Effect of retension sutures on abdominal pressure after abdominal surgery

Successful Management of Complicated Burst Abdomen With Open Abdomen Using Only Simple Saline Dressing

Introduction: Necrosis of the rectus or lateral abdominal wall investing fascia may be associated with invasive infections or closure under extreme tension. This can lead to fascial dehiscence and evisceration of the intra-abdominal contents. Globally, abdominal wound dehiscence varies from 0.4% to 3.5% with associated mortalities reaching up to 45% in the perioperative period. Redo surgical operations and infectious complications are the major risk factors for abdominal wound dehiscence, but also presence of low albumin, glucocorticoid use, chest infections, and emergency surgeries have been also implicated. Open abdomen has been employed in incidences of trauma where a second look operation may be necessary, loss of abdominal wall, sepsis after penetrating abdominal trauma, and in cases of severe secondary peritonitis and acute pancreatitis. Patients with open abdomen are at a risk of fistula formation, sepsis, and loss of abdominal domain due to lateral fascial retraction. To reduce the mentioned complications mesh and nonmediated techniques to bridge fascia defects have been recommended with particular emphasis on biologic meshes with or without negative pressure wound therapy, component separation, or planned ventral hernia. Methods: We report a case of necrosis of the rectus and abdominal wound dehiscence and its management in a sub-Saharan setting, highlighting the challenges encountered and lessons learned. Conclusion: Retention sutures should be used cautiously in the management of wound dehiscence as it increases the risk of fascial necrosis in cases of intra-abdominal hypertension, as seen in our patient. In the absence of a VAC dressing, the utilization of routine saline gauze dressing promotes epithelialization over the exposed bowel and is a viable alternative to temporary abdominal closure modes of managing an open abdomen in a resource-limited setting.

Treatment of Superficial Incision Dehiscence after Abdominal Surgery by Z-Plasty: A Retrospective Case Series

OBJECTIVE

To explore the treatment of superficial incision dehiscence after abdominal surgery by Z-plasty combined with negative-pressure wound therapy.

METHODS

A retrospective study was performed on seven patients with superficial abdominal incision dehiscence from October 2018 to February 2019. All patients were given systemic antibiotics and nutrition support. During the first stage, surgical debridement with negative-pressure wound therapy was performed. Local Z-plasty was performed in the second stage.

RESULTS

The incision healed well in all patients, and no infection or necrosis occurred in the flaps. During the follow-up of 7.3 months (range, 5-10 months), no incision rupture or redehiscence occurred.

CONCLUSIONS

Surgical debridement, negative-pressure wound therapy, and Z-plasty can be used to treat superficial abdominal incision dehiscence and achieve good therapeutic effect and prognosis. Z-plasty can be used as an alternative to direct suture of incisions because of its simplicity and excellent results.

Danhong Injection Alleviates Postoperative Intra-abdominal Adhesion in a Rat Model

Background

Among all the common complications that occur after abdominal surgery, intestinal adhesion is perhaps the most unpleasant one. However, current methods to treat and prevent intestinal adhesion are limited; thus, exploring new methods to prevent and treat intestinal adhesion is greatly needed. In this study, we demonstrated that Danhong injection (DHI) may be used as a promising method to prevent and treat intra-abdominal adhesion in a rat model.

Materials and Methods

Forty-eight rats were randomly divided into six groups. Except for the sham-operated group, all rats underwent cecal abrasion to establish an adhesion model. After the operation, the rats in the DHI-treated groups received different doses of DHI via the tail vein daily, while the other group was treated with the same volume of saline solution. Seven days after the operation, all rats were sacrificed, and the degree of adhesion was evaluated by Nair's scoring system. The extent of inflammation in the adhesion tissue was detected by HE staining and the expression of tumor necrosis factor-α (TNF-α) and transforming growth factor-β (TGF-β). The collagen deposition was assessed by Sirius red staining and α-SMA, MMP9, t-PA, and PAI-1 levels. Oxidative stress was indicated by the level of reactive oxygen species (ROS) in adhesion tissues and by immunohistochemical labeling of Nrf2. Furthermore, rat primary peritoneal mesothelial cells (RPMCs) were treated with H₂O₂ and DHI, and NF-κB phosphorylation was detected to illustrate the effect of DHI on oxidative stress.

Results

The intra-abdominal adhesion scores were significantly decreased in the groups treated with a high dose of DHI compared with the control groups, and the degree of inflammation, fibrosis, and oxidative stress was also significantly decreased. DHI treatment significantly reduced the levels of TNF-α, TGF-β1, and PAI and increased the expression levels of MMP9, Nrf2, and t-PA in the adhesion tissues. ROS levels and NF-κB phosphorylation were significantly reduced in DHI-treated RPMCs compared with the control RPMCs.

Conclusion

DHI alleviates the formation of postoperative intra-abdominal adhesions by inhibiting inflammation, collagen deposition, and oxidative stress in a rat model and may serve as a promising drug to prevent intra-abdominal adhesions.