Objective:To investigate the knee joint pain during running and its contributing factors among sailors on a long oceangoing voyage through questionnaire, so as to provide evidence for future preventive measures.Methods:After four months of voyage, a questionnaire survey was conducted on the knee joint pain during running and its contributing factors among sailors in the background of long oceangoing vessel protection operation. The questionnaire collected data regarding age, height, weight, body mass index (BMI), physical exercise history, knee joint pain history, single running duration, running frequency, running shoes, and warm-up before running. The runners were divided into two groups, namely knee joint pain group (pain group) and no knee joint pain group (painless group). The differences of the pain contributing factors between the two groups were compared.Results:In total, 122 valid questionnaires returned, 68 in the pain group and 54 in the painless group. The incidence rate of knee joint pain was 55.7 %. There was no statistically significant difference in age, height, weight, BMI, physical exercise history, running frequency, and running shoes between the two groups ( P>0.05). There were statistically significant differences in knee joint pain history, single running duration, and warm-up before running between the two groups ( P<0.05). Conclusion:Knee joint pain during running is common among sailors on a long oceangoing voyage. The knee injury is closely related to the history of knee pain, too long single running time, and no warm-up before running. It is suggested that sailors pay attention to quadriceps exercise, warm-up before running, and scientific planning of running on the long oceangoing voyage.

Objective:To investigate the knee joint pain during running and its contributing factors among sailors on a long oceangoing voyage through questionnaire, so as to provide evidence for future preventive measures.Methods:After four months of voyage, a questionnaire survey was conducted on the knee joint pain during running and its contributing factors among sailors in the background of long oceangoing vessel protection operation. The questionnaire collected data regarding age, height, weight, body mass index (BMI), physical exercise history, knee joint pain history, single running duration, running frequency, running shoes, and warm-up before running. The runners were divided into two groups, namely knee joint pain group (pain group) and no knee joint pain group (painless group). The differences of the pain contributing factors between the two groups were compared.Results:In total, 122 valid questionnaires returned, 68 in the pain group and 54 in the painless group. The incidence rate of knee joint pain was 55.7 %. There was no statistically significant difference in age, height, weight, BMI, physical exercise history, running frequency, and running shoes between the two groups ( P>0.05). There were statistically significant differences in knee joint pain history, single running duration, and warm-up before running between the two groups ( P<0.05). Conclusion:Knee joint pain during running is common among sailors on a long oceangoing voyage. The knee injury is closely related to the history of knee pain, too long single running time, and no warm-up before running. It is suggested that sailors pay attention to quadriceps exercise, warm-up before running, and scientific planning of running on the long oceangoing voyage.

Objective: To evaluate the effect of vascular localization using computerized tomography angiography (CTA) combined with refined three dimensional (3D) printing in guiding the resection and reconstruction of complex oral cancer. Methods: From December 2013 to July 2017, the clinical data of 30 patients with complex oral cancer enrolled in the Hunan Cancer Hospital were retrospectively analyzed. 15 patients received CTA+ 3D assisted surgery, while the other 15 patients underwent traditional surgery. In CTA+ 3D assisted surgery group, CT and Magnetic Resonance Imaging (MRI) data were combined with CTA to print refined solid 3D model and surgical guide plate. The preoperative and intraoperative virtual surgical system and the operative experience were combined for preoperative evaluation and surgery. In traditional surgery group, preoperative evaluation and surgery were performed according to imaging data and surgeons′ clinical experience. Operative time, intraoperative blood loss, hospital stay and local recurrence rate were compared between the two groups. Results: In CTA+ 3D assisted surgery group, one patient gave up surgical treatment after intuitively watching the lesion through the 3D model, and the remaining 14 patients underwent surgery as planned. All the 15 patients in traditional surgery group received surgery. But the preoperative plans of three patients were temporarily and passively modified due to insufficient preoperative evaluation. The average intraoperative blood loss was(320.1±27.2)ml in CTA+ 3D assisted surgery group and(430.2±30.3)ml in traditional surgery group. Mean operation time was(440.3±19.2)min and(552.2±23.3)min, respectively. Mean hospitalization time was (20.4±3.2)d and (25.1±3.7)d, respectively. The differences were all statistically significant (all P<0.05). 1 year and 3 years local recurrence rates were 9.1% and 28.6% in CTA+ 3D assisted surgery group, as well as 14.3% and 50.4% in traditional surgery group with statistical significance (P<0.05). Conclusion For complex oral cancer patients with difficulty in opening the mouth or postoperative recurrence, CTA vascular localization combined with fine 3D printing technology has significant advantages in the surgical process, surgical effect and postoperative evaluation index compared with traditional method using imaging data and clinical experience.

To evaluate the effect of vascular localization using computerized tomography angiography (CTA) combined with refined three dimensional (3D) printing in guiding the resection and reconstruction of complex oral cancer. Methods From December 2013 to July 2017, the clinical data of 30 patients with complex oral cancer enrolled in the Hunan Cancer Hospital were retrospectively analyzed. 15 patients received CTA+3D assisted surgery, while the other 15 patients underwent traditional surgery. In CTA+3D assisted surgery group, CT and Magnetic Resonance Imaging (MRI) data were combined with CTA to print refined solid 3D model and surgical guide plate. The preoperative and intraoperative virtual surgical system and the operative experience were combined for preoperative evaluation and surgery. In traditional surgery group, preoperative evaluation and surgery were performed according to imaging data and surgeons′clinical experience. Operative time, intraoperative blood loss, hospital stay and local recurrence rate were compared between the two groups.Results In CTA+3D assisted surgery group, one patient gave up surgical treatment after intuitively watching the lesion through the 3D model, and the remaining 14 patients underwent surgery as planned. All the 15 patients in traditional surgery group received surgery. But the preoperative plans of three patients were temporarily and passively modified due to insufficient preoperative evaluation. The average intraoperative blood loss was(320.1±27.2) ml in CTA+3D assisted surgery group and(430.2± 30.3)ml in traditional surgery group. Mean operation time was( 440.3± 19.2) min and(552.2± 23.3) min, respectively. Mean hospitalization time was (20.4±3.2) d and (25.1± 3.7) d, respectively. The differences were all statistically significant ( all P＜0.05). 1 year and 3 years local recurrence rates were 9.1% and 28.6% in CTA+3D assisted surgery group, as well as 14.3% and 50.4% in traditional surgery group with statistical significance (P＜0.05). Conclusion For complex oral cancer patients with difficulty in opening the mouth or postoperative recurrence, CTA vascular localization combined with fine 3D printing technology has significant advantages in the surgical process, surgical effect and postoperative evaluation index compared with traditional method using imaging data and clinical experience.

To evaluate the effect of vascular localization using computerized tomography angiography (CTA) combined with refined three dimensional (3D) printing in guiding the resection and reconstruction of complex oral cancer. Methods From December 2013 to July 2017, the clinical data of 30 patients with complex oral cancer enrolled in the Hunan Cancer Hospital were retrospectively analyzed. 15 patients received CTA+3D assisted surgery, while the other 15 patients underwent traditional surgery. In CTA+3D assisted surgery group, CT and Magnetic Resonance Imaging (MRI) data were combined with CTA to print refined solid 3D model and surgical guide plate. The preoperative and intraoperative virtual surgical system and the operative experience were combined for preoperative evaluation and surgery. In traditional surgery group, preoperative evaluation and surgery were performed according to imaging data and surgeons′clinical experience. Operative time, intraoperative blood loss, hospital stay and local recurrence rate were compared between the two groups.Results In CTA+3D assisted surgery group, one patient gave up surgical treatment after intuitively watching the lesion through the 3D model, and the remaining 14 patients underwent surgery as planned. All the 15 patients in traditional surgery group received surgery. But the preoperative plans of three patients were temporarily and passively modified due to insufficient preoperative evaluation. The average intraoperative blood loss was(320.1±27.2) ml in CTA+3D assisted surgery group and(430.2± 30.3)ml in traditional surgery group. Mean operation time was( 440.3± 19.2) min and(552.2± 23.3) min, respectively. Mean hospitalization time was (20.4±3.2) d and (25.1± 3.7) d, respectively. The differences were all statistically significant ( all P＜0.05). 1 year and 3 years local recurrence rates were 9.1% and 28.6% in CTA+3D assisted surgery group, as well as 14.3% and 50.4% in traditional surgery group with statistical significance (P＜0.05). Conclusion For complex oral cancer patients with difficulty in opening the mouth or postoperative recurrence, CTA vascular localization combined with fine 3D printing technology has significant advantages in the surgical process, surgical effect and postoperative evaluation index compared with traditional method using imaging data and clinical experience.