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Orthopaedic Proceedings
Vol. 105-B, Issue SUPP_14 | Pages 7 - 7
10 Oct 2023
Chambers M Madeley N
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Stable Weber B fractures are typically treated non-operatively without complications but require close monitoring due to concerns over potential medial deltoid ligament injuries and the risk of delayed talar shift. Following recent evidence suggesting this is unlikely, a functional protocol with early weight bearing was introduced at Glasgow Royal Infirmary (GRI) following a pilot audit.

This study aims to evaluate the risk of delayed talar shift in isolated Weber B fractures managed with functional bracing and early weight-bearing, particularly if signs of medial ligament injury are present.

We conducted a retrospective review of 148 patients with isolated Weber B fractures without talar shift at presentation that were reviewed at the virtual fracture clinic at our institution between July 2019 and June 2020. The primary outcome was the incidence of delayed talar shift. Secondary outcomes were other complications and adherence to protocol.

48 patients had medial signs present and of these 1 (2%) showed possible talar shift on X-rays at 4 weeks, and was kept under review. This patient had a normal medial clear space at 3 months. No patients with medial signs not documented (n=19) or not present (n=81) had delayed talar shift. 10% of patients (n=15) had at least 1 complication: delayed union (n=2); non-union (n=3); ongoing pain (n=14).

Functional bracing with early weight-bearing is a safe, effective protocol for managing isolated Weber B fractures without initial talar shift. This study concludes that the risk of delayed talar shift is low in all patients, with or without medial signs.


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_31 | Pages 45 - 45
1 Aug 2013
Chambers M Diffin C Campton L Roberts J Kelly M
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A tip-apex distance (TAD) greater than 25 mm is a strong predictor of screw cut-out in patients with intertrochanteric femoral fracture treated with a dynamic hip screw (DHS). We aim to show you a simple and reliable way to check this.

By calculating the sum of the distance from the tip of the screw to the apex of the femoral head on anteroposterior and lateral views the TAD is found. X-rays often have magnification errors and therefore measuring tools in digital x-ray systems will be inaccurate. The original method of calculating the TAD uses the known diameter of the screw to avoid magnification errors.

We found that due to the no-cylindrical shape of the screw shaft there is potential of an inaccurate measurement. By using the distance across the highest points of the thread a more accurate TAD can be calculated.

The distance across the highest points of the threads in all three of the most commonly used DHSs in the UK is 13 mm. If the measured distance from the tip of the screw to the apex of the femoral head in both the anteroposterior and lateral views is less than the measured distance across of the treaded diameter of the screw then the surgeon knows the TAD is less than 26 mm. This method can be used intraoperatively to check the TAD by looking at the fluoroscopy images in these two views.


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_31 | Pages 15 - 15
1 Aug 2013
Diffin C Chambers M Campton L Roberts J
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Posterior soft tissue repair is often performed in Total Hip Arthroplasty (THA). Many reports have shown the advantage of posterior soft tissue repair in reducing their prosthetic hip dislocation rates.

We describe an easy and inexpensive way of passing sutures through small drill holes in the Greater Trocanter to re-attach muscle, tendon and capsule in a posterior soft tissue repair.

By using a reversed monofilament suture on a straight needle held in artery forceps and passing this in a retrograde direction through a drill hole, a suture capturing device is produced.

By capturing the long ends of sutures tied in the short external rotators and the posterior capsule of the hip through 2 drill holes in the Greater Trochanter, a posterior soft tissue repair can be performed. We have used this technique successfully in over 100 consecutive THAs.

We conclude that the use of a monofilament suture used in the manner describe is an excellent and inexpensive way to aid in a posterior soft tissue repair in THAs. This is done without the cost of an additional dedicated suture passing device. The suture could also be used in the skin closure if desired.


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_31 | Pages 60 - 60
1 Aug 2013
Milne S Platt K Chambers M Hussain N
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Osteoarthritis of the trapezometacarpal joint is a common form of arthritis. At present, there is a significant void between conservative and operative managements. Viscosupplementation is occasionally considered as an in-between therapy.

We aimed to compare the therapeutic benefit of a single intra-articular injection of Sodium Hyaluronate (SH; OstenilĀ®mini) to a single intra-articular injection of Methylprednisolone Acetate (MA; Depomedrone) in the management of rhizarthrosis (TMOA; Trapezometacarpal Osteoarthritis).

A retrospective review was performed over a 12 month period. We reviewed 25 patients who had received a single injection of viscosupplementation (SH) performed with fluoroscopic guidance and had been followed up at 12 weeks. These patients were compared with 21 patients who had received a single steroid injection (MA) and had been followed up at 12 weeks.

Of the SH group, 52% (n = 13) reported some benefit from the injection. The MA group reported an 86% (n=18) benefit from the injection.

We found that a single injection of viscosupplementation (SH) is effective in relieving pain and improving function in about half of patients with rhizarthrosis (TMOA). The efficacy of a single steroid injection (MA), however, was superior with a far greater proportion of patients reporting analgesic and functional benefits.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXIX | Pages 63 - 63
1 Jul 2012
McKenna R Latif A McLeery M Chambers M Rooney B Leach W
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Aim

We aim to compare post-operative length of stay and cardiopulmonary morbidity in patients randomised to either navigated or conventional total knee arthroplasty (TKA).

Method

Patients undergoing primary TKA for osteoarthritis were prospectively assigned randomly to either navigation-guided or control groups and blinded to this.

All patients received a PFC implant (DePuy, Warsaw, IN). In the control group the standard femoral intramedullary and tibial extramedullary alignment rod was used. In the navigation group, the BrainLab (Munich, Germany) navigation system was used. All operations were carried out by one of two consultant orthopaedic knee surgeons.

Length of post operative hospital stay and the development of cardiopulmonary complication were recorded and groups compared.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXVIII | Pages 42 - 42
1 Jun 2012
McKenna R Latif A McLeery M Chambers M Rooney B Leach W
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We aim to compare post-operative length of stay and cardiopulmonary morbidity in patients randomised to either navigated or conventional total knee arthroplasty (TKA).

Patients undergoing primary TKA for osteoarthritis were prospectively assigned randomly to either navigation-guided or control groups and blinded to this.

All patients received a PFC implant (DePuy, Warsaw, IN). In the control group the standard femoral intramedullary and tibial extramedullary alignment rod was used. In the navigation group, the BrainLab (Munich, Germany) navigation system was used. All operations were carried out by one of two consultant orthopaedic knee surgeons.

Length of post operative hospital stay and the development of cardiopulmonary complication were recorded and groups compared.

100 patients were recruited (55 control vs 45 navigated). Patient demographics were similar in both groups.

Mean length of stay was 7 days in the control group (range 3-101), 5 days in the navigation group (range 3-10). The mode was 4 days in both groups.

7 patients (13%) stayed for >7 days in the control group, 3 patients (7%) stayed >7 days in the navigation group(p=0.339).

4 patients(7%) required >10 days inpatient stay in the control group, 0 patients required to stay in hospital for longer than 10 days in the navigation group(p=0.069).

The causes for the length of stay exceeding 10 days were pulmonary embolus in 3 patients, and chest infection in 1 patient.

Patients undergoing navigation-guided TKA required shorter post-operative inpatient stays than those undergoing arthroplasty using conventional techniques. Fewer patients in the navigation group required stays longer than 7 or 10 days. The difference in post-operative stay was associated with fewer respiratory complications in the navigated group.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XVII | Pages 18 - 18
1 May 2012
McCoy S Chambers M Gray A Kelly M Rana B Roberts J
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Introduction

The Western Infirmary/Gartnavel General Hospital orthopaedic department is geographically located next to the Beatson Oncology Centre, a specialist regional oncology unit. Pathological femoral fractures are the commonest reason for surgical intervention in patients referred from the Beatson and we have used them as a model to establish the demographic data, referral patterns, treatment results, and survival characteristics in such a group of patients.

Methods

We have collected prospective data for the last 4 years on referrals from patients under the care of oncology services.


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_III | Pages 564 - 564
1 Aug 2008
Chambers M Roberts J Kelly M
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With the advent of the advancement of manufacturing technologies hip resurfacing (HR) has become a serious option for a younger patient with osteoarthritis of the hip. The operation is technically demanding and correct placement of the femoral component is the critical step.

We hypothesised that with computer navigation we can improve the placement of the femoral component and restore the biomechanics of the hip joint compared to currently available mechanical jigs.

We compared the radiological results and operation time in 8 patients undergoing computer navigated hip resurfacings (cnHR) to 30 patients undergoing mechanical jig hip resurfacings (jigHR).

Our results showed the average angle of the central pin in the femoral neck in the jigHR group was 141 degrees on the AP radiographs (range 131 to 154 degrees) and 6 degrees antevertion (range 0 to 8 degrees) on the lateral radiographs compared with 135 degrees (range 134 to 138 degrees)and 5 degrees (range 3 to 8 degrees)in the cnHR group. The position of the central pin in the neck immediately below the head was off-centre in the jigHR group on average by 4mm in both AP and lateral radiographs and never more than 2mm in the cnHR group in either view. Offset was increased on average 5mm in the jigHR group and decreased on average by 3mm in the cnHR group. The average operation time was 107 minutes in the jigHR group and 110 minutes in the cnHR group.

We conclude that despite our relatively small sample group we have showed computer navigation gives consistent optimum positioning of the femoral component and improves the biomechanics of the hip. This was without increasing operating time.