Bruce W. Richman

Disruption and infection of median sternotomy: a comprehensive review

Disruption and infection of median sternotomy wounds are grave complications often associated with prolonged hospitalization, high cost, and significant mortality. Effective prevention techniques are still debated. Successful management requires early recognition based on a high index of suspicion, detailed physical examination, appreciation of the clinical signs and symptoms, timely imaging studies, and prompt surgical therapy. Improvements in perioperative management and critical care of patients with multisystem organ failure can reduce morbidity and mortality rates. Sternal salvage and direct sternal reclosure are possible when the infection is diagnosed early. Techniques utilizing lateral sternal support should be first-line options in the condition. Muscle flap techniques should be the next consideration when direct closure has failed or cannot be attempted.

Mesenteric cystic lymphangioma

ILLUSTRATIVE CASE REPORT A 35-year-old male patient presented to the Emergency Department complaining of an increasingly painful abdominal mass. The mass had been present for 4 weeks, markedly enlarging during that period. The past medical history was otherwise unremarkable. Physical exam revealed a moderately distressed patient. His arterial blood pressure was 110/70 mmHg, pulse rate 100 beats/ minute, respirations 24/minute, and surface temperature normal. The lung fields were clear on auscultation. A baseball-sized, nonmobile, hard, and extremely tender mass was palpable in the right lower abdomen. Bowel sounds were hypoactive; both the rest of abdomen and digital rectal examination were unremarkable. Laboratory results were within normal limits. The chest x-ray was normal. Plain abdominal films suggested a soft tissue mass in the right mid-abdomen. CT scan showed a large cyst, possibly originating in the small intestine (Fig. 1). Surgery was planned and the patient was managed with analgesics and bowel preparation for the rest of the day. Exploratory laparotomy revealed a pedicled cyst in the mesentery of the terminal ileum measuring 30 12 10 cm, with dense adhesions to this and adjacent bowel loops. The cyst’s wall was dark brown and glistening; no enlarged lymph nodes were found. The rest of abdomen was normal and without free intraabdominal fluid. The mass was resected and the abdomen closed in layers. The postoperative course was unremarkable. Pathologic examination of the resected specimen revealed a cystic mass containing clear yellow fluid, which was cultured and yielded no bacterial growth (Fig. 2). Microscopically, the cyst wall showed attenuated endothelial lining positive for CD 31, smooth muscle fibers, and fibrovascular adipose tissue (Fig. 3). Lymphocytic aggregates were seen throughout the cyst wall, with diffuse chronic inflammatory infiltration below the endothelial lining (Fig. 4). Based on these findings, the final diagnosis of mesenteric cystic lymphangioma was made.

Primary closure of median sternotomy: techniques and principles

Understanding the biomechanics of midline sternotomy repair is important to successful surgical outcome. High-risk patients, particularly those with immunosuppression, diabetes, and osteoporosis, should be identified. Details of technique should be monitored, and closure should incorporate lateral support of the sternum in patients at risk. Sternal dehiscence can occur under physiologic loads. Closure techniques and materials should insure stable repair, with avoidance of material migration through the bone.

Biomechanical comparison of median sternotomy closures.

BACKGROUND Poor healing of median sternotomy can significantly increase morbidity, mortality, and hospital costs. Effective union requires reliable sternal fixation. Although wire has proven the most reliable and widely used sternotomy closure material, no experimental studies have compared a large variety of wiring techniques in a human model. We developed an easily reproducible experimental model using cadaveric human sterna and compared several wiring methods to assess closure strength and stability. METHODS Fifty-three fresh adult human cadaveric sternal plates with adjacent ribs were fixed with specially designed spiked stainless steel clamps and attached to a texture analyzer. Single peristernal and transsternal, alternating single peristernal and transsternal, figure-eight peristernal, figure-eight pericostal, and Robicsek closures using no. 5 stainless steel wires were tested. We evaluated bone density, stiffness, and displacement using perpendicular, repetitive variable force loads of 800 Newtons cycling at a rate of 0.5 mm/s. RESULTS There were no significant differences in age, sex, or bone density in outcome measures of the sternal groups. No clamp failures or clamp damage to the specimens occurred. The single peristernal and alternating peristernal and transsternal closures proved superior in strength and stability (p < 0.001). The figure-eight peristernal, then the single transsternal, then the Robicsek were next stablest groups in decreasing order. The figure-eight pericostal closure had the highest failure rate (p < 0.001). CONCLUSIONS This novel model of sternotomy closure testing was reliable, inexpensive, and easily reproducible. The mechanical stability of peristernal and alternating peristernal and transsternal wires was significantly greater than that of the other tested methods. Pericostal figure-eight closures were not sufficiently stable to be considered a reliable method of primary sternotomy repair.

Holmium: YAG laser transmyocardial revascularization relieves angina and improves functional status

BACKGROUND Transmyocardial revascularization (TMR) surgery uses laser channeling of diseased myocardium to treat ischemia and angina. Rigorous prospective randomized studies have been previously unavailable. METHODS Forty-three patients were randomized to a medication group and 43 to a group scheduled for TMR surgery and medication. All had advanced cardiac ischemia with CCSA class 3 or 4 angina, took at least 2 cardiac medications at maximum doses, and were ineligible for angioplasty or bypass. RESULTS Forty-two of 43 TMR group patients received surgery and were discharged after hospitalizations averaging 3.2 days. Two suffered perioperative MIs, with one death. Four others died within 12 months of surgery, 3 from cardiac events and 1 from pneumonia. Five medical group patients died from cardiac events within 12 months. Three, 6, and 12 month exams showed angina class improvement in TMR patients compared to preoperative values (3.86 +/- 0.05 vs 1.71 +/- 0.2, P < 0.0001), and to controls at 12 months (3.77 +/- 0.07 vs 1.71 +/- 0.2, P < 0.0001). Exercise tolerance improved in TMR patients over preoperative values, and was better than medication group scores after 12 months (490 +/- 17 sec. vs 294 +/- 12 sec., p = 0.0002). CONCLUSIONS Holmium:YAG laser channeling of the myocardium improves function and reduces angina in advanced cardiac patients who lack alternative therapeutic options.

Spigelian hernia in a child: case report and review of the literature

Abstract. Spigelian hernias (SHs) are rarely observed among children. The diagnosis is not difficult to make once it has been considered. The condition requires a high index of suspicion because of its high potential for life-threatening complications. A 12-year-old boy underwent open appendectomy for presumed acute appendicitis. A normal appendix found at laparotomy suggested another etiology for the acute abdomen. Incarceration of the greater omentum in a spigelian hernia was found, and the hernia repaired. The repair of pediatric SH is straightforward and utilizes endogenous tissues. Patients should be followed up for as long as possible to develop data on the durability of the repair technique selected.

Recurrent intercostal herniation of the liver

Abdominal intercostal hernia occurs rarely, with only 26 previous cases reported in the professional literature. A 51-year-old man presented with a painful right chest protrusion. One year earlier he had experienced a severe coughing spell and spontaneous rib fracture and chest protrusion. He was treated with endogenous tissue reinforcement and had no clinical improvement. Magnetic resonance imaging revealed the liver protruding through the chest wall. The hernia was reduced and the chest wall was repaired with prosthetic mesh and cables. Attention to the chest wall anatomy and reliable tissue closure including pericostal or transcostal nonabsorbable sutures and a prosthetic bridge over the defect are the best way to eliminate the patients risk for recurrence.

Trocar-site hernia complicated by necrotizing fasciitis—case report and review of the literature

Only a few reports have been published describing necrotizing soft tissue infection (NSTI) following laparoscopic surgery; none identify trocar-site hernia as an etiologic factor. We present a case report and review of the literature. A 43-year-old previously healthy man underwent uneventful laparoscopic cholecystectomy. An unrecognized strangulated lateral trocar-site hernia resulted in fatal NSTI. A Medline database search (1966–2002) identifies ten detailed reports of NSTIs following laparoscopic surgery. Multiple risk factors were identified in almost all patients. The mortality rate was 20%. Patient survival from NSTI requires early recognition, aggressive surgical intervention, and intensive medical care. NSTI can occur following minimally invasive surgery, and physicians should maintain a high index of suspicion when patients begin to develop postoperative symptoms. Trocar-site hernia arises as another etiologic factor for NSTI in the domain of minimally invasive surgery.

Recurrent Spigelian hernia : a rare cause of colonic obstruction

Abstract. Spigelian hernia is considered a surgical rarity. Recent articles describe only six recurrent hernias and a scant number of patients with colonic obstruction resulting from incarceration. A patient with intestinal obstruction resulting from recurrent Spigelian hernia with strangulated colon is described. The patient underwent tension-free repair using a prosthetic mesh. Recent literature suggests that the deficiency of connective tissue in patients with hernias justifies the widespread use of permanent mesh for tissue reinforcement and avoidance of recurrences. The rare case presented should be regarded as an illustrative example for application of the tension-free repair principle in the definitive management of recurrent Spigelian hernia.

Parapubic hernia: case report and review of the literature

Abstract. Parapubic hernia is considered rare, with 18 hernias described in five articles published since 1971. The hernia results from iatrogenically or traumatically detached rectus abdominis muscles at the pubic bone and presents a therapeutic challenge because there is no strong aponeurotic anchoring structure in the defects caudal aspect. We describe a patient with a large parapubic hernia repaired by a combined preperitoneal and onlay prosthetic method. This report adds another dimension to the prosthetic repair options in parapubic hernias and illustrates the effectiveness of the tension-free repair principle in their definitive management.