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    Effects of whole blood, crystalloid, and colloid resuscitation of hemorrhagic shock on renal damage in rats
    (W B Saunders Co-Elsevier Inc, 2003) Önen, A; Çigdem, MK; Deveci, E; Kaya, S; Turhanoglu, S; Yaldiz, M
    Purpose: The aim of this study was to determine the effects of whole blood, crystalloid, and colloid treatment on histopathologic damage of kidney induced by hemorrhagic shock in rats. Methods: Fifty-six male Sprague Dawley rats were divided into 8 groups. The carotid artery was cannulated, and systolic arterial pressure (SAP), diastolic arterial pressure (DAP), heart rate (HR), and rectal temperature (RT) were observed during the procedure. The jugular vein also was cannulated, and the SAP was decreased by aspiration of 75% of blood through the jugular vein in the control (non resuscitated) and study (resuscitated) groups, whereas blood was not diminished in the sham group. The hemorrhagic shock was permitted to last 45 minutes; then, the study group rats were resuscitated with heparinized shed autologous whole blood (WB), normal saline (NS), Lactated Ringer's solution (LR), hydroxyethyl starch 6% (HES6), hydroxyethyl starch 10% (HES10), or dextran 40 (D40). Histopathologic evaluation was performed under light and electron microscope. Results: The RT, SAP, and DAP decreased, and HR increased significantly in the control and study groups during the shock period compared with those of sham group. After volume resuscitation, these parameters changed to preshock levels. Electron and light microscopic examinations of kidneys showed severe proximal tubular degeneration with moderate glomerular damage in the control group; moderate proximal tubular degeneration with mild glomerular damage in the NS, LR, HES6, and HES10 groups; and mild proximal tubular degeneration with no evidence of glomerular damage in the WB and D-40 groups. Conclusions: The characteristic ultrastructural features of hemorrhagic shock appear to be severe tubular degeneration and mild to moderate changes in glomeruli. Resuscitation of hemorrhagic shock with whole blood or dextran 40 solution appears to be most favorable therapy in preventing ultrastructural renal damage in rats.
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    Factors effecting morbidity in typhoid intestinal perforation in children
    (Springer-Verlag, 2002) Önen, A; Dokucu, AI; Çigdem, MK; Özturk, H; Otçu, S; Yücesan, S
    To determine the factors affecting morbidity in patients with typhoid intestinal perforation (TIP), 42 patients who had been operated upon for TIP between 1990 and 2000 were reviewed. The average age was 10.4 years, the male-to-female ratio 2.5/1. The mean interval from admission to operation was 6 h. Twenty-three children had multiple perforations. Primary closure (PC) was performed in 55% of the patients, ileostomy in 26%, and resection with anastomosis (RA) in 19%. Parenteral nutrition (PN) was available for 22 patients for an average of 9 days. Postoperative complications occurred more commonly in patients with delayed admission and/or severe peritonitis. Hospitalization was shorter and the postoperative complication rate lower in patients who received PN and in those who underwent ileostomy. None of the patients developed an enterocutaneous fistula. The 2 deaths (4.8%) resulted from overwhelming sepsis. The most significant factors affecting morbidity were prolongation of perforation-operation interval and severe peritonitis. No operative procedure is likely to be the best in all cases; therapy should be individualized. Ileostomy appears to be an effective procedure, particularly in patients with severe abdominal contamination and delayed presentation. The use of PN in addition to standard medical and surgical therapy in patients with TIP may be beneficial.
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    When to resect and when not to resect an asymptomatic Meckel's diverticulum
    (Springer-Verlag, 2003) Önen, A; Çigdem, MK; Öztürk, H; Otçu, S; Dokucu, AI
    To determine the morbidity and mortality of Meckel's diverticulum (MD) as a cause of acute abdominal disorders and to evaluate the relationship between patient age, MD complications, and postoperative complications. We reviewed 74 patients who underwent surgery between 1990 and 2000 for an acute abdominal syndrome with a MD diagnosed intraoperatively. Forty children were treated before 1995 and reviewed retrospectively, while the remaining 34 were reviewed prospectively. The average age was 4.8 years; the male/female ratio was 2.5/1; 34 (46%) were less than 2 years old, 32 were between 2 and 8 years, and 8 were older than 8 years. None of the symptoms was suggestive of the diagnosis of MD. Thirty-nine MDs were asymptomatic (21 intussusception, 18 volvulus), but all were the secondary cause of the acute abdomen. The remaining 35 children had a symptomatic MD (diverticulitis in 14, diverticular bleeding in 11, diverticular perforation in 10). The risk of complications due to a MD occurring in children under 2 years and between 2 and 8 years of age was significantly higher compared to children older than 8 years (P = 0.02). Postoperative complications occurred more commonly in children between 2 and 8 years of age compared to other patients. There is thus an increased risk of morbidity in a symptomatic MD in patients less than 2 and between 2 and 8 years of age, and there is no predictive factor for the development of diverticular complications. Resection of the MD is recommended in all children younger than 8 years, including asymptomatic ones, in the absence of absolute contraindications.