Aim: Assessment of curve flexibility is important in decision making before surgical correction of scoliosis. Supine bending radiographs are presently the gold standard technique by which flexibility is assessed, but their reliability has been questioned. Our aim was to compare the usefulness of supine side bending and traction radiographs (with new electronic traction table) in assessing curve flexibility, examining the correlation of each technique with postoperative correction, determining fusion levels in patients undergoing posterior spinal fusion. Material and Method: 25 patients required surgical treatment with idiopathic scoliosis were evaluated prospectively. Thirteen were female. The average age was 12.87 years. Preoperative radiologic evaluation consisted of standing anteroposterior, lateral, supine lateral bending and traction graphs by electronic traction table. We designed a new electronic traction table in order to take the longitudinal traction and three-points lateral pressure radiographs. We situated the patient on the table and measured the patient’s weight. Then we made a longitudinal and lateral traction while asking the possible neurologic symptoms. If there was not any symptom we stopped at the seventy percent of the patient’s weight for the longitudinal and at the fifty percent for the lateral pressure. These radiographs had been taken before and under general anesthesia (UGA). The correction obtained in the Cobb angle between the bending and traction radiographs was compared. The influence of the traction radiography on the decision for surgery and its correlation with postoperative result was examined. Results: Longitudinal traction radiographs taken consciously provided the best amount of flexibility, with no significant difference from traction with the patient UGA (p = 0.17) but with significant difference from bending radiographs (p < 0.002). Better flexibility in traction radiographs helped us eliminate the need for anterior release in 5 patients. We decreased the fusion levels proximally or distally after all in 12 patients. No significant difference was demonstrated between the traction radiography and postoperative correction (P = 0.14). Conclusion: Flexibility obtained at traction radiographs with the patient conscious and UGA is clearly better in numerical values, and closer to the amount of surgical correction than the amount of flexibility at three-points lateral pressure radiographs and side-bending radiographs. This method benefits patients by allowing them to avoid anterior release surgery, assessing the fusion levels and helps predict postoperative correction. Longer follow ups are needed to see whether there is decompensation or not

Aims. To determine the effectiveness of prone traction radiographs in predicting postoperative slip distance, slip angle, changes in disc height, and lordosis after surgery for degenerative spondylolisthesis of the lumbar spine. Methods. A total of 63 consecutive patients with a degenerative spondylolisthesis and preoperative prone traction radiographs obtained since 2010 were studied. Slip distance, slip angle, disc height, segmental lordosis, and global lordosis (L1 to S1) were measured on preoperative lateral standing radiographs, flexion-extension lateral radiographs, prone traction lateral radiographs, and postoperative lateral standing radiographs. Patients were divided into two groups: posterolateral fusion or posterolateral fusion with interbody fusion. Results. The mean changes in segmental lordosis and global lordosis were 7.1° (SD 6.7°) and 2.9° (SD 9.9°) respectively for the interbody fusion group, and 0.8° (SD 5.1°) and -0.4° (SD 10.1°) respectively for the posterolateral fusion-only group. Segmental lordosis (ρ = 0.794, p < 0.001) corrected by interbody fusion correlated best with prone traction radiographs. Global lumbar lordosis (ρ = 0.788, p < 0.001) correlated best with the interbody fusion group and preoperative lateral standing radiographs. The least difference in slip distance (-0.3 mm (SD 1.7 mm), p < 0.001), slip angle (0.9° (SD 5.2°), p < 0.001), and disc height (0.02 mm (SD 2.4 mm), p < 0.001) was seen between prone traction and postoperative radiographs. Regression analyses suggested that prone traction parameters best predicted correction of slip distance (Corrected Akaike’s Information Criterion (AICc) = 37.336) and disc height (AICc = 58.096), while correction of slip angle (AICc = 26.453) was best predicted by extension radiographs. Receiver operating characteristic (ROC) cut-off showed, with 68.3% sensitivity and 64.5% specificity, that to achieve a 3.0° increase in segmental lordotic angle, patients with a prone traction disc height of 8.5 mm needed an interbody fusion. Conclusion. Prone traction radiographs best predict the slip distance and disc height correction achieved by interbody fusion for lumbar degenerative spondylolisthesis. To achieve this maximum correction, interbody fusion should be undertaken if a disc height of more than 8.5 mm is attained on preoperative prone traction radiographs. Level of Evidence: Level II Prognostic Study. Cite this article: Bone Joint J 2020;102-B(8):1062–1071

Purpose: The purpose of this study is to investigate the relationships of traction force, traction time, and hip distraction to the development of nerve conduction abnormalities during hip arthroscopy. Method: Thirteen patients with hip pathology underwent hip arthroscopy. Traction forces applied to the operative leg were measured using a load-cell force transducer. Distraction of the hip joint was assessed using fluoroscopy. Nerve conduction studies of the tibial nerve was performed measuring the latency of the Hoffmann reflex (Hlat reflex). Measurements of the traction force, distraction of the hip, and nerve conduction studies were performed at routine intervals during the procedure, and compared to pre- and post-op values. Results: Nerve Conduction Studies- The mean baseline Hlat reflex was 30.4+/−2.2 milliseconds for all patients. Three patients lost the Hlat reflex immediately (t=0), and an additional three patients lost the Hlat reflex during the procedure (t=30, t=30, t=60). The remaining seven patients all had delayed conduction of the Hlat reflex over time. At one-hour post-op, the Hlat reflex was documented in all patients (mean 31.9+/−2.9 ms) and remained significantly different from baseline (p< 0.01). Clinically, one patient in the lost Hlat reflex group had an associated neuropraxia post-operatively. Traction Forces- The mean initial traction force at time of application for all patients was 97+/−28 lbs. The mean initial traction force of the lost Hlat reflex group and retained Hlat reflex group was 104+/−32.6 lbs and 91+/−24.1 lbs, respectively (p=0.44). Hip Distraction- The mean initial hip distraction at time of application of traction for all patients was 8.8+/−2 mm. The mean initial distraction of the lost Hlat reflex group and retained Hlat reflex group was 9.6+/−1.4 mm and 8+/−2.2 mm, respectively (p=0.15). Conclusion: Traction during hip arthroscopy is associated with significant nerve conduction abnormalities in the immediate post-operative period. Six of thirteen patients had complete loss of the Hlat reflex of the tibial nerve, one of these patients exhibiting clinical neuropraxia. Although length of time in traction may be a factor for the development of nerve conduction abnormalities, a more significant factor may be the change in length over time of the surrounding peripheral nerves

Aims. Although atlantoaxial rotatory fixation (AARF) is a common cause of torticollis in children, the diagnosis may be delayed. The condition is characterised by a lack of rotation at the atlantoaxial joint which becomes fixed in a rotated and subluxed position. The management of children with a delayed presentation of this condition is controversial. This is a retrospective study of a group of such children. Patients and Methods. Children who were admitted to two institutions between 1988 and 2014 with a diagnosis of AARF were included. We identified 12 children (four boys, eight girls), with a mean age of 7.3 years (1.5 to 13.4), in whom the duration of symptoms on presentation was at least four weeks (four to 39). All were treated with halo traction followed by a period of cervical immobilisation in a halo vest or a Minerva jacket. We describe a simple modification to the halo traction that allows the child to move their head whilst maintaining traction. The mean follow-up was 59.6 weeks (24 to 156). Results. Despite the delay in referral, the subluxation was successfully reduced in all children. Only two children required atlantoaxial fusion. Conclusion. The results of our study suggest that normal anatomy with restoration of movement may be achieved even in cases of AARF presenting late, obviating the need for fusion. We also show a simple modification to the halo traction that allows the child to move their head about while still maintaining traction. Take home message: Prompt diagnosis and management with halo traction (with a simple modification as described) is associated with good results in patients with AARF who present late. Cite this article: Bone Joint J 2016;98-B:715–20

Magnetic resonance imaging (MRI) is the gold standard for the diagnosis of the pathologies affecting the glenohumeral joint and the rotator cuff diseases. MRI allows to highlight anatomic discontinuities of both muscles and tendons. However, MRI diagnostic accuracy has not proven to be highly sensitive in distinguishing between a partial-thickness tear and a full-thickness rotator cuff tear. The purpose of this study was to determine if MRI under axial traction can be helpful in increasing MRI sensitivity to identify partial-thickness rotator cuff tears. The study included 10 patients (4 males and 6 females) who had clinical examination and MRI suggesting a partial-thickness rotator cuff tear. They were candidates for shoulder arthroscopy because of persistent symptoms after at least three months of conservative treatment. The patients underwent a new MRI (under axial traction: MRI-AT) with a 4-kg weight applied to the affected arm. Then the patients underwent arthroscopy to confirm the diagnosis. Patients with a suspected full-thickness rotator cuff tear were excluded from the study. Patients’ average age was 52.4 years, and the dominant side was affected in 77.7% of the cases. Preoperative Constant-Murley Score was 57. MRI-AT showed that 3 patients were affected by a complete tear of the rotator cuff, 3 patients by a partial-thickness rotator cuff tear and 4 patients had no lesion. The analysis of data showed that: under axial traction the subacromial space increased by 0,2 mm (P value = 0,001075), the superior glenohumeral space decreased by 2.4 mm (P value = 0,07414), the inferior glenohumeral space increased by 0.3 mm (P value = 0,02942), the acromial angle decreased by 1.9° (P value = 0,0002104) and the acromion-glenohumeral angle decreased by 0.3° (P-value = 0,01974). Two experienced evaluators analyzed previous standard MRI and MRI-AT scans in a double-blinded fashion, with inter-rater evaluation of all the images and measures. Intraclass correlation coefficient (ICC) has been utilized to assess the reliability of the measures performed by different operators. ICC always resulted in more than 0.7, showing a high concordance among values in the same group. A comparative evaluation between standard MRI and MRI-AT has been conducted to highlight possible discrepancies and this has been compared to intraoperative findings. Concordance of the values was 89% between standard MRI and MRI-AT and 100% between MRI under axial traction and intraoperative findings. This study showed a high correlation between the diagnosis achieved with MRI-AT and the intraoperative arthroscopic findings. The use of MRI-AT in clinical practice may improve the diagnostic sensitivity of this method to detect a partial-thickness rotator cuff tear

Introduction and Objective. Low back pain (LBP) is a major cause of long-term disability in adults worldwide and it is frequently attributed to intervertebral disc (IVD) degeneration. So far, no consensus has been reached regarding appropriate treatment and LBP management outcomes remain disappointing. Spine unloading or traction protocols are common non-surgical approaches to treat LBP. These treatments are widely used and result in pain relief, decreased disability or reduced need for surgery. However, the underlying mechanisms -namely, the IVD unloading mechanobiology- have not yet been studied. The aim of this first study was to assess the feasibility of IVD unloading in a large animal organ culture set-up and evaluate its impact on mechanobiology. Materials and Methods. Bovine tail discs (diameter 16.1 mm ± 1.2 mm), including the endplates, were isolated and prepared for culture. Beside the day0 sample that was processed directly, three other discs were cultured for 3 days and processed on day4. One disc was loaded in the bioreactor according to a previously established physiological (compressive) loading protocol (2h/day, 0.2Hz). The two other discs were embedded in biocompatible resin, leaving the cartilage endplate free to permit nutrient diffusion, and fitted in the traction holder; one of these discs was kept in free swelling conditions, whereas the second was submitted to cyclic traction loading (2h/day, 0.2Hz) corresponding to 30% of the animal body weight corrected for organ culture. Results. The cell viability assessed on lactate dehydrogenase and ethidium homodimer stained histological slides was not different between the three cultured discs. This means that the disc viability was not affected neither by the embedding, nor by the traction itself. Compared to the physiologically loaded disc, the gene expression of COL1, COL2 and ACAN was higher in the nucleus pulposus and inner annulus fibrosus of the traction treated disc. In the outer annulus fibrosus of this disc TAGLN and MKX were higher expressed upon traction than in the physiologically loaded disc. Conclusions. Based on these preliminary data, we can conclude that large animal organ culture allows effective unloading of the disc, while preserving cell viability and modulating cellular gene expression responses. This sets the ground for future experiments and opens the door to an evidence-based improvement of clinical spine traction protocols and LBP management overall

The Poole Traction Splint (PTS) is a non-invasive technique that applies dynamic traction to the affected digit using materials readily available in the outpatient department. The primary aim of this study was to document the outcome of the PTS for hand phalangeal fractures. Over a four-year period (2017–2021), suitable patients were reviewed and referred for PTS to the hand physiotherapists. Functional outcome measures included range of motion (ROM), return to work, and a DASH score. In addition, a healthcare cost analysis was carried out. A total of 63 patients were treated with a PTS from 2017 to 2021. Data was analysed for 54 patients with 55 digits. The mean age was 43 years (17–72) and 53.7% (n=29) were female. There were 43 fractures involving the proximal phalanx and 12 involving the middle phalanx. The mean final composite range of movement averaged 209˚ (110–270°), classified as ‘good/excellent’ by ASSH criteria. The mean DASH score was 13.6 (0-43.2; n=45). All patients were able to return to work. Only two (3.7%) digits required conversion to surgical fixation. The PTS resulted in approximate savings of £2,452 per patient. The PTS is a cost-effective non-invasive low risk outpatient treatment method which provides a functional ROM and good functional outcomes in the treatment of complex phalangeal hand fractures, with minimal risk of surgical intervention being required

Introduction and Objective. The treatment of severe deformities often requiring aggressive techniques such as vertebral resection and osteotomies with high comorbidity. To mitigate this risk, several methods have been used to achieve a partial reduction of stiff curves. The objective of this study was to evaluate and quantify the effectiveness of the Perioperative Halo-Gravity Traction (HGT) in the Treatment of Severe Spinal Deformity in Children. Materials and Methods. A historical cohort of consecutive childs with severe spinal deformity who underwent to a perioperative HGT as a part of the treatment protocol. Minimum follow-up of 2 years. Demographic, clinical and radiological data, including time duration of perioperative HGT and Cobb angle in the coronal and sagittal plane. The radiological variables were measured before the placement of the halo, after placement of the halo, at the end of the period of traction, after surgery and in the final follow-up. Results. Seventeen males (57%) and twenty females (43%) were included in the final analysis. The mean age was 6.5 years (SD 4.8). The most frequent etiology for the spinal deformity was syndromic (13 patients). The average preoperative Cobb angle was 88º (range, 12–135). HGT was used in 17 cases prior to a primary surgery and in 20 cases prior to a revision surgery. After the HGT, an average correction of 34% of the deformity was achieved (p <0.05). After the surgery this correction improved. At 2-year follow-up there was a correction loss of 20% (p <0.05). There were 3 complications (8.1%): 2 pin infections and cervical subluxation. Conclusions. The application of HGT in cases of severe rigid deformity is useful allowing a correction of the preoperative deformity of 34%, facilitating surgery. Preoperative HGT seems to be a safe and effective intervention in pediatric patients with high degree deformity

Purpose: To determine whether skull-femoral traction is a predictor of final surgical correction in scoliosis surgery and obviates the need for anterior release in severe deformities. Methods: 20 patients underwent skeletal femoral traction with a maximum of 50% of their body weight with the use of supracondylar femoral pins. A unilateral pin was used in the presence of pelvic obliquity and bilateral pins in patients with a neutral pelvis. Counter traction was applied through Gardner Well tongs at approximately one third the weight. Pre-op radiographs were compared with dynamic films, intra-op traction films and immediate and final post-operative films. Complications related to traction were recorded. All patients underwent posterior alone surgery for their scoliosis corrections. Results: The mean curve magnitude was 80.3 degrees. NO anterior releases were performed. Intra-operative traction provided a mean correction of 60%. Final surgical correction was 70%. Level pelvis was achieved in all patients with pelvic obliquity. Traction provided up to 80% of the final correction in older adult scoliotics (> 50 yo) thus minimizing the force required on the pedicle screws to achieve correction. No traction related complications occurred. Conclusions: Intra-op skull-femoral traction aides in the correction of severe scoliotic curves. Excellent corrections were achieved without the need for anterior releases. Traction reduced pelvic obliquity in the neuromuscular patients. Reducing the magnitude of the curves facilitated exposure of the posterior spine and minimized forces applied to the pedicle screws during scoliosis correction

Background. Proximal phalangeal fractures are caused by an injury to the dorsum of the hand. This usually causes volar angulation which is unstable when reduced. K-wiring or external fixation can damage the soft tissue envelope, can introduce infection and can loosen or displace. Traction splinting is not well described for these fractures. Objectives. Functional and radiographic assessment of all patients with proximal phalangeal fractures treated with traction splinting. Methods. Theatre records were examined for relevant injuries over a 2 year period. These patients were then assessed using a QuickDASH score, a questionnaire specific to traction splinting and with pre-op, intra-op, post-op and follow-up radiographs. Results. A total of 7 patients were treated with traction splinting, all by the senior author (FJS). Clinical follow was 16 months (range12-20). QuickDASH scores were 0, 0, 0, 0, 0, 2.5, 25/100. With regard to work (n=6), all patients but one scored 0/100 for disability with one patient describing mild work related difficulties. Those participating in sports/performing arts (n=6) scored 0/100. There were no finger-tip pain or numbness issues. Finger length perception was satisfactory in all patients. The splint slipped in 3 patients, secondary to horse riding, showering and through scratching. Two patients reported having a measurable loss of motion in the affected digit (follow-up 18 and 20 months), both with mild functional deficit. Radiographic outcomes showed that traction achieved acceptable length restoration, with no angular deformities. Finger length was maintained in all but one patient who had a shortening of 3.2mm. Conclusions. Traction splinting is a non-invasive, safe and inexpensive method of treating proximal phalangeal fractures. Results of our follow-up study show excellent functional and radiographic outcomes with minimal long term morbidity for this treatment option

Objectives. Femoral shaft fracture treatment often results in mal-alignment and the high dosage of radiation exposure. The objective of this study is to develop a Parallel Manipulator Robot (PMR) on traction table to overcome these difficulties so as achieve better alignment for the fractured femur and reduce radiation to both patients and physicians. Methods. The distal platform of PMR is attached to the central pole on standard traction table by the boot adaptor. A leg model with soft tissue made by Pacific Research Laboratory, Inc. is flexed at the knee with patella on the top. A 2/3 circular ring, with 1/3 open circle down, fixed to the fractured distal femur with one trans-wire and one self-tapping screw, acting as adaptable stirrup fixing scheme. To secure proximal femur, an adapter is assembled on the traction table and fixed on the proximal femur. The distal femur is fixed to the 2/3 circular ring platform of PMR. Surgical planning is performed by first acquiring the bi-planar images from the C-Arm X-ray machine. After simulated fracture on 3-D femoral model is made, proximal and distal segments of the model will be superimposed with background bi-planar images. Finally the pre-fractured length and mechanical axis of 3-D femoral model will be restored. Afterwards, a table of schedule for length adjustments of six struts of PMR is generated. This length adjustment schedule is used to drive the PMR for fractured femur alignment and reduction. When reduction completed, a special designed device is used to fix the reduced femur. Then the PMR is removed from the traction table and the patient can be removed from the traction table. Results. Eight femoral sawbones model were artificially broken into eight different fracture patterns. All the fracture patterns have characteristics of distal segments overlapping with proximal segments but in the different locations. The operations of reduction were all following the initial tractions. The results showed that the mean errors were 1.31+-0.45mm for axial discrepancies, 2.43+-0.49mm for lateral translations, 2.26+-0.23mm for angulations. Conclusion. Femoral Shaft Fracture Reduction with PMR on traction table has been built with femoral soft tissue model. The experiments had been made on artificially broken femoral sawbone models. The experiments had been proven that such approach is accurate enough for femoral shaft reduction. Further experiments are necessary in order for it to be used clinically

Objective. Femoral shaft fracture treatment often results in mal-alignment and the high dosage of radiation exposure. The objective of this study is to develop a Parallel Manipulator Robot (PMR) on traction table to overcome these difficulties so as achieve better alignment for the fractured femur and reduce radiation to both patients and physicians. Method. The distal platform of PMR is attached to the central pole on standard traction table by the boot adaptor. A leg model with soft tissue made by Pacific Research Laboratory, Inc. is flexed at the knee with patella on the top. A 2/3 circular ring, with 1/3 open circle down, fixed to the fractured distal femur with one trans-wire and one self-tapping screw, acting as adaptable stirrup fixing scheme. To secure proximal femur, an adapter is assembled on the traction table and fixed on the proximal femur. The distal femur is fixed to the 2/3 circular ring platform of PMR. Surgical planning is performed by first acquiring the bi-planar images from the C-Arm X-ray machine. After simulated fracture on 3-D femoral model is made, proximal and distal segments of the model will be superimposed with background bi-planar images. Finally the pre-fractured length and mechanical axis of 3-D femoral model will be restored. Afterwards, a table of schedule for length adjustments of six struts of PMR is generated. This length adjustment schedule is used to drive the PMR for fractured femur alignment and reduction. When reduction completed, a special designed device is used to fix the reduced femur. Then the PMR is removed from the traction table and the patient can be removed from the traction table. Results. Eight femoral sawbones model were artificially broken into eight different fracture patterns. All the fracture patterns have characteristics of distal segments overlapping with proximal segments but in the different locations. The operations of reduction were all following the initial tractions. The results showed that the mean errors were 1.31+−0.45mm for axial discrepancies, 2.43+−0.49mm for lateral translations, 2.26+−0.23mm for angulations. Conclusion. Femoral Shaft Fracture Reduction with PMR on traction table has been built with femoral soft tissue model. The experiments had been made on artificially broken femoral sawbone models. The experiments had been proven that such approach is accurate enough for femoral shaft reduction. Further experiments are necessary in order for it to be used clinically

We present the case of a 15-year-old boy with symptoms due to Klippel–Feil syndrome. Radiographs and CT scans demonstrated basilar impression, occipitalisation of C1 and fusion of C2/C3. MRI showed ventral compression of the medullocervical junction. Skull traction was undertaken pre-operatively to determine whether the basilar impression could be safely reduced. During traction, the C3/C4 junction migrated 12 mm caudally and spasticity resolved. Peri-operative skull-femoral traction enabled posterior occipitocervical fixation without decompression. Following surgery, cervical alignment was restored and spasticity remained absent. One year after surgery he was not limited in his activities. The surgical strategy for patients with basilar impression and congenital anomalies remains controversial. The anterior approach with decompression is often recommended for patients with ventral compression of the medullocervical region, but such procedures are technically demanding and carry a significant risk of complications. Our surgical strategy was an alternative solution. Prior to a posterior cervical fixation, without decompression, skull traction was used to confirm that the deformity was reducible and effective in resolving associated myelopathy

Aim: Supine lateral bending radiographs are the standard methods of evaluating curve flexibility before surgery in idiopathic scoliosis. Supine traction radiographs have also been used at the authors’ institution in addition to the supine lateral bending radiographs before surgery, believing that it is usually more helpful to analyze the response of the main and compensatory curves to corrective forces. The purpose of this prospective study was to use and evaluate the results of traction radiographs taken before general anesthesia (BGA) and under general anesthesia (UGA). Material and Method: 25 patients required surgical treatment with idiopathic scoliosis were evaluated prospectively. Thirteen were female. The average age was 12.87 years. We designed a new electronic traction table in order to take the longitudinal traction and three-points lateral pressure radiographs. We situated the patient on the table and measured the patient’s weight. Then we made a longitudinal and lateral traction while asking the possible neurologic symptoms. If there was not any symptom we stopped at the seventy percent of the patient’s weight for the longitudinal and at the fifty percent for the lateral pressure. These radiographs had been taken before and under general anesthesia (UGA). The influence of the traction radiographies on the decision for surgery and its correlation with postoperative result was examined. Results: Longitudinal traction radiographs taken consciously provided the best amount of flexibility, with no significant difference from traction with the patient UGA (p = 0.17) but with significant difference from bending radiographs (p < 0.002). No significant difference was demonstrated between the traction radiographies taken before and under general anesthesia and postoperative correction (P = 0.14). Conclusion: The curve flexibility in supine traction films taken with the patient BGA was nearly equal to the curve flexibility in supine traction films taken with the patient UGA in all patients and all types of curves. Thus, there is no need to obtain a normal supine traction film for flexibility analysis under general anesthesia. By this way; the surgeons will be able to give the patient a definitive plan before surgery because the decision can be finalized after seeing the traction radiographs with the patient before the general anesthesia and operation time will be shorter

Between January 1995 and December 2000, 112 children with a closed displaced supracondylar fracture of the humerus without vascular deficit, were managed by elevated, straight-arm traction for a mean of 22 days. The final outcome was assessed using clinical (flexion-extension arc, carrying angle and residual rotational deformity) and radiographic (metaphyseal-diaphyseal angle and humerocapitellar angle) criteria. Excellent results were achieved in 71 (63%) patients, 33 (29%) had good results, 5 (4.4%) fair, and 3 (2.6%) poor. All patients with fair or poor outcomes were older than ten years of age. Elevated, straight-arm traction is safe and effective in children younger than ten years. It can be effectively used in an environment that can provide ordinary paediatric medical care and general orthopaedic expertise. The outcomes compare with supracondylar fractures treated surgically in specialist centres

Introduction The efficacy of traction for disc protrusion with neurological deficit, as in published trials, has been disappointing. Yet it is common for patients to experience relief of symptoms during short periods of traction. My thesis is that if traction is helpful, the patient needs to have it every day and preferably a few times a day. Methods This is a pilot study of a simple form of traction equipment which the patient uses at home. The criteria for inclusion of patients in the study has been; (a) diagnosis of disc protrusion with nerve root involvement made on the basis of history and clinical examination (before radiography); (b) evidence of neurological deficit on examination, and (c) findings on MRI Scan consistent with the diagnosis. Seventy one (71) were admitted to the trial, 43 males and 28 females; age range 23 to 60. Prior to referral several patients had already been advised to have surgery; two were actually booked-in for surgery (and both of these improved sufficiently to avoid surgery). Pain intensity and level of disability are detailed. Previous treatment is detailed. Results The majority of patients had significant improvement, as gauged by pain VAS, resumption of work and resumption of recreational activities. Only one patient required surgery. Discussion The home-traction was always supplemented by a gradually upgraded exercise program. Once the patient had been instructed in the use of the home equipment, they would be reviewed at only weekly or fortnightly consultations during the acute phase, hence as the treatment was essentially dependent upon self-help measures at home, the overall cost of this program of treatment for disc protrusion is inexpensive. This pilot study justifies a controlled clinical trial of gravity traction

There is still some controversy about the reduction of unilateral and bilateral facet dislocations in the cervical spine. We have reviewed the notes and radiographs of 210 such patients; reduction was attempted by manipulation under anaesthesia (MUA) in 91, and by rapid traction under sedation in 119, using weights up to 150 lb (68 kg). Our results suggest that early reduction in patients with neurological deficit gives the best chance of neurological recovery, that rapid traction is more often successful than MUA, and that traction is safer than MUA. We found that the use of heavy weights with close monitoring was safe and brought about reduction in an average time of 21 minutes. We recommend this technique for the reduction of all cervical facet dislocations

We studied 16 hips (eight cadaver specimens) using arthrography, arthroscopy and anatomical dissection, under incremental traction of up to a maximum of 64 kg, to determine the relationship of the portals to nearby neurovascular structures. The distance of each arthroscopic portal (anterior, anterolateral, and posterolateral) to the associated neurovascular structures was measured after the application of 23 kg of traction. Traction of up to 64 kg on the lower limb failed to produce evidence of labral or capsular injury. Furthermore, traction of 23 kg resulted in little change in the position of adjacent neurovascular structures relative to the standard arthroscopic portals

The perineal traction post has been reported to cause pressure sores, skin necrosis, and pudendal nerve palsy. Tissue pressures of 70 mm Hg applied for two hours have been shown to result in microscopic tissue change whilst pressures of 1.4 kg/cm. 2. for 90 minutes produced severe or complete nerve conduction block. To demonstrate perineal traction post interface pressures. To assess effect of padding type on these pressures. Healthy volunteers were positioned supine on the traction table with the right lower limb supported in flexion and abduction. Longitudinal traction of 40kg was applied to the left lower limb through the boot. Pressures were measured using a pressure pad consisting of individual calibrated inch square pressure cells. The pad was placed around the traction post. Five different types of padding were used on a standard traction post. These were: gamgee, small gel pad, 10cm gel bolster, 10cm soft foam roll and 10cm hard foam roll. With each device, the leg was positioned in neutral, internal rotation, external rotation and adduction. Pressure readings and pain scores were recorded with each manoeuvre. Maximum pressures were experienced with the gamgee wrap. All subjects noted their highest pain score here. Peak pressures of 100 mm Hg were demonstrated over the ischial tuberosity and adductor tendons. The larger padding devices resulted in significantly lower pressures. Of the different positions, adduction was that which resulted in highest pressures and pain scores, though this was not significant. The highest pressures exceeded the 70 mm Hg limit known to cause tissue damage. These pressures can be reduced with alteration of the padding. In all procedures it is important to pad the post carefully and use adducted positions for as short a time as possible

The effect of calcaneal traction on the compartmental pressure in the legs of five individuals with tibial fractures was studied. Mean resting pressures without traction were found to be 31.9 mmHg for the deep posterior compartment and 27.0 mmHg for the anterior compartment. For each kilogram weight of traction applied the deep posterior pressure rose by 5.7 per cent of the resting value and the anterior pressure by 1.6 per cent. It is suggested that the weight of traction should be only sufficient to render the patient comfortable and maintain alignment of the limb. Excessive traction is likely to increase the risk of compartmental ischaemia. The application of six kilograms of traction would raise the mean resting pressure by 34 per cent from 31.9 to 42.7 mmHg