Objective To compare the dosimetry and treatment efficiency between a multi-ple partial volumetric-modulated arcs therapy (MP-VMAT)and double-arc volumetric modulated arc therapy (DA-VMAT)for patients with breast cancer mastecomy.Methods 19 patients with breast cancer treated by mastecomy and requiring postoperative radiotherapy were collected.MP-VMAT and DA-VMAT plans were applied for each patient respectively.Dosimetry parameters for target volume and organ of risks (OARs)were compared.Machine unite and delivery times were compared.Results MP-VMAT plans had a more uniform target dose distribution with average Conformation Index (CI )andHomogeneity Index (HI )of0 .5 6 and 1 .0 6 compared to 1 .0 6 and 1.14 of the DA-VMAT plans(P <0.05).MP-VMAT plans predicted a reduction of 5.53% in V20 of contralateral lung,3.74 Gy in mean dose,6.27% in V5 and 5.53% in V20 of ispleratal lung respectively (P <0.05).MP-VMAT plans predicted a reduction of 10.33% and 7.82% in V5 and V10 of heartrespectively (P <0.05),MP-VMAT plans predicted a reduction of 9.14%, 2.72% and 0.06% inV5,V10 and V15 of contralateral breast respectively (P <0.05)plans. However,MP-VMAT plans improved monitor units 7 4 5 .9 MU and treatment time 3 0 4 .6 s compared with DA-VMAT 524.4 MU and 196.7 s (P <0.05).Conclusion MP-VMAT plans generate more uniformity in the target dose and decreased the dose of most of organs of risk com-pared to the DA-VMAT,But improved monitor units and treatment time.In clinical application, different techniqies are chosen based on the situation of every patient.

Objective To discuss the clinical application of cluster nursing in bladder function recovery of cervical cancer patients with radiotherapy.Methods Ninety-four patients with cervical cancer receiving radiotherapy in our hospital from September 2016 to August 2017 were selected as observation group,and 70 patients from January to August 2016 were included in the control group.The control group treated by routine nursing care,while the observation group received cluster nursing.The incidence rate of urinary retention,the success rate of one-time extubation,bladder function recovery and pelvic floor muscle strength before discharge,and quality of life scores before and after radiotherapy were compared between the two groups.Results The incidence of urinary retention in the observation group was lower than that of the control group (4.3％ vs.14.3％,P ＜0.05).The success rate of one-time extubation was higher than that in the control group (94.7％ vs.85.7％,P ＜0.05).The bladder recovery rate was higher than that in the control group (94.7％ vs.83.4％,P ＜ 0.05).The pelvic floor muscle strength was obviously superior than that in the control group (P ＜ 0.05).Quality of life (QOL) score of two groups after treatment were higher than treatment before (P ＜ 0.05),and the observation group was higher than that in the control group (P ＜0.05).Conclusion Cluster nursing can effectively prevent the occurrence of postoperative urinary retention,improve bladder function recovery,and improve quality of life in patients with cervical cancer receiving radiotherapy,so it is worthy of clinical promotion.

Objective To discuss the clinical application of cluster nursing in bladder function recovery of cervical cancer patients with radiotherapy.Methods Ninety-four patients with cervical cancer receiving radiotherapy in our hospital from September 2016 to August 2017 were selected as observation group,and 70 patients from January to August 2016 were included in the control group.The control group treated by routine nursing care,while the observation group received cluster nursing.The incidence rate of urinary retention,the success rate of one-time extubation,bladder function recovery and pelvic floor muscle strength before discharge,and quality of life scores before and after radiotherapy were compared between the two groups.Results The incidence of urinary retention in the observation group was lower than that of the control group (4.3％ vs.14.3％,P ＜0.05).The success rate of one-time extubation was higher than that in the control group (94.7％ vs.85.7％,P ＜0.05).The bladder recovery rate was higher than that in the control group (94.7％ vs.83.4％,P ＜ 0.05).The pelvic floor muscle strength was obviously superior than that in the control group (P ＜ 0.05).Quality of life (QOL) score of two groups after treatment were higher than treatment before (P ＜ 0.05),and the observation group was higher than that in the control group (P ＜0.05).Conclusion Cluster nursing can effectively prevent the occurrence of postoperative urinary retention,improve bladder function recovery,and improve quality of life in patients with cervical cancer receiving radiotherapy,so it is worthy of clinical promotion.

Objective To compare the dosimetry and treatment efficiency between a multi-ple partial volumetric-modulated arcs therapy (MP-VMAT)and double-arc volumetric modulated arc therapy (DA-VMAT)for patients with breast cancer mastecomy.Methods 19 patients with breast cancer treated by mastecomy and requiring postoperative radiotherapy were collected.MP-VMAT and DA-VMAT plans were applied for each patient respectively.Dosimetry parameters for target volume and organ of risks (OARs)were compared.Machine unite and delivery times were compared.Results MP-VMAT plans had a more uniform target dose distribution with average Conformation Index (CI )andHomogeneity Index (HI )of0 .5 6 and 1 .0 6 compared to 1 .0 6 and 1.14 of the DA-VMAT plans(P <0.05).MP-VMAT plans predicted a reduction of 5.53% in V20 of contralateral lung,3.74 Gy in mean dose,6.27% in V5 and 5.53% in V20 of ispleratal lung respectively (P <0.05).MP-VMAT plans predicted a reduction of 10.33% and 7.82% in V5 and V10 of heartrespectively (P <0.05),MP-VMAT plans predicted a reduction of 9.14%, 2.72% and 0.06% inV5,V10 and V15 of contralateral breast respectively (P <0.05)plans. However,MP-VMAT plans improved monitor units 7 4 5 .9 MU and treatment time 3 0 4 .6 s compared with DA-VMAT 524.4 MU and 196.7 s (P <0.05).Conclusion MP-VMAT plans generate more uniformity in the target dose and decreased the dose of most of organs of risk com-pared to the DA-VMAT,But improved monitor units and treatment time.In clinical application, different techniqies are chosen based on the situation of every patient.

Objective To explore the effects of Pender health promotion mode on the compliance of mouth opening training, and reduce the of difficulty of mouth opening in patients with nasopharyngeal carcinoma after radiotherapy. Methods Totally 100 patients with nasopharyngeal carcinoma and treated with radiotherapy were randomly divided into the control group and the study group, with 50 cases in each group. Patients in the control group received routine opening training guidance, while patients in the study group received Pender health promotion model for nursing intervention based on the routine guidance. Results The compliance of patients in the study group was better than that in the control group six months after radiotherapy ( U=236.3,P<0. 01) . The incidence of difficulty of mouth opening in the study group was lower than that in the control group six months and one year after radiotherapy (U=287.0,334.5;P<0.01).Conclusions The Pender health promotion model comprehensively analyzes the influencing factors of patients with nasopharyngeal carcinoma. Nursing intervention measures for patients with nasopharyngeal carcinoma has important significance in promoting open mouth training compliance and reducing the incidence of difficulty in opening mouth after radiotherapy.