Effects of Aneurysmal Neck Angle on Stent Displacement after Endovascular Repair of Abdominal Aortic Aneurysm / 医用生物力学

Objective To study the effects of aneurysmal neck angle on stent displacement after endovascular repair of abdominal aortic aneurysm (AAA). Methods The CT images of 28 patients were selected to establish preoperative AAA model, postoperative AAA model and covered stent model respectively, and the models were divided into non-severe angulation group ( n = 14) and severe angulation group ( n = 14) according to the preoperative angle of tumor neck. The geometric shape of each model was measured, and the changes of AAA geometric parameters and postoperative stent displacements before and after surgery were analyzed. The displacement force of the model during the first follow-up was calculated by hemodynamic simulation. Results Significant differences were found in tumor length, maximum diameter, displacement force, tumor neck length and tumor volume between two groups of patients (P 0. 05). For the incidence of internal leakage, there were 2 cases in non-severe angulation group and 4 cases in severe angulation group (P>0. 05).Conclusions Severe neck angulation can lead to a significant increase in support displacement force and decrease in proximal anchorage zone, and thus increase the possibility of support displacement. It is suggested that doctors should strengthen postoperative follow-up for patients with severe neck angulation and be vigilant of the occurrence of long-term internal leakage in clinic.

Facial Angle Profiles in Turkish Healthy Population

The knowledge of the facial angles is essential for safe and accurate plastic surgery interventions. Facial angles are used as a reference value for comparison during diagnosis and treatment planning. Also, the facial angles will provide valuable data in evaluation of facial aesthetics. So, the aim of this study was to determine the ideal values of the facial angles in Turkish healthy adults.METHODSTwo hundred and forty seven (129 females; 118 males) subjects aged between 18 and 25 years were included in this study. Frankfort horizontal plane was chosen to determine the angles related with face. Photographs were acquired using a Digital SLR Camera with fixed shooting values. (Canon EOS 80D; ISO 100 f/4.5). In all the shoots, a printed scale with known dimensions was present. Acquired images were then transferred to a computer station. Measurements were made using Image J 1.52a with 1/100 mm sensitivity. Statistical analysis was done using SPSS Ver. 22.00. A p<0.05 value was considered as significant. Student’s T Test was used to determine the significance between gender, while Pearson Correlation analysis was done to evaluate the relation between gender.RESULTSStatistically significant difference was found between the genders and the frontonasal angle, the nasofrontal angle, the nasolabial angle, the chin neck angle, and the nasal projection. Also, the fronto nasal angle, chin neck angle, and nasal projection measurements were higher in males than in females, whereas the nasofrontal angle and nasolabial angle were lower in males than in females. Additionally, there was a significant, negative very low correlation between fronto-nasal angle (-0.148), chin-neck angle (r=-0.179) and gender; a significant, negative and low correlation (r=-0.243) between nasal projection and gender, a significant, positive and low correlation between nasolabial angle and gender (r=0.259); and nasofrontal angle and gender (r=0.388).CONCLUSIONSFacial angle values of healthy population provide important and useful knowledge in terms of comparison of abnormalities clinically, and data may be valuable for the representatives of clinical disciplines.

Vertical Neck angle and long-term outcomes of femoral neck fractures treated with cannulated screws / 中华创伤骨科杂志

Objective To analyze the associations between long-term outcomes of fresh femoral neck fractures treated with cannulated screws and the classification based on vertical neck (VN) angle.Methods A retrospective study was conducted of the 162 fresh femoral neck fractures treated with 3 cannulated screws at Department of Orthopaedics,The Sixth People's Hospital of Shanghai from January 2012 to December 2014.The relationships were analyzed using Logistic Regression between long-term complications and VN classification,including fixation failure,fracture nonunion and osteonecrosis of femoral head (ONFH).Results All the patients were followed up for an average of 25.7 months (from 6 to 36 months).Of them,151 obtained fracture union after an average of 4.5 months (from 3 to 9 months).Internal fixation failure occurred in 23 cases,nonunion of femoral neck in 11,ONFH in 21 and femoral neck collapse in 13.Logistic Regression analysis showed no significant associations between internal fixation failure,nonunion or ONFH and gender,age or reduction method (P ＞ 0.05) but significant associations of VN classification with fixation failure (P ＜ 0.001) and nonunion (P =0.001) and insignificant association of VN classification with ONFH (P =0.109).Conclusion VN classification,a new classification method for femoral neck fractures,may be closely related with incidences of fixation failure and nonunion.

Assessment of Relationship Between Neck Shaft Angle and Neck Length with Interepicondylar Distance in Femur.

Background: Femur is the longest and strongest bone of the body. It transmits body weight from hip bone to tibia in standing position. Femoral neck is a constricted part connecting head with shaft at an angle of about 125°- known as angle of inclination or neck shaft angle (NSA); this facilitates the movement of hip joint enabling the limb to swing clear of pelvis. Abnormal femoral neck angle (FNA) may be associated with various clinical problems ranging from harmless in toeing gait in childhood to disabling osteoarthritis in adults. The current study attempted to find out if a co-relation exists between those parameters and other clinically measurable variables like inter-epicondylar distance or distance between greater trochanter to lateral epicondyle. This may help to predict the risk of fracture neck femur without any risk of radiation exposure and proper prophylactic measures can be undertaken (Vit-D, calcium) to decrease risk of fracture. Results: Measurements were taken in dry femora mostly in East Indian population. Variables that were measured in 158 dry femora (85 femora from left side and 73 from the right side) are: - a) Neck shaft angle of femur, b) Neck length of femur, c) Neck circumference of femur, d) Inter-epicondylar distance of femur, e) Distance between lateral epicondyle and greater trochanter of femur. No significant difference was found between the right and left sided femoral groups regarding any of the study variables. From the analysis it was revealed that no positive or negative correlation exists between the study variables. Therefore, it is not possible to predict the value of one or more of them from the magnitude of the other variable(s). Conclusions: Our study attempted to find out if it was possible to predict the risk of fracture neck femur by simple clinical procedure without exposing the subjects to radiation hazards associated with a radiological imaging. A screening test and subsequent prophylactic measures could have been suggested to prevent the fracture. However, at the end of the study, no suitable alternative to the radiological assessment was detected.

Effect of Pregnancy and Delivery on the Pelvic Floor Function / 实用妇产科杂志

Objective:To investigate the change of petvic floor function in the third trimester of pregnancy and early postpartum.Methods :46 pregnant women in the third trimester in our hosprtal from July to October 2007 were randomly selected.In late pregnancy, 6 ～8 weeks and 12 ～14 weeks after delivery, the incidenca of stress urinary incontinence (SUI) and bladder neck mobility in different stage of puerperium was carried out.They were respectively given score, protectrve pad experiment, ultrasonic testing residual urine and peri-neum ultrasound examination.An anarysis on their.Results :The incidence of SUI that diagnosis by POP-Q or POP-Q combined with pat test was 47.83% ,39.13% respectively in late pregnancy group;21.74% ,15.22% in 6 ～8 weeks after delivery;17.24%.13.7g% in 12 ～14 weeks after delivery.The difference between late pregnancy group and 6～8 waeks after delivery group was statistical significance (P<0.05).There was no significantly difference between 6 ～8 weeks and 12 ～14 weeks after delivery groups(P>0.05).There was significant difference between 6 ～ 8 weeks and 12～14 weeks after delivery group while compared the bladder neck angle[(88.11± 13.36)° vs(82.17 ±10.28)°]with the bladder neck rotation angle[(21.67 ±10.64) ° vs (16.79±8.57) °].Conclusions :Pregnancy and delivery can damage the function of pelvic floor, which has certain rehabilitation after delivery.