The clinical anatomy of the triangle of Petit

INTRODUCTION

Hernias through the triangle of Petit (TP) are uncommon. The anatomy of the TP is known to be variable, yet quantitative data are scant.

MATERIALS AND METHODS

The triangle was observed in 80 adult cadavers and its dimensions and surface area were measured.

RESULTS

On the basis of surface area we classified the triangles into four types. Type I or small TP, with a surface area of <8 cm2, accounted for 43.7% of our specimens. Type II (26.2%) were intermediate in size, with a surface areas of 8-12 cm2. Type III (12.5%) were large triangles with surface areas >12 cm2. Finally, Type IV (17.5%) were not triangles. In these, the latissimus dorsi was covered by the external abdominal oblique muscle.

CONCLUSIONS

We hope these data will help prediction of which patients are at greater risk of herniation through the TP.

Use of human and porcine dermal-derived bioprostheses in complex abdominal wall reconstructions: a literature review and case report

The goal of abdominal wall reconstruction is to restore and maintain abdominal domain. A PubMed(R) review of the literature (including "old" MEDLINE through February 2007) suggests that bioprosthetic materials are increasingly used to facilitate complex abdominal wall reconstruction. Reported results (eight case reports/series involving 137 patients) are encouraging. The most commonly reported complications are wound seroma (18 patients, 13%), skin dehiscence with graft exposure without herniation (six, 4.4%), superficial and deep wound infections (five, 3.6%), hernia recurrence (four, 2.9%), graft failure with dehiscence (two), hematoma (two), enterocutaneous fistula (one), and flap necrosis (one). Two recent cases are reported herein. In one, a 46-year-old woman required open abdominal management after gastric remnant perforation following a Roux-en-Y gastric bypass procedure. Porcine dermal collagen combined with cutaneous flaps was used for definitive abdominal wall reconstruction. The patient's condition improved postoperatively and she was well 5 months after discharge from the hospital. In the second, a 54-year-old woman underwent repair of an abdominal wall defect following resection of a large leiomyosarcoma. Human acellular dermis combined with myocutaneous flaps was used to reconstruct the abdominal wall defect. The patient's recovery was uncomplicated and 20 weeks following surgery she was doing well with no evidence of recurrence or hernia. The results reported to date and the outcomes presented here suggest that bioprosthetic materials are safe and effective for repair of large abdominal wall defects. Prospective, randomized, controlled studies are needed to compare the safety and efficacy of other reconstructive techniques as well as human and porcine dermal-derived bioprostheses.

Internal hernia with Roux loop obstruction during pregnancy after gastric bypass surgery

We report the rare case of a pregnant woman who had undergone Roux-en-Y gastric bypass 8 months previously, and now presented with subacute small bowel obstruction secondary to internal herniation of some of the proximal Roux limb into the lesser sac through the transverse mesocolon rent, which was widely spread apart. At laparoscopy, the hernia contents were reduced and the defect was repaired. The patient made a good recovery. Because of the changes associated with pregnancy, gastric bypass patients may be at an increased risk of internal herniation. It is particularly important not to delay surgical exploration, even in the absence of a positive finding on imaging, because delay may lead to potentially devastating bowel strangulation and sepsis culminating in loss of fetus and mother.

Gastro-gastric fistula between pouch and fundus following gastric banding and bypass

A complication observed with revisional surgery involving a fistula between the former pouch after gastric banding and the fundus is described. A 59-year-old man with BMI 41 kg/m(2) presented for Roux-en-Y gastric bypass (RYGBP). He had previously undergone an open gastric banding operation, with the band removed for obstruction 1 year later. He presented to our hospital with a third incisional hernia which was so large that he suffered from abdominal angina following meals. A RYGBP and a hernia repair with mesh were performed. The postoperative contrast x-ray study disclosed a fistula between the pouch and fundus. A procedure to close the fistula became necessary. The reason for the fistula may have been an erosion at the former connection between the pouch and the fundus after gastric banding, although a preoperative gastroscopy had not revealed this fistula.

Successful conservative treatment of a bicycle-handlebar hernia: report of a case

Handlebar hernia is a rare type of blunt traumatic abdominal wall hernia (TAWH). It involves a disruption of the abdominal wall muscles, with bowel loop herniation through the defect in the abdominal wall. We report a case of bicycle-handlebar hernia in a 9-year-old boy who had all layers of his abdominal wall disrupted after falling from his bicycle. He was brought to our hospital with lower abdominal pain and bulging. A physical examination revealed left lower quadrant bulging in a standing posture, and a palpable fascial defect, 3 cm in diameter. Computed tomography showed a disruption of the abdominal rectal muscle layer, but his skin and intra-abdominal organs were completely intact. The patient was treated conservatively with abdominal wall compression using a cotton cloth corset. Within 3 weeks, his abdominal wall hernia had healed without the need for any surgical intervention.

Internal hernia with strangulation through a mesenteric defect after laparoscopy-assisted transverse colectomy: report of a case

A 58-year-old woman underwent laparoscopy-assisted transverse colectomy for transverse colon cancer. On postoperative day 7, she experienced sudden abdominal pain accompanied by vomiting and fever. Computed tomography showed a small bowel obstruction caused by an internal hernia. Laparotomy revealed an internal hernia through the mesenteric defect at the anastomotic colonic stumps, which had not been closed in the previous operation. Almost the entire small bowel protruding through the mesenteric defect was found in the omental bursa. We resected part of the jejunal loop, which was strangulated and congested by an adherent band. Our experience suggests that if the mesenteric defect is relatively small, it should be closed completely during laparoscopy-assisted colectomy; however, more studies are required to determine the indications for closure of the mesenteric defect to prevent this complication.

Evaluation of hernia repair operation in Child-Turcotte-Pugh class C cirrhosis and refractory ascites

BACKGROUND AND AIM

Abdominal wall hernia is a common feature of decompensated liver cirrhosis and frequently causes life-threatening complications or severe pain. However, there have been no data reported on postoperative mortality, hepatic functional deterioration and recurrence rate according to Child-Turcotte-Pugh (CTP) class and to the presence of refractory ascites.

METHODS

The study population comprised 53 liver cirrhosis patients who underwent hernia repair operation. Comparisons were made of 30-day mortality among the different CTP classes, and between those with or without refractory ascites. Liver function was also analyzed just before the operation, in the immediate postoperative period, and in the remote postoperative period.

RESULTS

Seventeen patients were in CTP class A, 27 patients in class B, and 9 patients in class C. The median follow-up duration was 24 months. There was single 30-day postoperative mortality in class C, and no CTP class deterioration after 30 days of operation. There was no mortality or recurrences in 17 patients with medically refractory ascites. The difference in 30-day mortality according to CTP class and the presence of refractory ascites did not show statistical significance (P = 0.17 and 0.97, respectively).

CONCLUSION

Hernia operation could be done safely in CTP class A and B with low rate of recurrences, and there was no definitive increase in the operative risk in class C. In addition, refractory ascites did not increase operative risk and recurrence rate. Therefore, surgical repair might be recommended even in patients with refractory ascites and poor hepatic function to prevent life-threatening complications or severe pain.

Handlebar hernia: traumatic abdominal wall hernia with multiple enterotomies. A case report and review of the literature

Handlebar hernia, caused by low-energy impact against a handlebar, is a localized abdominal wall hernia that is blunt enough not to penetrate the skin but severe enough to cause the disruption of abdominal wall musculature. In 1964, Roberts (Br J Surg 1964;51:153) reported the first case of a traumatic abdominal wall hernia that occurred in a 9-year-old boy after a fall upon a bicycle handle. Since then, 12 other cases have been reported. To the best of our knowledge, the case described here is the first documented case of an incarcerated handlebar hernia associated with a small bowel perforation and mesenteric disruption.

Controversies in the current management of lumbar hernias

BACKGROUND

Abdominal wall surgery has changed dramatically in recent years. The current management of lumbar hernias should reflect the development of modern imaging techniques and new forms of noninvasive treatment.

OBJECTIVE

To review and update knowledge on lumbar hernias.

DATA SOURCES

Literature review using MEDLINE with the key words "lumbar hernia" for the years 1950 through 2004. For an analysis prior to this date (1750-1950), we used cases reported by Thorek. Our own study of 28 patients was also included.

STUDY SELECTION

All articles reporting clinical cases on lumbar hernia.

DATA EXTRACTION

Two reviewers analyzed the epidemiological, clinical, and treatment data of the articles.

DATA SYNTHESIS

One hundred thirty-five clinical case articles and 8 studies with more than 5 patients, together with our personal experience of 28 cases, were analyzed. Nine percent of acquired lumbar hernia cases presented for emergency surgery, which means that a clinical diagnosis was completed with computed tomography in more than 90% of the cases. None of the published classifications has a therapeutic orientation. We present an original classification based on 6 categories and 4 types. In our study, there was a predominance of incisional hernias (79%), with no difference with regard to sex or location but with a predominance in the upper space (47%). Laparoscopic treatment accounts for 9% of the publications' cases and there is only 1 prospective comparative study.

CONCLUSIONS

The use of a complete classification and tomography must be standard practice in the preoperative protocol of patients with lumbar hernia. The laparoscopic approach seems to be the best option for treating small or moderate defects; open surgery can be reserved for large defects and to salvage failures with the laparoscopic approach.

Difficulties Experienced by the Ostomate After Hospital Discharge

PURPOSE

This descriptive study used a mailed survey to identify difficulties related to the stoma that ostomates experience after discharge from the hospital, who they sought help from, and if the advice was perceived as helpful.

SUBJECTS AND SETTING

Ostomates who are 18 years or older and have undergone a urinary or fecal diversion at a North Carolina hospital between January 1, 2003 and June 30, 2005, were asked to respond to a survey about the difficulties related to their ostomy.

INSTRUMENT

The survey gathered demographic and anthropometric data, information regarding stomal complications, self-evaluation of emotional state, and contact with clinicians and support groups.

RESULTS

Of the 140 surveys mailed, 43 were returned, demonstrating a return rate of 31%. Thirty-four returned surveys were useable for statistical analysis. The top 5 difficulties experienced by the respondents were peristomal skin irritation (76%), pouch leakage (62%), odor (59%), reduction in previously enjoyed activities (54%), and depression/anxiety (53%). Twenty percent of the ostomates who experienced difficulties after surgery did not seek help. Ostomates primarily sought help from nurses when they experienced problems related to the stoma and its maintenance. For mental health, sleep, and sexual problems, a medical doctor was the practitioner of choice. Ostomates were satisfied with most of the help they received from an ostomy nurse; satisfaction was lower for home health nurses and surgeon or primary care physician practices. Average wear time for a stoma pouch was 4 days.

CONCLUSION

The majority of the ostomates experienced difficulty with pouch leakage, skin irritation, odor, depression or anxiety, and uneven pouching surfaces. Ostomates desire assistance with these problems and will benefit from long-term follow-up by an ostomy nurse.

Difficulties experienced by the ostomate after hospital discharge

PURPOSE

This descriptive study used a mailed survey to identify difficulties related to the stoma that ostomates experience after discharge from the hospital, who they sought help from, and if the advice was perceived as helpful.

SUBJECTS AND SETTING

Ostomates who are 18 years or older and have undergone a urinary or fecal diversion at a North Carolina hospital between January 1, 2003 and June 30, 2005, were asked to respond to a survey about the difficulties related to their ostomy.

INSTRUMENT

The survey gathered demographic and anthropometric data, information regarding stomal complications, self-evaluation of emotional state, and contact with clinicians and support groups.

RESULTS

Of the 140 surveys mailed, 43 were returned, demonstrating a return rate of 31%. Thirty-four returned surveys were useable for statistical analysis. The top 5 difficulties experienced by the respondents were peristomal skin irritation (76%), pouch leakage (62%), odor (59%), reduction in previously enjoyed activities (54%), and depression/anxiety (53%). Twenty percent of the ostomates who experienced difficulties after surgery did not seek help. Ostomates primarily sought help from nurses when they experienced problems related to the stoma and its maintenance. For mental health, sleep, and sexual problems, a medical doctor was the practitioner of choice. Ostomates were satisfied with most of the help they received from an ostomy nurse; satisfaction was lower for home health nurses and surgeon or primary care physician practices. Average wear time for a stoma pouch was 4 days.

CONCLUSION

The majority of the ostomates experienced difficulty with pouch leakage, skin irritation, odor, depression or anxiety, and uneven pouching surfaces. Ostomates desire assistance with these problems and will benefit from long-term follow-up by an ostomy nurse.

Blunt and penetrating traumatic ruptures of the diaphragm

BACKGROUND

The difficulties in diagnosing traumatic diaphragmatic rupture (TDR) at the first admission are the most common causes of morbidity and mortality. The purpose of this study was to review our experience with the management of TDR in order to identify the factors contributing to diagnostic delay and associated morbidity and mortality.

METHODS

Fourteen patients with TDR were treated in our hospital between January 2000 and June 2005. They have been investigated retrospectively.

RESULTS

The study identified 9 men (64 %) and 5 women (36 %), with ages ranging from 19 to 65 years (mean 35.3 years). Rupture of the diaphragm was left-sided in 10 (71 %) and right-sided in 4 (29 %) of the patients. Blunt trauma accounted for the injuries of 11 patients (79 %). Early diagnosis was obtained in 9 patients (64 %). The diagnosis was established preoperatively in 8 patients (57 %), and intraoperatively in 4 (29 %). The diagnosis was missed in 2 (14 %) patients in the first operation. Multiple associated injuries were observed in 12 patients (85 %). Postoperative complications were encountered in five patients (35 %), and the overall mortality was 7 %.

CONCLUSIONS

Diaphragmatic rupture should be suspected in all blunt or penetrating traumas of the thorax and abdomen, and the presence of such an injury should be excluded before terminating the exploratory procedure.

Bowel complications seen on CT after pancreas transplantation with enteric drainage

OBJECTIVE

Bowel-related complications from pancreas transplantation account for much of the postsurgical morbidity. In a review of 98 pancreas transplant recipients, we found 19 (19.4%) with such complications.

CONCLUSION

The most common problems were small-bowel obstruction and anastomotic leaks. Adhesions and internal hernias accounted for most postoperative bowel obstructions.

Giant spigelian hernia due to abdominal wall injury: a case report

Spigelian hernia is a rare clinical entity. It is difficult to diagnose due to its location. In this article we report the case of a giant spigelian hernia consequent to abdominal wall injury. The neck of the hernia was 10 cm in diameter. We repaired this hernia with a polypropylene mesh.

Creep behavior of commonly used suture materials in abdominal wall surgery

BACKGROUND

The incidence of incisional hernia after abdominal wall closure is high. Furthermore, recurrence is a significant complication after correction of all abdominal wall hernias. Besides surgeon- and patient-related factors, in this experimental study a third factor, i.e., creep behavior of suture materials, is introduced and evaluated.

MATERIALS AND METHODS

Creep measurements were performed on 0 and 2-0 Prolene (Ethicon, Johnson & Johnson Intl., Somerville, NJ) and 1 and 2-0 PDSII (Ethicon, Johnson & Johnson Intl.) sutures. Two different loads were used representing normal intra-abdominal pressure (IAP) and pathological IAP. A mean percentage of elongation was calculated for each type of suture material. Statistical analysis was performed using analysis of variance.

RESULTS

All suture materials showed significant (3-51%) creep behavior. Prolene sutures showed more creep than PDSII sutures in both loading conditions.

CONCLUSIONS

As significant creep was demonstrated for commonly used suture materials, creep might be a significant influential factor with regard to the etiology of incisional hernias and recurrence after abdominal wall hernia repair.

Handlebar hernia: a case report

A 36-year-old man fell from his bicycle and struck his lower abdomen on the end of the handlebar. Computed tomography (CT) showed a small bowel loop protruding into the subcutaneous fat layer of the abdominal wall. We present this case of handlebar hernia, a rare type of traumatic abdominal wall hernia, and the usefulness of CT in diagnosing such injuries.

Traumatic Abdominal Wall Hernia: Epidemiology and Clinical Implications

BACKGROUND

Traumatic abdominal wall hernias (TAWHs) are uncommon, and it remains controversial whether such patients require urgent laparotomy. As such, this study was undertaken to assess the clinical sequelae of operative versus nonoperative management of TAWH, and whether certain patient or injury characteristics are predictive of the need for early surgery.

METHODS

Retrospective review of all patients presenting acutely with a TAWH at a Regional Trauma Center from January 2000 to December 2004.

RESULTS

Thirty-four patients were identified (age 39 +/- 12 years; Injury Severity Score 31 +/- 13). The most frequent mechanism of injury was motor vehicle collision (MVC; 24 cases), followed by motorcycle collision (6) and falls (4). The diagnosis of a TAWH was made primarily by computed tomography scan. Overall, 19 patients underwent urgent laparotomy or laparoscopy (56%) and 15 patients required bowel resection (44%). TAWH secondary to a MVC more frequently required urgent laparotomy and bowel resection than other mechanisms (p < 0.05). All three patients with clinically apparent anterior TAWH had intra-abdominal injuries and required urgent laparotomy. Only eight patients (24%) had their TAWH repaired acutely. At follow-up, two patients managed nonoperatively had symptomatic hernias, and three patients that had had an early repair had developed recurrent hernias.

CONCLUSIONS

First, the mechanism of injury should be considered when deciding if a patient with a TAWH needs an urgent laparotomy. Clinically apparent anterior TAWHs appear to have a high rate of associated injuries requiring urgent laparotomy. Finally, occult TAWHs diagnosed only by computed tomography may not require urgent laparotomy or hernia repair.

Closure of fascial defect at trocar sites after laparoscopic surgery

As laparoscopic surgery evolves, a growing number of different abdominal operations can now be performed. This necessitates the use of multiple large trocars. Herniation through the fascial defect created by trocar entry in laparoscopic interventions has been reported at a rate of 1-6%. We describe a simple closure technique for fascial defects at trocar sites after laparoscopic surgery. To facilitate the closure of the fascial defects of > or = 10 mm trocar entry sites, the surgeon places the upper end of a dissecting forceps through the fascial defect and tilts it so that the abdominal of the peritoneum comes into contact with its flat surface. The assistant retracts the skin and subcutaneous tissue and the "J" needle with the appropriate suture material is then used to take a stitch through the fascia under direct vision. The sharp end of the needle is prevented from coming into contact with any deeper structure as it slides on the flat surface of the dissecting forceps. The stitch is then pulled up to lift the edge of the fascia and the needle is passed from the opposite edge of the fascia in the same manner and then the suture is ligated. The aforementioned technique is easy to perform and facilitates the closure of the fascial defect at trocar sites, and there is no extra cost for the procedure.

Hernia fibroblasts lack beta-estradiol-induced alterations of collagen gene expression

BACKGROUND

Estrogens are reported to increase type I and type III collagen deposition and to regulate Metalloproteinase 2 (MMP-2) expression. These proteins are reported to be dysregulated in incisional hernia formation resulting in a significantly decreased type I to III ratio. We aimed to evaluate the beta-estradiol mediated regulation of type I and type III collagen genes as well as MMP-2 gene expression in fibroblasts derived from patients with or without history of recurrent incisional hernia disease. We compared primary fibroblast cultures from male/female subjects without/without incisional hernia disease.

RESULTS

Incisional hernia fibroblasts (IHFs) revealed a decreased type I/III collagen mRNA ratio. Whereas fibroblasts from healthy female donors responded to beta-estradiol, type I and type III gene transcription is not affected in fibroblasts from males or affected females. Furthermore beta-estradiol had no influence on the impaired type I to III collagen ratio in fibroblasts from recurrent hernia patients.

CONCLUSION

Our results suggest that beta-estradiol does not restore the imbaired balance of type I/III collagen in incisional hernia fibroblasts. Furthermore, the individual was identified as an independent factor for the beta-estradiol induced alterations of collagen gene expression. The observation of gender specific beta-estradiol-dependent changes of collagen gene expression in vitro is of significance for future studies of cellular response.

Effect of lifestyle, gender and age on collagen formation and degradation

Historically, inappropriate lifestyle with an inadequate dietary intake of vitamin C has been associated with poor wound healing as a clinical manifestation of scurvy. In modern times, clinical evidence produced over the past few decades indicates that a modern lifestyle factor, such as smoking, together with biologic characteristics, like old age and male gender, are risk factors for abdominal wall hernia and recurrence. The pathologic pathways for these clinical observations are unclear. Yet, evidence from animal and human studies suggests that these exogenous and endogenous factors may have a negative impact on collagen metabolism, enhancing degradation and impairing formation.

Incisional hernia: a review

BACKGROUND

Otherwise known as post operative ventral hernia, incisional hernia is a common complication following abdominal surgery and is a significant cause of morbidity. This review examines incisional hernia from its historical perspective to the present.

METHOD

A Literature review of the topic was carried out using manual library search of journal articles on the topic published both locally and internationally. The search also made use of intemet material from Pubmed and Medline on relevant parts of the topic. All relevant articles from the reference lists of these papers were also studied.

RESULT

Incisional hernia is a common complication of abdominal surgery. Its incidence is about 1% following primary healing and increasing to about 11% with postoperative wound infection. The most consistent causative factor is wound infection and the incidence may rise to 30% after abdominal wound dehiscenece and resuture. It may be difficult to repair and a wide range of surgical procedures have been developed for such repair. The repair may be direct suture or prosthetic mesh using the open or laparoscopic technique. Prosthetic mesh has revolutionized the repair of incisional hernias. Laparoscopic repair, which was introduced in the 1990's, has been adjudged feasible, safe and as effective as the open methods of repair. Recurrence rates of up to 49% with direct suture repair have been reported. Open and laparoscopic mesh repair have recurrent rates of 0-10% and 0-9% respectively.

CONCLUSION

Despite improved surgical techniques and the use of prosthetic mesh incisional herniation remains a major problem for the general surgeon.

Midline abdominal wall closure: a new prophylactic mesh concept

BACKGROUND

Despite intense research efforts, incisional hernias continue to be a problem in patients who undergo laparotomy. This study was designed to reinforce the midline laparotomy closure by including a new prosthetic design between the edges of the surgical wound.

STUDY DESIGN

A midline incision was made in New Zealand white rabbits and closed by inserting a polypropylene strip, T-shaped in cross-section, between the incisional borders. The T was placed upside down such that the horizontal arm of the T, whose surface is coated with extra-low pore size expanded polytetrafluoroethylene, made contact with the visceral peritoneum. The mesh was secured by a mass polypropylene 3/0 running suture. Surgery outcomes in these animals were compared with those in which the surgical wound was closed by simple suture and with control, nonoperated animals.

RESULTS

The T-mesh induced an increased amount of scar tissue at the midline, where neoformed recipient tissue appeared around the polypropylene mesh filaments. The expanded polytetrafluoroethylene lamina became appropriately mesothelialized. Compared with the simple suture, the T-mesh provided a significant gain in biomechanical strength at postoperative week 6 (43.99+/-4.17 Newtons and 56.96+/-10.94 Newtons, respectively, p < 0.05). At 6 months, the strength of the reinforced wound even surpassed, although not significantly, that of the control intact abdominal wall (82.25+/-7.60 Newtons versus 79.55+/-11.46 Newtons). Data were expressed as mean +/- standard deviation.

CONCLUSIONS

The use of a nonabsorbable biomaterial for midline laparotomy closure significantly improves its biomechanical resistance. Used in high-risk patients or even prophylactically, this technique could reduce the incidence of incisional hernia.