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Biomedical subjects

I Hamzaoğlu

Publications and source records attributed to I Hamzaoğlu.

5 recordsLinked to original sources
PubMed2005

Are clips useful in the surgical repair of colonic perforations?

PURPOSE: The objective of this study was to assess the effecacy of clip application in the surgical repair of iatrogenic colonic perforations. MATERIAL AND METHODS: Twenty adult male Wistar-Albino rats were divided into two equal groups of ten. In both of the groups an iatrogenic perforation was made in the anti-mesenteric border of the left colon. The defect was closed with interrupted 6/0 polypropylene sutures in group 1 and extraluminal application of vascular clips (VCS--vascular clip system) in group 2. All animals were killed on postoperative Day 4. Wound healing was evaluated with both in situ bursting pressure and hydroxyproline levels. RESULTS: There was no statistically significant difference between the two groups in respect of bursting pressure levels (p = 0.063) whereas hydroxyproline levels were higher in group 2 (p = 0.0021). CONCLUSIONS: Surgical repair of iatrogenic colonic perforations by extraluminal clips gives comparable results according to wound healing parameters. This approach may be a rational alternative to suture or endoscopic repair methods.

Animals↗
PubMed2000

Can laparoscopy be performed safely early after laparotomy?

Early subsequent laparotomy has high morbidity and mortality rates. The majority of these procedures, such as control of intraabdominal bleeding, management of intraabdominal sepsis, assessment of bowel viability, or anastomotic suture line, which are performed during early subsequent laparotomy, can be managed safely by laparoscopy, with resultant decreased mortality and morbidity rates. However, fear of dehiscence and ventral hernia prevents widespread use of laparoscopy. The aim of this experimental study was to compare the deleterious effects of subsequent laparotomy with laparoscopy in abdominal wounds during the early postceliotomy period. A 4-cm median laparotomy was performed in 120 Wistar-Albino rats that were classified into three groups. The control group (1) did not receive additional treatment. On the third postoperative day, early subsequent laparotomy and pneumoperitoneum were performed in group 2 and group 3 rats, respectively. Ten rats from each group were selected randomly and killed after 5 days, 1 week, 2 weeks, and 4 weeks. Bursting pressure and tensile strength of the abdominal wound were assessed. Results of the study showed impaired abdominal wound healing in subsequent laparotomy group rats (group 2) (P < 0.05). Pneumoperitoneum did not cause statistical differences in wound healing parameters when compared with control group rats (P > 0.05). In conclusion, pneumoperitoneum does not affect abdominal wound healing adversely, but early subsequent laparotomy impairs wound healing severely. Laparoscopy would be an alternative to high-risk early subsequent relaparotomy.

Analysis of Variance↗
PubMed1998

The effects of hyperbaric oxygen on normal and ischemic colon anastomoses.

BACKGROUND: Leakage from colonic anastomoses is a major complication causing increased mortality and morbidity, and ischemia is a well-known cause of this event. Inadequate tissue oxygenation could be reversed by using hyperbaric oxygen. This study was designed to investigate the effects of hyperbaric oxygen on the healing of ischemic and normal colon anastomoses in the rat model. METHODS: Standardized left colon resection 3 cm above the peritoneal reflection and colonic anastomosis were performed in 40 Wistar rats divided into four groups. The control group (I) received no further treatment. To mimic ischemia, 2 cm mesocolon was ligated on either site of the anastomosis in group II and IV rats. Hyperbaric oxygen therapy was started immediately after surgery in group III and IV rats (therapeutic groups). All animals were sacrificed on the fourth postoperative day. After careful relaparotomy, in situ bursting pressure was measured. The hydroxyproline contents of the anastomotic segments in equal length were determined. RESULTS: The hydroxyproline assay revealed that rats in group II with ischemic colonic anastomosis have significantly lower levels (P <0.05). The highest levels are in the group III rats with normal colonic anastomosis treated by hyperbaric oxygen (P <0.05). There was no significant difference in hydroxyproline levels between group II and group IV animals (P >0.05). Group III animals had significantly higher bursting pressures than any other group (P <0.05). Group II rats had lowest bursting pressures (P <0.05). Group IV animals had significantly higher levels than group II (P <0.05). Mean bursting pressure values both in groups III and IV and hydroxyproline levels in group III were significantly increased by hyperbaric oxygen therapy (P <0.05). CONCLUSIONS: Ischemia impairs anastomotic healing. Hyperbaric oxygen increases anastomotic healing of both normal and ischemic colonic anastomosis and reverses ischemic damage. This study demonstrated that hyperbaric oxygen improves anastomotic healing.

Anastomosis, Surgical↗