1.Treatment of fresh Monteggia fracture with steel-wire loop in adults whose annular ligament needs repairing
Mingke GUO ; Qi ZHANG ; Xiaobo WU ; Wei CHEN ; Yingze ZHANG
Chinese Journal of Orthopaedic Trauma 2010;12(3):201-203
Objective To assess the treatment of fresh Monteggia fracture with a steel-wire loop for adults whose annular ligament needs repairing. Methods From May 2006 to March 2008, we treated 15 adult patients with fresh Monteggia fracture whose annular ligament needed repairing with a steel-wire loop. A retrospective study was performed for the 15 cases, including 9 males and 6 females. Their ages ranged from 19 to 46 years. According to the Bado classification system, there were 6 cases of type Ⅰ, 4 type Ⅱ, 5 type Ⅲ. The ulnar fractures were treated with open reduction and compression plate fixation. Next, radial head dislocations were reduced openly and the reduced heads were hitched to the proximal end of the ulna with a steel-wire loop of 0.8 mm in diameter around the radial neck. Last, the broken annular ligaments were repaired. The elbow functional trainings were carried out 48 hours after operation and the steel-wire was removed 3 weeks postoperatively. Results The patients were followed up for 8 to 11 months (mean,9. 5 months). The functional recovery evaluated by Broberg and Morrey evaluation system showed excellent results in 11 patients, good in 2, fair in 2 and poor in 0. The excellent to good rate was 86. 7%.Conclusion The steel-wire loop treatment is a good strategy for adults with fresh Monteggia fracture whose annular ligament needs repairing.
2.Model establishment of posterior column fracture of the acetabulum and biomechanical evaluation of the stability between plate and lag screw internal fixation
Xiaobo WU ; Qi ZHANG ; Mingke GUO ; Wei CHEN ; Yingze ZHANG
Chinese Journal of Tissue Engineering Research 2009;13(52):10236-10240
BACKGROUND:Surgery has become gold standard to treat fracture of acetabulum.The incidence of posterior column fracture of affected acetabulum is high.The appropriate treatment for posterior column fracture of acetabulum remains controversial.OBJECTIVE:To establish the model of posterior column fracture of acetabulum,and evaluate the stability of internal fixation with the plate and lag screw for the posterior column fracture of acetabulum.METHODS:A total of 20 preserved cadaveric semipelvic specimens were randomly divided into two groups.Models of isolated posterior column fracture of acetabulum were established.The models were fixed with plate or lag screw.Under vertical compression load,the horizontal displacements of the fracture site were measured and the shear rigidity of two fixation conditions was compared.RESULTS AND CONCLUSION:The horizontal displacements of the fracture site fixed with plate and lag screw were (1.64±0.17) mm and (1.70±0.20) mm.The shear rigidity fixed with plate and lag screw were (392.40±41.22) N/mm and (386.33±50.07) N/mm.The differences of both horizontal displacements and shear rigidity between the two groups were not significant (P>0.05).The fracture model provides an ideal tool for biomechanical evaluation of the stability of internal fixation for the posterior column fracture of acetabulum.There was no significant difference in the stability of internal fixation with the plate and lag screw for the posterior column fracture of acetabulum.
3.Biomechanical comparison of 4 plate internal fixation methods for simulated fractures of acetabular posterior column
Xiaobo WU ; Qi ZHANG ; Mingke GUO ; Yingze ZHANG
Journal of Third Military Medical University 2003;0(07):-
Objective To evaluate the stability of 4 different methods of plate internal fixation for simulated posterior column fracture of the acetabulum.MethodsTwenty preserved cadaveric semipelvic specimens were divided into 4 groups randomly.Models of isolated posterior column fractures of acetabulum were established and then fixed with 1 of following 4 methods of plate internal fixation:2 screws at the each end of plate(group A),3 screws at the each end of plate(group B),1 screw each side in the closest allowable hole to the fracture and 2 screws at the each end of plate(group C),and 4 screws on each side of the fracture(group D).Under vertical compression load of 3 times' body weight,the displacements of the fracture site were measured and the shear rigidity of different internal fixation methods were compared.ResultsThe displacements of the fracture site in Group A,B,C,and D were 4.68?0.35,2.80?0.25,2.12?0.11 and 1.58?0.17 mm respectively,with a decreasing trend from Group A to D.The shear rigidity of internal fixation methods in Group A,B,C,and D were 129.42?9.60,228.91?12.05,285.21?26.16 and 414.71?34.29 N/mm respectively,with an increasing trend from Group A to D.The differences of both displacements and shear rigidity between each 2 groups were significant(P
4.Study on technique of phase detection in magnetic induction tomography
Xiaoyan HU ; Mingxin QIN ; Mingke JIAO ; Wenwen LIANG ; Hua ZHANG
Chinese Medical Equipment Journal 1989;0(04):-
In the magnetic induction tomography(MIT) system,the electrical conductivity of biological tissue is direct proportion to the phase difference between the excitation signal and the detection signal.To obtain the image of the contribution of tissue's electrical conductivity,the system must have the function of phase detection with high accuracy.The paper focuses on the means of digital phase detection,including FFT method,the correlation method and the classic method,which are ultimately compared with analogue phase detection method.The experimental results show that FFT method and the correlation method,with low error level and high linearity,can better detect the phase difference with the level of 0.1?.The digital phase difference detection provides a kind of effective method for MIT system.
5.Postoperative rehabilitation of calcaneus fracture guided by the Footscan system
Zhanfa CHEN ; Lijie MA ; Mingke GUO ; Xicheng LI ; Fengqi ZHANG ; Yingze ZHANG
Chinese Journal of Physical Medicine and Rehabilitation 2009;31(6):405-408
Objective To test the Footscan system for guiding the postoperative rehabilitation of calcaneus fractures.Methods Sixty patients with unilateral calcaneus fracture were divided randomly into a rehabilitation group and a control group.Patients in both groups began a routine of functional rehabilitation training 24 h after a reduction and fixation operation.The patients in the rehabilitation group received individualized rehabilitation protocols based on regular dynamic evaluation of their plantar pressure using the Footscan system.Those in the control group were administered routine rehabilitation training without the personal modifications.At the 2nd and 7th month postoperation,the dynamic plantar pressure of both groups was evaluated and the functioning of their feet Was scored.Results At the 2nd month post-operation,there was no significant difference between the two groups in terms of subtalar ioint range of motion,the lateral deviation of pressure center,the time of heel touch with the ground,the maximum pressure at the lateral aspect of the calcaneus and impulsive force during walking.The functional evaluation scores were also not significantly different.At the 7th month post-operation,all the indices in both groups had improved significantly over the 2nd month,bulthe improvement in the rehabilitation group Was greater(except the time of heel touch with the ground).Conclusion The Footscan system can be a valuable tool for evaluating patients with calcaneus fracture and serve as a reference for planning rehabilitation interventions for such patients.
6.Mechanism of decimeter wave in the prevention of flexor tendon adhesion
Dehu TIAN ; Mingke GUA ; Lixin MI ; Jiuhui HAN ; Jingqi ZHANG ; Zhong ZHANG ; Lianping YANG
Chinese Journal of Tissue Engineering Research 2005;9(6):219-221
BACKGROUND: Tendon injury is a common injury in the department of hand surgery. The postoperative recovery of hand function is always affected by tendon adhesion after tendon repair. To prevent tendon adhesion, especially the adhesion after flexor tendon repair is always the key in the rehabilitation of hand surgery.OBJECTIVE: To investigate the impact of decimeter wave therapy on tendon adhesion and healing after flexor tendon repair.DESIGN: Randomized controlled study based on experimental animal SETTING: Provincial Institute of Orthopaedics.MATERIALS: The study was conducted in Hebei Provincial Institute of Orthopaedics from January 2001 to June 2003. Totally 28 Leghorn chickens were randomly divided into decimeter wave therapy group and operation control group.METHODS: The flexor digitorum profundus tendons of Leghorn chickens were transected and repaired. Decimeter wave therapy was applied to the toes on chickens of decimeter wave therapy group. Animals were executed at week 3 or 6 after operation for macroscopical observation and histological observation under optical and electron microscopes, and biomechanical analysis.MAIN OUTCOME MEASURES: Principle index: results of macroscopical observation and the observatory results under optical and electron microscope, and the results of biomechanics. Secondary index: results of the classification of tendon adhesion and healing.RESULTS: It could be seen under macroscopical and histological observation that the adhesion significantly reduced in decimeter wave therapy group. The protein synthesis of fibroblast was significantly more than that of the control group under electron microscope. As indicated by biomechanical analysis, the tendon gliding distance[ (5.37 ± 1.06) mm at week 3, (6.76 ± 1.52) mm at week 6]and the rehabilitative compliance( 1. 04 ± 0.65 at week 3)of decimeter wave therapy group were bigger than those of the control group respectively [ (4.43 ±1.03) mm, (5.33±1.27)mmand0.63±0.31](P <0.05), and the anti-tension strength of decimeter wave in therapy group (N, 26. 93 ± 4. 80,47. 12 ± 7.76) was significantly bigger than that of the control group respectively(21.29 ±4. 88 and 38.96 ±7.52) (P <0. 01).CONCLUSION: Decimeter wave therapy can effectively promote tendon healing and reduce tendon adhesions and provide prerequisites for early rehabilitative training after flexor tendon repair. Hence, it is an ideal assistance in the prevention of tendon adhesion.
7.Risk factors analysis of ulcerative colitis-associated colorectal cancer
Yanhui GU ; Guangsen HAN ; Shijia ZHANG ; Yuzhou ZHAO ; Jian LI ; Pengfei MA ; Yanghui CAO ; Mingke HUO
Chinese Journal of Digestive Surgery 2017;16(7):736-740
Objective To explore the risk factors of ulcerative colitis-associated colorectal cancer (UC-CRC).Methods The retrospective case-control study was conducted.The clinicopathological data of 536 patients with ulcerative colitis (UC) who were admitted to the Henan Tumor Hospital from March 2004 to June 2015 were collected.Observation indicators:(1) follow-up results:cases with follow-up,follow-up time,cases of UC-CRC,age of onset,pathological type of UC-CRC;(2) risk factors analysis affecting occurrence of UC-CRC:gender,age of onset,course of disease,severity of disease,disease classification,extent of lesion,smoking history,family history of colorectal cancer,anemia,hypoproteinemia,body weight loss,extraintestinal manifestations,colonic polyps,backwash ileitis,atypical hyperplasia,anxiety or depression,treatment method and regular endoscopy reexamination.Follow-up using outpatient examination and telephone interview was performed to detect prognosis of patients up to April 2017.Patients underwent colonoscopy once every 6 months within 3 years after diagnosis and once every 1 year after 3 years.Measurement data with skewed distribution were described as M (range).The univariate analysis was done using the chi-square test and Fisher exact probability.The multivariate analysis was done using the Logistic regression model.Results (1) Follow-up results:of 536 patients,450 were followed up for 26.0-120.0 months,with a median time of 76.4 months.During the follow-up,16 patients were complicated with UC-CRC,including 9 males and 7 females.Age of onset of colorectal cancer was 14-78 years,with an average age of onset of 44 years.Pathological type:high-differentiated right colon adenocarcinoma was detected in 5 patients,high-and moderate-differentiated left colon adenocarcinoma in 3 patients,left colon signetring cell carcinoma in 2 patients,moderate-differentiated rectal tubular adenocarcinoma in 3 patients,highdifferentiated rectal papillary adenocarcinoma in 2 patients and malignant lymphoma in 1 patient.(2) Risk factors analysis affecting occurrence of UC-CRC:the results of univariate analysis showed that course of disease,extent of lesion,colonic polyps and atypical hyperplasia were risk factors affecting occurrence of UC-CRC (x2 =14.848,18.885,10.554,P<0.05).The results of multivariate analysis showed that course of disease > 10 years,lesion involving the whole colon,colonic polyps and atypical hyperplasia were independent risk factors affecting occurrence of UC-CRC (OR=12.893,17.847,7.326,19.742,95% confidence interval:1.726-74.337,1.445-89.793,1.263-43.128,3.625-96.524,P<0.05).Conclusion The course of disease > 10 years,lesion involving the whole colon,atypical hyperplasia and colonic polyps are independent risk factors affecting occurrence of UC-CRC.
8.Early curative repair of urinary fistula caused by iatrogenic injury to ureter, bladder and urethra after resection of rectal cancer
Yuzhou ZHAO ; Guangsen HAN ; Mingke HUO ; Pengfei MA ; Chenyu LIU ; Junli ZHANG ; Jingtao WANG
Chinese Journal of General Surgery 2017;32(5):386-388
Objective To evaluate the result of early repair for urinary fistula caused by iatrogenic injury to ureter,bladder and urethra during resection of rectal cancer.Methods We retrospectively analyzed 26 cases of urinary fistula after resection of rectal cancer patients encountered in Department of General Surgery,Henan Tumor Hospital from October 2005 to May 2016.Urinary fistula was divided into four types according to the site of fistula.Results Surgery was performed ever after the diagnosis of the fistula was identified.In type Ⅰ fistula (6 cases of posterior urethral fistula) the treatment was stent placement and packing of the greater omentum.2 cases of bladder top fistula (type Ⅱ),were treated by fistula repair and cystostomy.Type Ⅲ involved 12 cases (bladder triangle fistula).The treatment was ureter stenting replantation,and cystostomy Type Ⅳ:ureteral fistula in 6 cases,the treatment was end-to-end anastomosis and stenting.After surgery 24 cases were cured and 2 cases (all of type Ⅲ fistula) ended up with permanent bilateral ureterocutaneostomy.Conclusion It is safe and effective to make early remedy repair for ureter,bladder and urethral fistula iatrogenically during rectal cancer resection.
9.Study on the pulsed electromagnetic fields promoting cure of plateau stress ulcer
Mingke JIAO ; Jing FENG ; Lin LOU ; Peng ZHANG ; Xiliang GENG ; Saidazimu YIMITI ; Yanhui SHI
Chinese Medical Equipment Journal 2017;38(5):36-38
Objective To determine the effects of non-thermal biological effect of low frequency pulsed electromagnetic field (LFPEF) with 15 Hz and 30 mT on ulcer wound during the plateau stress ulcer cure.Methods Thirty male Sprague-Dawley rats were assigned to three equal groups:control,normal cure group (NC) and exposure treatment groups (ET).The plateau rats stress ulcer models were constructed with the combination method of a hypoxic and low-pressure acclimation and the stimulation of absolute ethyl alcohol irrigating stomach.The LFPEF equipment generated the LFPEF of 15 Hz,40% duty cycle and 30 mT to expose and treat the rats' stomach of ET group with the frequency of 3 hours each day.After 6 days of exposure treatment,the stress ulcer cure situation of each group was evaluated by the methods of macroscopic observation,the gastric juice pH values detection and ulcer index (UI) measurement.Results After 6 days of model,the macroscopic observation showed that the ulcer of NC group was worse than the that of ET group (P<0.05).The pH values and UI of ET group were significantly different with those of NC group,and closed to those of the control group.Conclusion The nonthermal biological effect of LFPEF could promote the plateau stress ulcer cure.
10.Topical application of sodium hyaluronate for preventing perivascular adhesion of the vein grafts in rabbits: An experimental study
Mingke GUO ; Haijun TIAN ; Chunming HAN ; Jixing ZHU ; Tong BAO ; Di YANG ; Peng YU ; Yafei DUAN ; Fengliang FAN ; Hongguang ZHANG
Medical Journal of Chinese People's Liberation Army 2017;42(8):733-736
Objective To explore the effect of topical application of sodium hyaluronate on preventing perivascular adhesion of the vein grafts in rabbits. Methods Thirty-six male New Zealand white rabbits, aged 5 months, were randomly and equally divided into 2 groups: groups A and B. Arterial defect model was established by cutting about 1cm artery from the middle part of the dissected left common carotid artery. A section about 3cm was cut from the right external jugular vein, and the harvested vein was inverted and anastomosed end-to-end to the artery defect. After the anastomosis, the adventitia and two anastomoses of the grafted veins in group A were coated locally with 0.2ml sodium hyaluronate. The grafted veins were obtained 1, 2 and 4 weeks after the operation, with the perivascular adhesion of the vein grafts being examined macroscopically before the resection. HE staining and Masson staining were preformed for histological changes of grafted vein wall and the perivascular adhesion of the vein grafts. At 2, 4 weeks postoperation, the perivascular adhesions of the vein grafts were graded by the grading criteria of adhesion in macroscopic evaluation and histological evaluation. Result At 1, 2 and 4 weeks postoperatively, the macroscopic and histological observation found that the perivascular adhesions in group A were looser than those in group B. The macroscopic grade and histological grade were lower in group A than in group B, there was a significant difference between the two groups at 2 and 4 weeks postoperation (P<0.05). Conclusion Topical application of sodium hyaluronate can reduce the perivascular adhesion and is an ideal treatment strategy for preventing perivascular adhesion of vein grafts.