' randomized clinical trial

BACKGROUND

Surgical site infections (SSIs) are the most common cause of healthcare-associated infections in surgical patients. It is unclear whether incisional negative pressure wound therapy (NPWT) can reduce the risk of SSIs in patients after open abdominal surgery.

METHODS

A prospective, non-blinded multi-centre randomized controlled trial (RCT) was performed to evaluate the incidence of SSI post-laparotomy using incisional NPWT compared with a standard dressing. The primary outcome was the rate of superficial SSI.

RESULTS

A total of 124 patients (61 patients in the NPWT arm and 63 patients in the control arm) were included. One hundred and nine (87.9%) patients underwent colorectal surgery; 61 patients (49.2%) had emergency surgery. There were more superficial SSIs in the control group than in the NPWT group, although not statistically significant (20.6% vs 9.8%, P=0.1). Upon multiple logistic regression analysis, control dressings were associated with increased risk of superficial SSI although again, not statistically significant (odds ratio (OR) 2.41, 95% confidence interval (CI) 0.81-7.17, P=0.11). There was no superficial non-SSI related wound dehiscence in the NPWT group compared with 9.5% in the control group (P=0.03). There was no difference in postoperative complications (P=0.15), nor in other wound complications (P=0.79).

CONCLUSION

NPWT was not associated with decreased superficial SSI in this RCT. However, there was a statistically significant reduction in superficial wound dehiscence with NWPT dressings. The results of this study should be included in meta-analyses for better evaluation of NPWT on closed abdominal incisions.

Use of prophylactic closed incision negative pressure therapy is associated with reduced surgical site infections in gynecologic oncology patients undergoing laparotomy

BACKGROUND

Surgical site infection after surgery for gynecologic cancer increases morbidity. Prophylactic closed incision negative pressure therapy has shown promise in reducing infectious wound complications across many surgical disciplines.

OBJECTIVE

This study aimed to determine whether closed incision negative pressure therapy is associated with reduced surgical site infections in gynecologic oncology patients undergoing laparotomy compared with standard dressings.

STUDY DESIGN

This was a retrospective case-control study of patients undergoing laparotomy for known or suspected gynecologic cancer from Jan. 1, 2017, to Feb. 1, 2020. Patients were matched in a 1:3 ratio (closed incision negative pressure therapy to standard dressing) by body mass index, age, diabetes, bowel surgery, smoking, and steroid use. Surgical site infection was defined according to the Centers for Disease Control and Prevention. Multivariable logistic regression using backward selection was performed.

RESULTS

Of the 1223 eligible patients undergoing laparotomy, 64 (5.2%) received closed incision negative pressure therapy dressings and were matched to 192 (15.7%) controls. There were no differences in medical comorbidities (P>.05), site or stage of malignancy (P>.05), duration of surgery (P=.82), or surgical procedures (P>.05). Use of closed incision negative pressure therapy was associated with reduction in all adverse wound outcomes (20.3% vs 40.1%; P<.001). In particular, closed incision negative pressure therapy was associated with a significant reduction in both superficial incisional surgical site infections (9.4% vs 29.7%; P<.001) and deep incisional surgical site infections (0.0% vs 6.8%; P=.04). In multivariable analysis, use of closed incision negative pressure therapy was associated with significant reduction in the incidence of superficial incisional infections alone (odds ratio, 0.29; 95% confidence interval, 0.12-0.73; P=.008) and both superficial and deep incisional infections (odds ratio, 0.29; 95% confidence interval, 0.12-0.71; P=.007).

CONCLUSION

Use of prophylactic closed incision negative pressure therapy after laparotomy in gynecologic oncology patients was found to be associated with reduced superficial incisional and deep incisional infections compared with standard dressings. Furthermore, closed incision negative pressure therapy was associated with reduction in all other adverse wound outcomes. Closed incision negative pressure therapy may be considered for surgical site infection prevention in high-risk gynecologic oncology patients undergoing laparotomy.

Incisional negative pressure wound therapy does not reduce surgical site infections in abdominal midline incisions: a case control study

Purpose: There is evidence from various surgical specialties that incisional negative pressure wound therapy (iNPWT) might reduce postoperative surgical site infections (SSIs). In visceral and general surgery, there is varying evidence of its efficacy in reducing surgical site infections.Methods: A prospectively registered patient cohort of 43 patients with abdominal wall and visceral surgery received treatment with iNPWT and was compared to a matched retrospective cohort to analyze its effects on SSI occurrence and respective risk factors. Groups were matched by procedure, sex, body mass index and age. We used two different systems of iNPWT: (i) PREVENA^TM or (ii) self-made epicutaneous iNPWT from common VAC material.Results: We could not find a total reduction in postoperative SSIs by application of iNPWT. But within the iNPWT cohort, patients with self-made iNPWT suffered more often from SSIs compared to the commercial iNPWT subgroup. No patient specific risk factors could be identified to advocate the use of iNPWT.Conclusion: Our data do not support the use of an incisional negative pressure wound therapy on closed wounds in midline laparotomy incisions. Although, differences exist between the commmercial and self-made systems.

Clinical Applications and Benefits of Using Closed-Incision Negative Pressure Therapy for Incision and Surrounding Soft Tissue Management: A Novel Approach for Comorbid Wounds

The principle of negative pressure technique dates back to the earliest civilizations; during the Roman era, the technique of using dome-shaped cupping glasses was used to create the suction needed to promote healing. This technique was used throughout the 19th century. In 1821, a British physician named Dr. Francis Fox invented the "glass leech" technique. Thereafter in 1952, an innovative approach was introduced to the treatment of serious, complex wounds through the use of sub-atmospheric or negative pressure known as "negative pressure wound therapy" (NPWT). Later, the "vacuum-assisted closure", or VAC therapy system founded by Dr. Louis Argenta in 1990 revolutionized the advanced wound care market, and still remains the most clinically proven alternative for the treatment of complex, hard-to-heal wounds. These therapies utilize a foam dressing that is conformed to the wound bed. When sealed and placed under negative (vacuum) pressure, the system creates a unique wound-healing environment that has been shown to promote the wound-healing process, reduce edema, prepare the wound bed for closure, promote the formation of granulation tissue and remove infectious materials. The negative pressure therapy system addresses patient quality of life through an easy-to-use system designed to assist surgeons in the management and treatment of comorbid wounds, and open abdomen and other wound complications to help achieve primary fascial closure. Comorbidities can be defined as a concurrence of multiple chronic diseases in the same patient. Closed-incision negative pressure therapy (CINPT) has revolutionized the way in which caregivers treat the most serious, complex wounds or comorbid wounds. Wound healing can be achieved by the host's innate and adaptive immune defence mechanisms as in an uninfected simple surgical incision through the skin or by combination of the host's defence mechanisms and therapeutic modalities. It has been confirmed in some clinical researches that growth factors exert amazing effects on wound-healing promotion and skin function restoration without any obvious side effects. In this review, we have hypothesized a novel modality, focusing on the treatment of wound complications secondary to comorbidity by a combination of negative pressure therapy followed by a positive pressure infusion with growth factor concentrates.

A Multi-Modal Approach to Closing Exploratory Laparotomies Including High-Risk Wounds

Background

Laparotomy incisions with contamination have a high incidence of surgical site infection (SSI). One strategy to reduce SSI has been to allow these wounds to heal by secondary intention; however, this results in an ongoing need for wound care after discharge.

Methods

A prospectively maintained Acute and Critical Care Surgery database was queried for patients who underwent exploratory laparotomy during 2008-2018. Patients were stratified into two groups: 2008-2015 (no protocol [NP]) and 2016-2018 (closure protocol [CP]). CP patients were operated on by a single surgeon utilizing a multi-modal high-risk incisional closure protocol, which included dilute chlorhexidine lavage, closed suction drains for incisions deeper than 3 centimeters, and incisional negative-pressure wound therapy (iNPWT). The CDC (Centers for Disease Control and Prevention) guidelines were used to determine wound classification and SSI based on chart review. Groups were compared using univariate and multivariate analysis.

Results

A total of 139 patients met the study criteria. The overall SSI rate, including superficial and deep space infections, was no different in NP versus CP (21.6 vs. 24.1%; p=0.74). The rate of superficial SSI was similar between NP and CP (11.8 vs. 8.4%; p=0.53). Rates of wound closure at discharge were higher in the CP group than the NP group across wound classes, with the greatest difference among dirty wounds (50.0% NP vs. 94.9% CP; p<0.01). CP significantly increased the likelihood of wound closure (OR=179.2; p<0.001) even after controlling for body mass index, wound classification, ASA (American Society of Anesthesiologists) status, and initially open abdomen.

Conclusions

By addressing both tissue factors and bacterial burden through the use of a multi-modal high-risk incisional closure protocol involving iNPWT, all wounds can be considered for closure without increasing the risk of SSI.

Prophylactic negative pressure wound therapy for closed laparotomy wounds: a systematic review and meta-analysis of randomised controlled trials

Surgical site infections are a common source of post-operative morbidity and contribute significantly to healthcare costs. Patients undergoing emergency laparotomy and/or bowel surgery are particularly at risk. Prophylactic negative pressure wound therapy (NPWT) has been shown to reduce wound infection. However, to date, there has been a lack of consensus around its use for closed laparotomy wounds. We conducted a systematic review of randomised controlled trials comparing the use of prophylactic negative pressure wound therapy with standard dressings for closed laparotomy incisions. The primary outcome was incidence of incisional surgical site infection (SSI) at 30 days post-operatively. Secondary outcomes included superficial and deep SSI, skin dehiscence, fascial dehiscence and length of stay. A total of 2182 publications were identified, of which, following review of titles, abstracts and full texts, five studies met the criteria for inclusion. Across these studies, 467 patients were randomised to NPWT and 464 to standard dressings. Overall SSI rate was 18.6% (n = 87/467) versus 23.9% (n = 111/464) in the NPWT and standard dressing groups, respectively (Odds ratio 0.71, 95% CI 0.52–0.99, p = 0.04*). Deep SSI incidence was the same in both groups (2.6%). Both skin dehiscence and fascial dehiscence were slightly higher in the standard dressing group ((4.2%, n = 11/263 versus 3.1% (n = 8/261) and (0.9% (n = 3/324) versus 0.6% (n = 2/323)), respectively. This study observed that NPWT reduces the overall SSI for closed laparotomy wounds. It supports data recommending the use of prophylactic NPWT dressings, especially in high-risk patients in both emergency and elective circumstances.

Risk Factors for Adverse Outcomes after Ostomy Reversal in Infants Less than Six Months Old

The purpose of this study was to determine risk factors for 30-day complications, reoperation, and readmission after ostomy reversal in infants less than six months old. Infants aged two weeks to six months who underwent ostomy reversal were identified in the 2012 to 2016 ACS NSQIP Pediatric database. Demographics, comorbidities, and 30-day outcomes were assessed. Multivariable logistic regression was used to estimate the independent effects of clinical variables on risk of 30-day complications, reoperation, and readmission. Among 1021 infants, 163 (16%) suffered a 30-day complication. SSIs were the most common complication (5.7%), followed by unplanned reintubation (5.2%) and bleeding (3%). Mortality was 0.4 per cent. Dependence on nutritional support and hematologic disorders were independently associated with postoperative complications. Forty-five children (4.4%) required reoperation and 22 (2.2%) were readmitted for conditions related to the procedure. Younger age and preoperative dependence on oxygen or nutritional support were associated with increased length of stay. SSI, unplanned reintubation, and bleeding are the most frequent complications after ostomy takedown in infants less than six months old. Attention to risk factors predisposing to these complications, including dependence on nutritional support and hematologic disorders, may contribute to improved surgical outcomes.

Closed Incision Negative Pressure Wound Therapy After Resection of Large, Radiated, Soft Tissue Sarcomas

Negative pressure wound therapy (NPWT) has revolutionized wound care. Negative pressure therapy (NPT) is now being applied to closed incisions. Closed-incision NPT (ciNPT) management systems apply negative pressure to the incision and structurally stabilize the surrounding tissues. They are thought to be helpful in high-risk surgical closure. Patients with large sarcomas that have been previously radiated are considered to be among the highest risk for postoperative wound complications. We share our experience with ciNPT in two patients after resection of large, previously irradiated invasive sarcomas. In both cases, healing was uncomplicated. ciNPT shows promise of effective and favorable wound healing in early case reports. Additional prospective randomized clinical trials or registry studies will be necessary to provide higher levels of evidence for this technique.

Clinical Applications and Benefits of Using Closed-incision Negative Pressure Therapy with Novel Dressing: A Review Article

Surgical site occurrences (SSOs) are common in patients undergoing operative procedures, especially in the form of surgical site infections (SSIs). Multiple studies show that obesity, tobacco use, prolonged surgical time, and diabetes mellitus are the major risk factors for SSIs. SSIs increase healthcare costs and often result in morbidity. Many surgeons are currently using closed-incision negative pressure therapy (ciNPT) to counter SSIs. This method makes it easier for them to manage closed and surgical incisions. This technique has already been applied in the plastic surgery field. This study discusses how the use of ciNPT is helping surgeons to reduce complications related to SSOs. The technique has been reported to minimize the rate of reoperations, readmissions, and other wound-related complications. Using ciNPT with novel dressing has proved to be a significantly effective clinical intervention method in managing clean and closed wounds. The novel dressing protects the incision from external contamination and minimizes lateral tension.

Comparison of negative-pressure incision management system in wound dehiscence: A prospective, randomized, observational study

Wound dehiscence is a significant problem faced by surgeons after major abdominal surgery. In this study, it was aimed to select the best incision management system to keep the incision edges together and prevent wound opening, and infection by protecting the incision. In this study, 60 patients who underwent abdominal surgery were evaluated regarding their risk of wound dehiscence. In our clinic, high-risk cases of abdominal surgery are performed, the risk factors being ischemia along the incision line, dirty and contaminated wound, obesity, tension on the suture line, traumatization of the wound site, age at onset (> 65), body mass index (BMI) > 30, diabetes mellitus, chronic obstructive pulmonary disease (COPD), immunosuppressive drug users. A prospective study protocol was planned after ASA (American Society of Anesthesiologists) physical status class assignment. Patients were divided into three groups: patients who underwent a postoperative negative-pressure therapy dressing, patients who underwent subcutaneous aspiration drainage, and patients who received standard dressing. The aim of this study was to evaluate the decompensation, surgical site infection, seroma, hospital stay and costs and to evaluate the results in the postoperative period. Sixty patients were randomized (n = 20, for each group). Thirty-one (51%) of the patients were male, and the mean age was 64.3 ± 8.9 (46-85). The mean BMI was 30.45 ± 7.2. There was no statistically significant difference (p≥0.05) between groups in terms of sex, age, and BMI. The ASA score and surgical interventions were similar between the groups. Wound dehiscence rate was 25% (n = 8), 20% (n = 6) and 3% (n = 1) for the Standard Dressing (SD), Aspiration Drainage (AD) and Negative-Pressure (NP) groups, respectively (p <0.017). Duration of hospitalization was 16.45 ± 6.6, 14.3 ± 7.4 and 8.95 ± 2.8 days (p <0.001) for SD, AD and NP groups, respectively. No statistically significant difference was found between the groups regarding other variables (p≥0.05 for all variables). Negative-pressure wound treatment is an easy, fast and practical technique which reduces lateral tension and swelling. It provides perfusion support and helps to protect the surgical field against external sources of infection.

Closed incision negative pressure therapy: Results of recent trials and recommendations for clinical practice

BACKGROUND

Open abdominal surgery is associated with high rates of wound complications . Surgical site infection (SSI) is associated with prolonged length of stay, delayed treatment and high rates of readmission ^{(1, 3, 4)}. Negative pressure wound therapy over closed incisions (ciNPWT) is a novel approach to prevention of SSI. We reviewed the outcomes of studies comparing ciNPWT and standard therapy in open abdominal wounds to assess the efficacy of the current evidence base.

AIM

To assess the effect of negative pressure wound therapy used over closed incisions in open abdominal surgery.

METHODS

Search of relevant terms was conducted on PubMed, Scopus and Cochrane to identify studies published between Jan 2006-Feb 2019. Studies were chosen based on specific inclusion criteria. Articles were screened to assess demographics, study design and outcomes.

RESULTS

Seven retrospective and six prospective randomised controlled trials were identified for inclusion, totalling 3048 participants. 967 received ciNPWT and 2081 received standard treatment. Studies assessed a mix of surgeries (colorectal n = 6, pancreaticoduodenectomy n = 1, gynaecologic n = 1, acute care surgery n = 1, mixed open n = 2). ciNPWT was statistically significant in reducing SSI in 9 of 13 studies.

CONCLUSION

ciNPWT in open abdominal surgery has demonstrated promising results for reducing SSI rate in some trials however, patient selection remains unclear. Recent randomized controlled trials have failed to demonstrate benefit overall with use of ciNPWT in open abdominal surgery. Further multicentre prospective trials are needed for cost-benefit analysis and appropriate patient-selection.

Closed Incision Negative Pressure Therapy: Review of the Literature

Surgical site infection and other common surgical site complications (dehiscence, hematoma, and seroma formation) can lead to serious and often life-threatening complications. Gauze, adhesive dressings, and skin adhesives have traditionally been utilized for incision management. However, the application of negative pressure wound therapy over clean, closed surgical incisions (closed incision negative pressure therapy, ciNPT), has become a recent option for incision management. A brief review of ciNPT clinical evidence and health economic evidence are presented. A brief literature review was performed using available publication databases (PubMed, Ovid®, Embase®, and QUOSA™) for articles in English reporting on the use of ciNPT between October 1, 2016, to March 31, 2019. The successful application of ciNPT over clean, closed wounds has been reported in a broad spectrum of patients and operative interventions, resulting in favorable clinical results. Four of the five studies that examined health economics following the use of ciNPT reported a potential reduction in the cost of care. The authors' own experience and published results suggest that patients at high risk for developing a surgical site complication may benefit from the use of ciNPT during the immediate postoperative period. Additional studies are needed across various surgical disciplines to further assess the safety, and cost-effectiveness of ciNPT use in patient populations.

Economic Analysis Based on the Use of Closed-Incision Negative-Pressure Therapy after Postoperative Breast Reconstruction

BACKGROUND

Breast cancer accounts for 30% of all new cancer diagnoses in women. Although more options are now available regarding breast reconstruction, the risk of complications (eg, infection, dehiscence, and expander exposure) is also prevalent and must be considered when choosing a reconstruction option because the cost for complications can be substantial.

METHODS

A hypothetical cost model was applied to clinical outcomes of a previous retrospective study comparing the use of closed-incision negative-pressure therapy (ciNPT) and standard of care (SOC) over breast incisions after immediate reconstruction. The adjusted complication cost for a mastectomy with reconstruction was a mean of $10,402 and was calculated using a database of inpatient, outpatient, and carrier claims.

RESULTS

The previous retrospective study included data on 665 breasts (ciNPT = 331, SOC = 334) and 356 female patients (ciNPT = 177, SOC = 179) and reported on complication rates at the breast level: 8.5% (28/331) for the ciNPT breast group versus 15.9% (53/334) for the SOC group (P = 0.0092). In the ciNPT group, 24/177 patients (13.6%) had a complication, whereas in the SOC group, 38/179 patients (21.2%) had a complication. Based on the adjusted mean complication cost of $10,402, total complication cost for the ciNPT group was $250,000 versus $395,000 for the SOC group with a per-patient cost savings of $218.00 with ciNPT.

CONCLUSION

The authors' preliminary findings show potential cost savings with the use of ciNPT over breast incisions and warrant further study regarding the cost-effectiveness of ciNPT compared with standard of care after immediate breast reconstruction.

Meta-Analysis of Comparative Trials Evaluating a Single-Use Closed-Incision Negative-Pressure Therapy System

BACKGROUND

Surgical site infections (SSIs) pose a significant surgical complication. Application of closed-incision negative-pressure therapy (ciNPT) has been associated with reduced SSI rates in published literature. This meta-analysis examines the effect of ciNPT use over closed incisions in reducing SSIs versus traditional dressings.

METHODS

A systematic literature search using PubMed, The Cochrane Library, OVID, EMBASE, ScienceDirect, and QUOSA was performed focusing on publications between January 1, 2005, and April 30, 2018. Characteristics of study participants, surgical procedure, type of dressing used, duration of treatment, incidence of SSI, and length of follow-up were extracted. Weighted odds ratios and 95% CIs were calculated to pool study and control groups in each publication for analysis. Treatment effects were combined using Mantel-Haenszel odds ratios as the summary statistics, and a fixed-effects model was used for each analysis performed. The chi-square test was used to statistically assess heterogeneity. For each meta-analysis performed, the more conservative random-effects models were conducted as sensitivity analyses.

RESULTS

For all meta-analyses (randomized controlled trial only, observational studies only, colorectal/abdominal, obstetrics, lower extremity, groin/vascular, cardiac), heterogeneity tests were nonsignificant (P > 0.05). All fixed-effects meta-analyses were significant in favor of ciNPT use over traditional dressings (P < 0.05). When the random-effects analyses were performed, all analyses except obstetrics remained significant (P < 0.05).

CONCLUSION

For all meta-analyses performed using the fixed-effects approach, ciNPT usage demonstrated a statistically significant reduction in incidence of SSI relative to traditional dressings.

Chinese Trauma Surgeon Association for management guidelines of vacuum sealing drainage application in abdominal surgeries-Update and systematic review

Vacuum sealing drainage (VSD) is frequently used in abdominal surgeries. However, relevant guidelines are rare. Chinese Trauma Surgeon Association organized a committee composed of 28 experts across China in July 2017, aiming to provide an evidence-based recommendation for the application of VSD in abdominal surgeries. Eleven questions regarding the use of VSD in abdominal surgeries were addressed: (1) which type of materials should be respectively chosen for the intraperitoneal cavity, retroperitoneal cavity and superficial incisions? (2) Can VSD be preventively used for a high-risk abdominal incision with primary suture? (3) Can VSD be used in severely contaminated/infected abdominal surgical sites? (4) Can VSD be used for temporary abdominal cavity closure under some special conditions such as severe abdominal trauma, infection, liver transplantation and intra-abdominal volume increment in abdominal compartment syndrome? (5) Can VSD be used in abdominal organ inflammation, injury, or postoperative drainage? (6) Can VSD be used in the treatment of intestinal fistula and pancreatic fistula? (7) Can VSD be used in the treatment of intra-abdominal and extra-peritoneal abscess? (8) Can VSD be used in the treatment of abdominal wall wounds, wound cavity, and defects? (9) Does VSD increase the risk of bleeding? (10) Does VSD increase the risk of intestinal wall injury? (11) Does VSD increase the risk of peritoneal adhesion? Focusing on these questions, evidence-based recommendations were given accordingly. VSD was strongly recommended regarding the questions 2-4. Weak recommendations were made regarding questions 1 and 5-11. Proper use of VSD in abdominal surgeries can lower the risk of infection in abdominal incisions with primary suture, treat severely contaminated/infected surgical sites and facilitate temporary abdominal cavity closure.

Perioperative Bundle to Reduce Surgical Site Infection after Pancreaticoduodenectomy: A Prospective Cohort Study

BACKGROUND

Pancreaticoduodenectomy is historically associated with incisional surgical site infection (iSSI) rates between 15% and 20%. Prospective studies have been mixed with respect to the benefit of individual interventions directed at decreasing iSSI. We hypothesized that the application of a perioperative bundle during pancreaticoduodenectomy would decrease the rate of iSSIs significantly.

METHODS

An initial cohort of 150 consecutive post-pancreaticoduodenectomy patients were assessed within 2 to 4 weeks of operation to determine baseline iSSI rates. The CDC definition of iSSI was used. A 4-part perioperative bundle was then instituted for the second cohort of 150 patients. This bundle consisted of a double-ring wound protector, gown/glove and drape change before fascial closure, irrigation of the wound with bacitracin solution, and a negative-pressure wound dressing that was left in place until postoperative day 7 or day of discharge. Three-hundred patients provided 80% power to detect a 50% risk reduction in iSSIs.

RESULTS

Cohorts 1 and 2 were similar with respect to age (68 vs 69 years; p = 0.918), sex (male, 51% vs 55%; p = 0.644), BMI (26 vs 26 kg/m²; p = 0.928), use of neoadjuvant therapy (21% vs 17%; p = 0.377), median operative time (222 vs 215 minutes; p = 0.366), and presence of a preoperative stent (53% vs 41%; p = 0.064). The iSSI rate was 22.3% in the initial cohort. This rate was higher than both our institutional database (13%) and NSQIP reporting (11%). Within the second cohort, the iSSI rate decreased significantly to 10.7% (n = 16; p = 0.012). All 4 components of the bundle were used in 91% of cohort 2 patients.

CONCLUSIONS

In this cohort study of 300 consecutive patients who underwent pancreaticoduodenectomy, the implementation of a 4-part bundle decreased iSSI rate from 22% to 11%.

Prophylactic closed-incision negative-pressure wound therapy is associated with decreased surgical site infection in high-risk colorectal surgery laparotomy wounds

AIM

Surgical site infection in colorectal surgery is associated with significant healthcare costs, which may be reduced by using a closed-incision negative-pressure therapy device. The aim of this study was to assess the impact of closed-incision negative-pressure therapy on the incidence of surgical site infection.

METHOD

In this retrospective cohort study we evaluated all patients who had undergone high-risk open colorectal surgery at a single tertiary care centre from 2012 to 2016. We compared the incidence of surgical site infection between those receiving standard postoperative wound care between 2012 and 2014 and those receiving closed-incision negative-pressure therapy via a customizable device (Prevena Incision Management System, KCI, an Acelity company, San Antonio, Texas, USA) between 2014 and 2016. A validated surgical site infection risk score was used to create a 1:1 matched cohort subset.

RESULTS

Negative pressure therapy was used in 77 patients and compared with 238 controls. Negative pressure patients were more likely to have a stoma (92% vs 48%, P < 0.01) and to be smokers (33% vs 15%, P < 0.01). Surgical site infection was higher in control patients (15%, n = 35/238) compared with negative pressure patients (7%, n = 5/77) (P = 0.05). On regression analysis, negative pressure therapy was associated with decreased surgical site infection (OR 0.27; 95% CI 0.09-0.78). These differences persisted in the matched analysis.

CONCLUSION

Negative pressure therapy was associated with decreased surgical site infection. Negative pressure therapy offers significant potential for quality improvement.

Negative Pressure Wound Therapy for Closed Laparotomy Incisions in General and Colorectal Surgery: A Systematic Review and Meta-analysis

Importance

Surgical site infections (SSIs) are common after laparotomy wounds and are associated with a significant economic burden. The use of negative pressure wound therapy (NPWT) has recently been broadened to closed surgical incisions.

Objective

To evaluate the association of prophylactic NPWT with SSI rates in closed laparotomy incisions performed for general and colorectal surgery in elective and emergency settings.

Data Sources

The PubMed, Embase, Cochrane Central Register of Controlled Trials, and Google Scholar databases were searched without language restrictions for relevant articles from inception until December 2017. The latest search was performed on December 31, 2017. The bibliographies of retrieved studies were further screened for potential additional studies.

Study Selection

Randomized clinical trials and nonrandomized studies were included. Unpublished reports were excluded, as were studies that examined NPWT (or standard nonpressure) dressings only without a comparator group. Studies that evaluated the use of NPWT in open abdominal incisions were also excluded. Disagreement was resolved by discussion, and if the question remained unsettled, the opinion of the senior author was sought. A total of 198 citations were identified, and 189 were excluded.

Data Extraction and Synthesis

This meta-analysis was conducted according to PRISMA guidelines. Data were independently extracted by 2 authors. A random-effects model was used for statistical analysis.

Main Outcomes and Measures

The primary outcome measure was SSI, and secondary outcomes included seroma and wound dehiscence rates. These outcomes were chosen before data collection.

Results

Nine unique studies (3 randomized trials and 2 prospective and 4 retrospective studies) capturing 1266 unique patients were included. Of these, 1187 patients with 1189 incisions were included in the final analysis (52.3% male among 7 studies reporting data on sex; mean [SD] age, 52 [15] years among 8 studies reporting data on age). Significant clinical and methodologic heterogeneity existed among studies. On random-effects analysis, NPWT was associated with a significantly lower rate of SSI compared with standard dressings (pooled odds ratio [OR], 0.25; 95% CI, 0.12-0.52; P < .001). However, no difference in rates of seroma (pooled OR, 0.38; 95% CI, 0.12-1.23; P = .11) or wound dehiscence (pooled OR, 2.03; 95% CI, 0.61-6.78; P = .25) was found. On sensitivity analysis, focusing solely on colorectal procedures, NPWT significantly reduced SSI rates (pooled OR, 0.16; 95% CI, 0.07-0.36; P < .001).

Conclusions and Relevance

Application of NPWT on closed laparotomy wounds in general and colorectal surgery is associated with reduced SSI rates but similar rates of seroma and wound dehiscence compared with conventional nonpressure dressings.

Vacuum-assisted closure (VAC®) systems and microbiological isolation of infected wounds

Background

Negative pressure wound therapy is now largely used to treat infected wounds. The prevention and reduction of healthcare-associated infections is a high priority for any Department of Health and great efforts are spent to improve infection control systems. It is assumed that vacuum-assisted closure (VAC®) dressings should be watertight and that all the secretions are gathered in a single container but there is no consistent data on air leakage and possible dispersion of bacteria from the machine.

Methods

We have conducted a prospective experimental study on 10 patients with diagnosis of wound infection to verify whether the filtration process is microbiologically efficient. We compared the bacteria population present in the wound to the one present in the air discharged by the VAC® machine.

Results

This study shows that the contamination of the VAC® machine is considerably lower than the environment or wound contamination.

Conclusions

Negative pressure wound therapy system does not represent a risk factor for healthcare-associated infections.

The effect of postoperative closed incision negative pressure therapy on the incidence of donor site wound dehiscence in breast reconstruction patients: DEhiscence PREvention Study (DEPRES), pilot randomized controlled trial

AIM

Wound dehiscence is a serious postoperative complication associated both with high morbidity and mortality. It has a significant rate of occurrence in breast reconstruction surgeries with a deep internal epigastric perforator (DIEP) and with a profunda artery perforator (PAP) flap. Risk factors for wound dehiscence include smoking, diabetes mellitus, chronic obstructive pulmonary disease, and obesity. The aim of this pilot study was to assess whether postoperative treatment with closed incision negative pressure therapy (ciNPT) decreases the incidence of donor site wound dehiscence in breast reconstruction patients.

METHOD

Women undergoing a breast reconstruction with a DIEP or PAP flap were enrolled in a pilot randomized controlled trial and assigned treatment with either ciNPT or adhesive strips. The primary outcome was wound dehiscence upon follow-up after four weeks. Secondary outcomes that were evaluated included wound infection, pain, and allergy. There was no loss to follow-up.

RESULTS

This pilot study included 51 women (n = 25 ciNPT, n = 26 adhesive strips). The two groups did not differ significantly in patients demographics or comorbidities. Wound dehiscence occurred in 11 patients (n = 2 ciNPT, n = 9 adhesive strips). This difference was statistically significant: p = 0.038. There were no statistically significant differences in secondary outcomes between the two groups.

CONCLUSION

In this pilot study, postoperative treatment with ciNPT decreased the incidence of donor site wound dehiscence in breast reconstruction patients. Further research is ongoing by the same hospital. This trial was registered in the Netherlands Trial Register (NTR) under ID no. NTR5808.