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1.
Chinese Journal of Orthopaedics ; (12): 457-465, 2017.
Article in Chinese | WPRIM | ID: wpr-505736

ABSTRACT

Objective To investigate the safety and efficacy of three column osteotomy (3-CO) procedures through previous spinal fusion site for the revision surgical treatment in severe spinal deformity patients.Methods From Oct.2010 to May 2014 in our hospital,a total of 12 severe spinal deformity patients underwent 3-CO for the revision surgical treatment.There were 7 males and 5 females with the average age of (21.8±3.8) years,ranging from 18 to 30 years.The mean time from the initial operation to the revision surgery was (10.2±4.8) years (ranging from 3 to 17 years).The reasons for revision were:curve progression in 7 patients,neurologic deficit in 2 cases,implant failure in 1 patient and pseudarthrosis in 2 patients.The coronal parameters including major Cobb angle and distance between C7 plumb line and center sacral vertical line (C7PL-CSVL),and the sagittal parameters including global kyphosis curve and sagittal vertical axis (SVA) were measured pre-operatively,post-operatively and at last followup,respectively.The operation time,intraoperative blood loss and complications were recorded.The paired t test was used to evaluate the difference among pre-revision,post-revision and last follow-up.Results The average operation time was (451.7±83.1) min (range,320-600 min) and the average blood loss was (4 016.7± 1 080.0) ml (range,2 700-6 000 ml).The average follow-up time after revision operation was (35.4±9.8) months (range,24-49 months).The coronal Cobb angles of pre-revision and post-revision were 83.8°±23.3°and 34.6°± 13.7°.The average correction rate was 60.1% ±8.8%.At last follow-up,the average coronal Cobb angle was 34.9°±13.8°,there was no significant loss of correction.The pre-revision and post-revision values of global kyphosis were 99.1°±13.3°and 38.7°±7.8° with a mean correction rate of 60.8% ±6.7%.At the last follow-up,the average global kyphosis was 39.3°±7.5°and no loss of correction was found.For the C7PL-CSVL and SVA,pre-revision (30.3± 17.1) mm and (40.1±31.1) mm were corrected to (14.3 ±7.6) mm and (19.1± 12.3) mm immediately after revision operation,respectively.At final follow-up,the average C7PL-CSVL and SVA were(14.1 ± 7.6) mm and (19.6± 12.1) mm,the correction was well maintained.Obviously,two patient's neurological status improved from Frankel C before revision surgery to Frankel E.Complications were encountered in five patients (41.7%),including SEP signal changed in 1 patient (8.3%),transient neurologic deficit after revision surgery in 1 patient (8.3%),cerebrospinal fluid leak in 1 patient (8.3%),and pleural effusion in 2 patients (16.7%).During the follow-up time,there was no patient experienced pseudarthrosis,implant failure,infection or significant loss of correction.Conclusion Based on results of this study,it was concluded that 3-CO procedures through previous spinal fusion sites could obtain satisfactory and safety results in severe spinal deformity revision surgery.However,it is a technique-demanding procedure with more blood loss,longer operative time and higher risk of perioperative complications.

2.
Chinese Journal of Surgery ; (12): 179-185, 2017.
Article in Chinese | WPRIM | ID: wpr-808289

ABSTRACT

Objective@#To investigate the causes of 30-day unplanned revision surgery following one-stage posterior vertebral column resection (PVCR) for severe spinal deformity and the methods of prevention and management.@*Methods@#A total of 112 severe deformity patients underwent one-stage PVCR for surgical treatment in the 306th Hospital of People′s Liberation Army from May 2010 to December 2015 were retrospectively reviewed. Six patients required reoperation within 30 days after PVCR, including 2 males and 4 females with average age of 21 years (ranging from 12 to 38 years). Four cases were congenital kyphoscoliosis, 1 was post-laminectomy kyphoscoliosis and 1 was post-tuberculous angular kyphosis. Three cases associated with preoperative neurologic deficit (Frankel C in 1 patient and D in 2 patients). The causes, management and outcomes of unplanned revision surgery within 30 days after PVCR were recorded.@*Results@#The total incidence of unplanned revision surgery within 30 days following PVCR was 5.4% (6/112). There was 1 case due to cerebrospinal fluid leak, 5 cases with varying degrees of new neurologic deficits, the causes were as followed: dural buckling in 1 case, residual bone compression in 1 case, epidural hematoma compression in 2 cases, spinal subdural hematoma in 1 case. All the 6 cases underwent surgical exploration again, including further dural repair, decompression and hematoma clearance. After unplanned reoperation, 6 cases recovered completely. The average follow-up time after surgery was 30.8 months (ranging from 10 to 60 months). The major curve at coronal plane was improved from preoperative 87.7° to 34.2°, with a mean correction of 61.0% at final follow-up; the sagittal kyphosis curve was improved from preoperative 119.5° to 45.5°, with a mean correction of 61.9% at final follow-up. Two patients′ neurological status improved from Frankel D to Frankel E, one patient′s neurological status improved from Frankel C to Frankel E.@*Conclusions@#One-stage PVCR could be an effective method for treatment of severe spinal deformity. The causes of 30-day unplanned reoperation after PVCR are as followed: cerebrospinal fluid leak, dural buckling, residual bone compression and hematoma compression. Timely surgical exploration can gain good clinical outcomes.

3.
Article in Chinese | WPRIM | ID: wpr-492667

ABSTRACT

BACKGROUND:It is generaly believed that the spine wil be extended, and vertebral muscle atrophy, bone loss of vertebral body, increased height and area of intervertebral disc, changes of composition of intervertebral disc wil occur in the condition of weightlessness. These are likely to be the cause of high incidence of low back pain. OBJECTIVE:To observe changes in lumbar spine bone microstructure analysis of simulated weightlessness on rhesus lumbar spine biomechanics. METHODS:Fourteen young rhesus monkeys were randomly divided into two groups: control group (n=7;free activities in the cage during the experiment), and experimental group (n=7; the use of head-down-10° on a special bed by bundle lying to simulate weightlessness). RESULTS AND CONCLUSION:(1) The results of Micro-CT examination: in the experimental group, structure model index in trabecular bone of increased. Trabecular bone changed from plate-like to the rod-like change. The intersection number of bone tissue in unit length to non-bone tissue declined. The average width of the canal between the trabecular bone increased, suggesting that there have been signs of osteoporosis in the experimental group. (2) Under an optical microscope, in the experimental group, bone hyperplasia line was disordered and irregular. Thick endplate trabecularbone became smal, shalow, and arranged substantialy perpendicular to the direction of trabecular bone and cartilage endplate. The closer the endplate surface, the smaler trabecular bone was. Compared with the control group, these smal trabecular bones were thin and curved. Bone marrow cavity was oval. The degree of the connection between the trabecular bones is poor, reflecting the structural characteristics of significant osteoporosis. (3) It is indicated that weightlessness affected the biomechanical properties of rhesus lumbar motion unit.

4.
Article in Chinese | WPRIM | ID: wpr-465646

ABSTRACT

BACKGROUND:During ordinary plate fixation, the soft tissues around the fracture of the proximal humerus are nearly stripped to impact blood supply, and moreover, an ordinary steel plate cannot meet with the fixed requirements for severe osteoporosis, large bone defects and comminuted fractures. OBJECTIVE: To observe the functional recovery and complications in middle-aged patients with proximal humeral fractures undergoing stainless steel locking plate implantation. METHODS:From March 2011 to March 2014, 48 patients with proximal humeral fractures were treated in the 306th RESULTS AND CONCLUSION: The 48 patients were folowed up for 6-17 years, and the mean healing time was (15.3±1.2) weeks. At the last folow-up, the Neer scores were excelent in 12 cases, good in 22 cases, fair in 11 cases and poor in 3 cases, with an excelent-good rate of 71%. After internal fixation, there was one case of Hospital of PLA, including 20 males and 28 females, with an average age of 58 years. Of the 48 cases, there were 9 cases of Neer 2 fractures, 26 cases of Neer 3 fractures, and 13 cases of Neer 4 cases, al of which belonged to closed injuries. Al the patients were subject to locking plate implantation for repair of fractures of the proximal humerus, and evaluated based on Neer scores. soft tissue infection, two cases of traumatic arthritis, and no bone ununion and osteomyelitis. These findings suggest that the stainless steel locking plate implantation for repair of fractures of the proximal humerus can achieve a good anatomic reduction under minimaly invasive conditions and produce a stable rehabilitation environment for the soft tissue around the shoulder joint by internal fixation. Hence, the factures can recover faster with less complications. The stainless steel locking plate implantation can obtain good achievements in the repair of proximal humeral fractures of Neer 2, 3 as wel as Neer 4 in young patients with good bone quality.

5.
Article in Chinese | WPRIM | ID: wpr-465300

ABSTRACT

BACKGROUND:Deep vein thrombosis after total knee arthroplasty has attracted increasing attention in recent years,but how to detect deep vein thrombosis in the early time in clinical practice remains unclear.Whether it is necessary to perform type-B ultrasonic or other invasive examination in lower limbs has become a hot issue.OBJECTIVE:To explore the significance of D-Dimer and fibrin degradation products in the prediction of deep vein thrombosis after total knee arthroplasty.METHODS:56 patients received total knee arthroplasty were colected from Department of Orthopedics,The 306th Hospital of Chinese PLA,between December 2012 and February 2014.The D-Dimer and fibrin degradation products were dynamicaly monitored before operation and at 1,3,5,7,10 days post-operation.Al the patients received type-B ultrasonic examination in double lower limbs at 10 days post-operation,and divided into thrombus group and non-thrombus group.The D-Dimer and fibrin degradation products in the two groups were compared.RESULTS AND CONCLUSION:Deep vein thrombosis was found in 13 cases by ultrasonic-B postoperation,D-Dimer and fibrin degradation products showed no significant difference between the two groups at 1 week after operation (P>0.05),but the difference was significant at 10 days (P<0.01).D-Dimer and fibrin degradation products index should be monitored dynamicaly for at least 10 days after operation,which is helpful for the earlydiagnosis of thrombosis.

6.
Article in Chinese | WPRIM | ID: wpr-456170

ABSTRACT

BACKGROUND:Severe spinal angular kyphosis aggravated spinal cord injury and early degeneration, even caused incomplete paralysis or complete paralysis. Surgical treatment is the only solving approaches and method, but it is difficult, exhibits high risk, and easily affects postoperative complications. OBJECTIVE:To analyze the science and effectiveness of posterior vertebral column resection osteotomy combined with step correction in treatment of stiff angular kyphosis based on biomechanical principle. METHODS:A total of 90 cases underwent posterior vertebral column resection osteotomy combined with bilateral pedicle screw spinal cord gradual y shortening echelon tight closure and orthopedic fixation were selected, including 37 males and 52 females, at the average age of 47 years. Kyphotic angle, spinal sagittal imbalance, trunk side offset rate, operation time, intraoperative blood loss were compared and analyzed before and after treatment. RESULTS AND CONCLUSION:The kyphotic angles were 31°-138° (averagely 90.1°) preoperatively and 10°-90° (averagely 41.6°) postoperatively, with an improvement rate of 65%. The distance from C 7 plumb line to the S 1 upper edge was averagely 5.2 mm, with a correction rate of 73%. Intraoperative blood loss was 1 200-6 000 mL, averagely 2 089 mL. Operation time was 212-470 minutes, averagely 326 minutes. The patients were fol owed up for 20 to 35 months after the surgery. Osteotomy segments had achieved bone fusion in al patients, and no complications of spinal cord injury or orthopedic angle loss appeared. These data verified that in the accordance with cellbiomechanics and spinal biomechanical principles, bilateral pedicle screw spinal cord gradual y shortening echelon tight closure and orthopedic fixation protected utmost spinal cord cells against injury in the correction of thoracolumbar angular kyphosis. There is sufficient basis for cellphysiology and it accorded biomechanical and physiological characteristics. During the surgery, we should pay attention to protection and release of nerve root and avoid postoperative corresponding nerve root irritation. Ful fusion ensures kyphosis correction and avoids spine lateral offset, is an effective safeguard for the recovery of spinal function and postoperative orthopedic effect.

7.
Article in Chinese | WPRIM | ID: wpr-453135

ABSTRACT

BACKGROUND:The treatment difficulties of thoracolumbar angular kyphosis surgery are:low correction rate, hard to rebuild sagittal plane, easily induce neurological complications, postoperative loss of balance, high incidence of pseudarthrosis and postoperative loss of correction degree. OBJECTIVE:To explore the safety and efficacy of modified posterior vertebral column resection osteotomy and bilateral pedicle screw combined with echelon tight closure spinal cord technique and implant fixation for severe spinal angular kyphosis. METHODS:A total of 87 severe spinal angular kyphosis patients, 36 males and 51 females, who were treated in the Department of Orthopedics, the 306 Hospital of Chinese PLA from January 2006 to December 2013, were enrol ed in this study. They underwent posterior vertebral column resection, bilateral pedicle screw combined with echelon tight closure spinal cord, and implant fixation. Kyphosis, spinal sagittal imbalance, offset rate towards trunk side, operation time and intraoperative blood loss were observed before and after treatment. RESULTS AND CONCLUSION:The preoperative average kyphosis was 90.1° (31°-138°). The postoperative average kyphosis was 27.9° (15°-57°). The improvement rate was 76%. The improvement rate of trunk sagittal offset was 76%. Intraoperative blood loss was 800-3 000 mL, and average blood loss was 2 300 mL. The operation time was 5-7 hours, averagely 5.9 hours. Before treatment, two patients affected neurologic symptoms in double lower extremity, and their Frankel classification was grade C and became grade E after treatment. Al patients were fol owed up for 9-57 months. Bony fusion was achieved in al patients. No complications of spinal cord injury appeared, and no orthopedic angle missing occurred. These results indicate that during posterior vertebral column resection for treating severe angular stiffness of the thoracic kyphosis, blood vessels could be maintained greatly. Blood vessel injury-induced ischemic changes in spinal cord and ischemic reperfusion injury could be avoided. To reduce hemorrhage and to keep effective blood volume in patients with low body mass are effective for early recovery after treatment. Bilateral pedicle screw combined with echelon tight closure spinal cord technique greatly protected spinal cord cells against injury. We should pay attention to the protection and loose of nerve root to avoid postoperative nerve root irritation. Sufficient bone fusion ensures kyphosis correction, avoids spine lateral offset, and plays a key role in spinal function and postoperative orthopedic effect.

8.
Article in Chinese | WPRIM | ID: wpr-441740

ABSTRACT

BACKGROUND:Clinical treatment of hemivertebrae-induced congenital scoliosis is a complex medical problem. OBJECTIVE:To find the optimal treatment for hemivertebrae accompanied by congenital scoliosis. METHODS:Total y 142 hemivertebrae patients who had received surgical treatment in the Department of Orthopedics, the 306 Hospital of Chinese PLA, China from 2010 to 2012 were enrol ed. The main surgical treatment was hemivertebrae resection and bone fusion with internal fixation, apical osteotomy for severe scoliosis and spinal shortening with internal fixation, one-stage posterior thoracolumbar osteotomy with internal fixation, spinal decompression with internal fixation. RESULTS AND CONCLUSION:After treatment, the average correction rate was 70.9%for scoliosis and 71.7%for kyphosis. The fol ow-up period was 14-35 months, with an average of 23.4 months. By the end of the final fol ow-up, the loss rate for Cobb’s angle was 7.3%for scoliosis and 7.7%for kyphosis. Fol ow-up X-ray films showed bone fusion and internal fixation without loosening, fracture, and decompensation. Implementation of one-stage posterior thoracolumbar osteotomy with internal fixation can effectively correct hemivertebrae-induced kyphoscoliosis to obtain a satisfactory spinal sagittal and coronal balance.

9.
Article in Chinese | WPRIM | ID: wpr-439754

ABSTRACT

BACKGROUND:Orthopedic osteotomy at the apex of kyphosis is best for treatment of ankylosing spondylitis from a biomechanical aspect, but there is a high risk for intraoperative spinal cord injury. OBJECTIVE:To explore the clinical efficacy of vertebral plate osteotomy+vertebra osteotomy+long-segment pedicle screw fixation in the treatment of ankylosing spondylitis with kyphotic deformity. METHODS:Thirty-six patients with ankylosing spondylitis were subjected to pedicle subtraction osteotomy and Smith-Peterson osteotomy, and then fol owed up for 3 months to 2 years. RESULTS AND CONCLUSION:After implantation, sagittal imbalance did not occur in 36 patients, and the improvement rate of sagittal imbalance was 64%. The improvement rates of thoracolumbar kyphosis and chin-brow vertical angle were 60%and 98%, respectively. The pain relief rate was 64%, and the Oswestry Disability Index was 95%. There were no pul ed nails, broken nails and broken robs after implantation. These findings indicate that the combination of selective osteotomy technique and long-segment internal fixation can achieve stable fixation effects, prevent sagittal imbalance, and avoid the occurrence of pul ing nails, breaking nails and breaking robs caused by osteoporosis.

10.
Article in Chinese | WPRIM | ID: wpr-438186

ABSTRACT

BACKGROUND:Knee society score of Peking Union Medical Col ege has been promoted and used in the 306th Hospital of PLA for 2 years and we have accumulated some clinical data. OBJECTIVE:To analyze the stability and feasibility for suitable clinical medical practice of knee society score of Peking Union Medical Col ege. METHODS:Fifty-five patients with osteoarthritis of the knee were included, and the patients were divided into three groups:the preoperative group;3 months postoperative fol ow-up group;6 months postoperative fol ow-up group. The measurement results obtained by the application of the scale were compared to those of the Western Ontario and McMaster Universityies Ostroarthritis Index, visual analog scale, and hospital for special surgery score, and then knee society score goodness-of-fit analysis was performed based on the structural equation model. RESULTS AND CONCLUSION:Knee society score performance assessment of the signs and symptoms of osteoarthritis of the knee patients was positively correlated with the pain severity of visual analog scale score;the overal knee society score of the patients after 6-month fol ow-up was significantly improved compared with that before treatment. The knee society score after 3-and 6-month fol ow-up was significantly higher than that before treatment, and the score was quite with the hospital for special surgery score. The overal assessment of the knee society score after treated for 3 and 6 months was improved for more than grade Ⅰ, the visual analog scale score was decreased for more than 30%. The pain assessment items and physiological functional assessment items of Western Ontario and McMaster Universityies Ostroarthritis Index after 6-month fol ow-up were significantly better than those before treatment (Pgoodness-of-fit analysis showed that the scale had good goodness which had scientific nature and application value.

11.
Article in Chinese | WPRIM | ID: wpr-435547

ABSTRACT

BACKGROUND:The correct method selected according to the specific type and characteristics of lumbar disc herniation can achieve satisfactory effect, but in clinic, there stil some patients have recurrence symptoms after treatment. OBJECTIVE:To investigate the recurrence factors of spinal implant internal fixation for the treatment of lumbar disc herniation, as wel as the intervention measures. METHODS:Fifty-two patients with recurrence symptoms of lumbar disc herniation after internal fixation from January 2002 to December 2007 in the Department of Orthopedics, the 306th Hospital of PLA were retrospectively analyzed, including 28 male cases and 24 female cases, the average age was 43.2 years, ranged from 25-52 years. The time form first internal fixation to the recurrence was 3-192 months, average 38 months. The patients had the symptoms of lumbar and bilateral/unilateral leg pain and numbness. Al the patients underwent the anteroposterior radiographs of lumbar spine and the hyperextension and flexion lateral X-ray films to evaluate the stability of the lumbar spine. Lumbar magnetic resonance imaging was used to observe the intervertebral disc situation of the segment treated with lumbar internal fixation as wel as the spinal stenosis and disc degeneration. RESUTLS AND CONCLUSION:Among the 52 patients, 22 cases had recurrence lumbar disc herniation on the same segment after first internal fixation;four cases had recurrence symptoms caused by the spondylodiscitis after implant internal fixation;five cases had scar adhesions caused nerve compression on the site treated with internal fixation;10 cases had the symptoms of lateral recess and nerve root canal stenosis on the site treated with internal fixation;11 cases had recurrence symptoms caused by lumbar instability after internal fixation. It has reality clinical significance to analyze the reasons of recurrence of lumbar disc herniation after internal fixation

12.
Article in Chinese | WPRIM | ID: wpr-591979

ABSTRACT

One patient with the pedicle screw threatening the aorta was treated with adjusting the position of pedicle screw by anterolateral approach. No nervous lesion was found after adjusting. Radiograph showed the position and length of screw at T11 left pedicle of vertebral arch were good. No adverse reaction was detected after 2-years of follow-up.

13.
Article in Chinese | WPRIM | ID: wpr-546580

ABSTRACT

[Objective]To explore the clinical outcome of anterior cervical decompression for severe cervical spondylotic myelopathy with ossification of posterior longitudinal ligament. [Method]Thirty-three patients with severe cervical spondylotic myelopathy and continuous OPLL underwent posterior longitude ligament resection and floating in anterior cervical decompression.The intervertabral space were stabilized by autoilum graft or titanium cage and fixed with windows plates. [Result]All patients were followed up for 8 to 45 months,mean 22 months.Preoperative JOA scores were 6.7,and the postoperative JOA scores were 10.1 and 10.7(evaluated in 3 months and 12 months after surgery),the mean amelioration rate was 72.7% and 78.8%.Of these 33 patients,no severe complications such as cord or vertebral artery injury occurred. [Conclusion]Posterior longitude ligament resection and floating in anterior cervical decompression is a safe and effective treatment for severe cervical spondylotic myelopathy with ossification of posterior longitudinal ligament.

14.
Article in Chinese | WPRIM | ID: wpr-541880

ABSTRACT

Objective To investigate the effect of intraspinal grafting of brain derived neurotrophic factor (BDNF) ex vivo transgene myoblasts cells and methylprednisolone on caspase-3 expression after spinal cord injury (SCI). Methods A total of 120 experimental rats were divided into Group A (spinal cord contusion injury group), Group B (grafting of BDNF ex vivo transgene myoblasts cells group), Group C (methylprednisolone intravenous injection group) and Group D (grafting of BDNF ex vivo transgene myoblasts cells and methylprednisolone intravenous injection group). At days 1, 3, 7, 14 and 28 respectively after SCI, the expression of caspase-3 was measured immunohistochemically for quantitative analysis via a computer image analysis system. The motion functional recovery of the rats was observed by praxiologic and electrophysiologic examination. Results Positive expression cells of caspase-3 were found in all groups, with number from the highest to the lowest in order of Group A, Group B, Group C and Group D (P

15.
Article in Chinese | WPRIM | ID: wpr-538009

ABSTRACT

Objective To investigate the results of transpedicular balloon kyphoplasty for treatement of aged osteoporotic spinal compressive fractures. Methods Ten cases of aged osteoporotic spinal compressive fractures (range 57 to 72 years old), with T11 1 case, T12 4 cases, L1 5 cases were treated with kyphoplasties under “C” armed imaging guiding. The inflatable bone tamp was inserted into the fractured vertebral body transpedicularly in a minimally invasive way. The balloon was inflated, elevating the endplate and restoring vertebral body height and then confirmed by “C” armed imaging. The balloon was deflated and withdrawn, leaving a cavity within the vertebral body. The cavity was then filled with bone cement or other preferred material, creating an “internal cast” which was also confirmed by “C” armed imaging. Results The back pain disappeared immediately after the kyphoplasty in all of 10 cases. In the same day or following day after the procedure, the patients were allowed to get off bed. The height restoration of vertebral body and correction of kyphosis were confirmed by X-ray after the procedure. The average correction of kyphosis was 16?. At the time of the last follow up, all 10 cases retained the life style as before injury, there was no back pain, and deformity correction was maintained well. No complications occurred. Conclusion Kyphoplasty is a safe and effective way to treat aged osteoporotic spinal compressive fractures.

16.
Article in Chinese | WPRIM | ID: wpr-566368

ABSTRACT

Objective To detect the genetic toxicity of a neotype in situ polymeric injectable artificial prosthetic nucleus pulposus.Methods The artificial prosthetic nucleus pulposus was soaked for preparing the leaching liquor which was used for tests of genetic toxicity.Salmonella typhimurium reverse mutation test(Ames Test),mammalian cell chromosome aberration(CA) test utilizing Chinese hamster ovary cells(CHO),and mouse micronucleus(MN) test were performed to detect the genetic toxicity of the extraction,including the effects on DNA,chromosome aberration and genetic mutation.Results The number of reverse mutation strains,from five strains of every dosage group,was all lower than half of quantum of control group,with or without the addition of S9,in the Ames Test,which assessed as negative.In CA test,no significant difference of chromosome aberration rate existed among the high,medium and low concentration group,while the CA rate of all the three groups was lower than that of the negative group(P0.05),but significantly lower than that of the positive control group(P

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