ABSTRACT
Objective To measure the placing position error of different body position by analog positioning machine in patients with different body mass index (BMI) during radiotherapy for rectal cancer, then calculate the clinical target volume (CTV) to plan target volume (PTV) margins (Mptv). Methods Thirty-six patients with rectal cancer were selected, and the patients were divided into vacuum bag group (18 cases) and routine belly board group (18 cases) according to method of placing position. The BMI was calculated. Each patient was treated with positive and lateral position X-ray film before treatment and once a week during the radiotherapy. The data were contrasted with digitally rendered radiographs (DRR) of three-dimensional conformal radiotherapy plan system, then the placing position error on X, Y and Z axis was calculated, and the Mptv on X, Y and Z axis of patients with different BMI was calculated. Results The placing position error on X, Y and Z axis gradually increased with the increase of BMI in vacuum bag group and routine belly board group, and there were statistical differences (P<0.01 or <0.05). The Mptv on X, Y and Z axis in patients with normal BMI were 4.60, 5.51 and 5.29 mm respectively. The Mptv on X, Y and Z axis in patients with overweight were 5.48, 6.81 and 6.16 mm respectively. The Mptv on X, Y and Z axis in patients with obesity were 8.92, 8.59 and 7.02 mm respectively. Conclusions The rectal cancer patients with overweight and obesity have more placing position error. The influence of BMI should be considered when the patient's Mptv is determined.
ABSTRACT
Objective To investigate the efficacy and safety of tropisetron combined with sulpiride in treatment of chemotherapy-induced cisplatin program nausea and vomiting,so as to explore the effect to motilin and gastrin.Methods A total of 84 patients with chemotherapy-induced cisplatin program nausea and vomiting were divided into study group (44 cases) and control group (40 cases) by random digits table method,the patients in two groups were given tropisetron hydrochloride intravenous injection,and the study group was added sulpiride.The efficacy and side effects and effect to motilin and gastrin were observed.Results The fully control rate and efficient rate in acute nausea was 59.09％ (26/44),37.50％ (15/40),and 90.91％ (30/44),72.50％ (29/40) in study group and control group,and there was significant difference (P ＜ 0.05).The fully control rate and efficient rate in acute vomiting was 61.36 ％ (27/44),37.50％ (15/40),and 88.64％ (39/44),67.50％ (27/40) in study group and control group,and there was significant difference (P ＜0.05).The fully control rate and efficient rate in delayed nausea was 54.54％ (24/44),32.50％ (13/40),and 79.55％ (35/44),57.50％ (23/40) in study group and control group,and there was significant difference (P ＜ 0.05).The fully control rate and efficient rate in delayed vomiting was 45.45 ％ (20/44),22.50％ (9/40),and 75.00％ (33/44),52.50％ (21/40) in study group and control group,and there was significant difference (P＜ 0.05).The plasma motilin after treatment was lower than that before treatment in study group and control group[(308.35 ± 14.59) ng/L vs.(370.59 ± 15.72) ng/L and(341.87 ± 18.38) ng/L vs.(365.36 ± 23.72) ng/L],gastrin was higher than that before treatment in study group and control group [(206.97 ± 12.29) ng/L vs.(164.56 ± 14.17) ng/L and (171.58 ± 13.53) ng/L vs.(158.42 ± 17.29) ng/L],and there was significant difference (P ＜ 0.05).There was significant difference in the plasma motilin and gastrin after treatment between two groups (P ＜ 0.05).There was no significant difference in the occurrence of adverse drug reactions between two groups (P ＞ 0.05).Conclusion Tropisetron combined with sulpiride than the routine use of tropisetron can obtain the better the antiemetic effect.