Investigation of optimal time and monitoring parameters of ovariohysterectomy in accordance with dog size

The presented study was designed to determine optimal duration of ovariohysterectomy and changes in monitorization parameters during surgery. Materials and Methods: In this thesis, 30 dogs of different breed and age were groups according to their body weight. Group 1 (G1; n=10) was formed from dogs weighing less than 15 kg, group 2 (G2; n=10) between 15 to 29 kg and group 3 (G3; n=10) with dogs weighing ≥ 30 kg. Heart rate (HFr), respiratory rate (RFr), capillary refill time (CRT) and body temperature (T) scores were recorded before surgery. During surgery, HFr, blood pressure (S/D and mean), RFr, SPO2 and T were recorded. The aforementioned parameters were recorded every 10 minutes and at certain critical points during the operation (incision, reaching the left ovary, removing the left ovary, reaching the right ovary, removing the right ovary, reaching the cervix, placing the transfixation ligature, removal of the uterus and muscle/skin closure).Findings: There was statistical significance in the weight difference of the groups (P=0.0001). There were no differences between the pre-operative HFr, RFr, CRT and T values of the groups. The shortest time to reach critical points was at G1. HFr was found significantly higher in G1 than the other groups when reaching ovaries removal critical point. RFr, SPO2 and T parameters did not show any significant difference. There were no significances between HFr, RFr, SPO2 and T parameters in the 10-minutes interval recordings but there was significance between blood pressure parameters.Result: The surgery duration in G1 is shorter than other groups. Heart rate and blood pressure values had changes in both 10-minutes interval and critical point recordings.