title: Determination of operation time in colorectal diseases: preoperative chemotherapy application.
abstract: BACKGROUND
  Our aim was to determine the time it takes for wound healing to return to normal in cases where patients have undergone preoperative chemotherapy.
  
  
  METHODS
  Eighty-four Wistar-albino rats were included in the study. Twelve of them were placed in the control group (Group I), with no further drug administration. Another 12 rats were placed in a sham group (Group II) and were peritoneally injected with 1 cc of isotonic saline solution 5 days a month, for a period of 6 months. The remaining 60 rats were placed in five chemotherapy groups (Groups III-VII) and were administered 20 mg/kg 5-fluorouracil through peritoneal injection, 5 days a month for a period of 6 months. At the end of the sixth cure, 12 rats from the control (Group I), sham (Group II), and chemotherapy groups (Group III) were operated on, and an intestinal transsection was applied to the rectosigmoid junction, followed by one-by-one anastomosis using 5/0 vicryl. Other groups (Groups IV-VI) with chemotherapy treatment were operated on at 1-week intervals and subjected to the same procedure. The subjects were reoperated on on the eleventh day. A full-layer 4 x 4 cm piece was removed from the abdominal wall containing the previous incision line at the middle, for tensile strength pressure measurements. In addition, a 4 cm colon segment was removed for bursting pressure measurements. Plasma albumin and tissue hydroxyproline levels were measured, and fibroblast numbers were counted in the sections prepared from the abdominal wall.
  
  
  RESULTS
  The control and sham groups were found to be similar to each other with respect to all parameters measured (P > 0.05). Significant reductions were observed in all parameters in the early chemotherapy groups compared with the control and sham groups (P <0.05). All parameters measured in Groups V, VI, and VII were found to be similar to those in the control and sham groups (P <0.05).
  
  
  CONCLUSIONS
  Wound healing is impaired in rats with chemotherapy, but following the second week after the chemotherapy, disrupted parameters return to their normal levels.
authors.affiliation: Meram Medical Faculty, Selcuk University, Konya, Turkey.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Sahin
authors.forename: Mehmet
authors.initials: M
authors.lastname: Erikoglu
authors.forename: Sükrü
authors.initials: S
authors.lastname: Ozer
authors.forename: Ahmet
authors.initials: A
authors.lastname: Tekin
authors.forename: Serkan
authors.initials: S
authors.lastname: Boz
authors.forename: Murat
authors.initials: M
authors.lastname: Gölcük
authors.forename: Mustafa C
authors.initials: MC
authors.lastname: Avunduk
authors.forename: Mehmet
authors.initials: M
authors.lastname: Aköz
mesh_terms: D034861:Abdominal Wall / Q000473:pathology; D000818:Animals; D000964:Antimetabolites, Antineoplastic / Q000494:pharmacology*; D015179:Colorectal Neoplasms / Q000188:drug therapy* / Q000401:mortality / Q000601:surgery*; D003131:Combined Modality Therapy; D005260:Female; D005347:Fibroblasts / Q000473:pathology; D005472:Fluorouracil / Q000494:pharmacology*; D006909:Hydroxyproline / Q000378:metabolism; D007958:Leukocyte Count; D011300:Preoperative Care; D051381:Rats; D017208:Rats, Wistar; D012709:Serum Albumin / Q000378:metabolism; D013997:Time Factors; D014945:Wound Healing / Q000187:drug effects*
chemical_list: D000964:Antimetabolites, Antineoplastic; D012709:Serum Albumin; D006909:Hydroxyproline; D005472:Fluorouracil