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Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_19 | Pages 24 - 24
1 Apr 2013
Jalgaonkar A Mohan A Dawson-Bowling S Muthukumar T Pollock R Skinner J Cannon S Briggs T Aston W
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Introduction

Local recurrence of tumours along the biopsy tract is a known complication of percutaneous closed needle biopsy. Correct surgical management requires preoperative identification and excision of the biopsy tract at time of surgery. These tracts become increasingly difficult to identify with time, leading to risk of inadequate excision of the biopsy tract and recurrence of the tumour at the biopsy site.

Materials/Methods

In a prospective study conducted at our institution, 22 of the 45 patients with musculoskeletal tumours (49%) had unidentifiable biopsy sites, with a mean duration between biopsy and definite surgery being 98 days (range 13–164 days). We concluded that identification of the biopsy site was more difficult after 50 days. Radiotherapy related scar formation and the longer time duration between biopsy and definite surgery in patients requiring neoadjuvant therapy made identification more unlikely. Consequently, all patients received India ink skin tattoo to mark the biopsy site at the time of the needle biopsy. 56 patients were then prospectively reviewed on the day of surgery to identify the biopsy site.


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_1 | Pages 31 - 31
1 Jan 2013
Dhinsa B Gallagher K Dawson-Bowling S Mohan A Miles J Carrington R Skinner J Briggs T
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Introduction

The aim of this study was to see if the evaluation of the initial postoperative radiograph following primary knee and hip arthroplasty correlated with clinical outcome at five years postoperatively.

Methodology

Using our institution database we identified forty-nine hip replacements and fifty-two knee replacements performed between 2000 and 2006. All the patients underwent postoperative radiographs one day after surgery and clinical evaluation up to at least five years postoperatively. A consultant radiologist evaluated the radiographs for alignment and component position. The hip arthroplasty patients were assessed clinically using the Harris hip score, Oxford hip score, and the Western Ontario and McMaster Universities Osteoarthritis index (WOMAC). The knee arthroplasty patients were assessed using the Knee Society score, Oxford knee score, and the WOMAC score.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXVII | Pages 321 - 321
1 Sep 2012
Jalgaonkar A Mohan A Pollock R Skinner J Cannon S Briggs T Aston W
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Percutaneous biopsies can lead to seeding of tumour cells along the biopsy tract.

Correct surgical management requires preoperative identification and excision of the biopsy tract at time of surgery. These tracts become increasingly difficult to identify with time, leading to risk of inadequate excision of the biopsy tract and recurrence of the tumour at the biopsy site. We conducted a prospective study involving 45 patients who had tissue biopsies for bone and soft tissue tumours between February and May 2008. All the biopsies were performed by consultant radiologist under ultrasound or CT guidance. Case note analysis, patient history and examination at the time of surgery were used to collect data. 23 of 45 patients had accurate identification of the biopsy tract by the surgeon at the time of excision. The mean time between biopsy and excision was 52 days (range 6–140). 22 of 45 patients had unidentifiable biopsy site, with the mean time between biopsy and excision being 98 days(range 13–164) p=0.0004(paired t test). All 4 patients who received post-biopsy radiotherapy had unidentifiable biopsy site tract (mean duration 104 days) and 11 of the 18 patients who underwent neoadjuvant chemotherapy had an unidentifiable biopsy tract (mean duration 108 days). We concluded that identification of biopsy site was more difficult after 50 days, especially in patients who underwent radiotherapy and chemotherapy.

Following this study, all the patients who had biopsies of tumours had the site marked with India ink tattoo. We, then prospectively reviewed 36 patients between July and September 2010 who underwent excision of bone and soft tissue tumours and had their biopsy sites marked with India ink tattoo. After needle biopsy, one drop of the dye was applied at the site of the biopsy. This was taken up by capillary action beneath the dermis and remained present until the patient returned for their definitive surgery. The biopsy site was easily identifiable by the patients and the operating surgeon in all 36 patients. The mean time between biopsy and surgery was 77 days (range 10–299 days). Tattooing of the skin enabled the surgeon to accurately excise the biopsy tract along with the tumour. We recommend this technique of tattooing of the biopsy site with India ink, as it is safe, easily recognisable and permits accurate excision of the tract (including the tattoo), therefore preventing biopsy tract recurrence.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXIX | Pages 131 - 131
1 Sep 2012
Mohan A Vadher J Ismail H Warwick D
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Aim

To construct and validate a simple patient related outcome measure scheme to quantify the disability caused by Dupuytren's Disease thus enabling prioritisation of treatment, allow reliable audit of surgical outcome and support future research.

Methods

The Southampton Dupuytren's Scoring System (SDSS) was developed in a staged fashion according to the recommendations of Derby Outcomes Conference.

item generation from questionnaire filled in by 20 patients;

item reduction to create a 20-question proforma;

Internal consistency (Cronbach's alpha)

Test-retest (3 week interval testing on 61 patients)

Field management was used to assess the user friendliness of the scoring system.

Sensitivity to change Standardised response mean

Construct validity: ability of the SDSS to measure what it is supposed to measure. comparing SDSS with QuickDASH (Disability of Arm, Shoulder and Hand)


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXXVII | Pages 530 - 530
1 Sep 2012
Mohan A Jalgaonkar A Park D Dawson-Bowling S Aston W Cannon S Briggs T
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Sacral tumours are rare and can present difficult diagnostic and therapeutic challenges even at an early diagnosis. Surgical resection margins have a reported prognostic role in local recurrence and improved survival. Successful management is achieved within a specialist multidisciplinary service and involves combination chemotherapy, radiotherapy and surgery. We present our experience of patients with sacral tumours referred to our unit, who underwent total and subtotal sacrectomy procedures.

Materials and Methods

Between 1995 and 2010, we identified twenty-six patients who underwent a total or subtotal sacrectomy operation. Patients were referred from around the United Kingdom to our services. We reviewed all case notes, operative records, radiological investigations and histopathology, resection margins, post operative complications, functional outcomes and we recorded long-term survival outcomes. Patients who were discharged to local services for continued follow up or further oncological treatment were identified and information was obtained from their general practitioner or oncologist. We reviewed the literature available on total sacrectomy case series, functional outcomes and soft tissue reconstruction.

Results

We reviewed 26 patients, 16 male and 10 female, with a mean age at presentation of 53.4 years (range 11–80 years). Duration of symptoms ranged from 2 weeks to 6 years; lower back pain and sciatica were amongst the most common presenting features. Histological diagnoses included chordoma, Ewing's, malignant peripheral nerve sheath tumour, chondromyxoid fibroma, spindle cell sarcoma, synovial sarcoma, chondrosarcoma. A combined approach was used in two-thirds of patients and most of these patients had a soft tissue reconstruction with pedicled vertical rectus myocutaneous flap. Complications were categorised into major and minor and subdivided into wound, bladder and bowel symptoms. Wound complications and need for further intervention were more common amongst the patient group who did not have simultaneous soft tissue reconstruction at operation. All patients had a degree of bladder dysfunction in the early postoperative period. We present survivorship curves including recurrence and development of metastases.


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXV | Pages 103 - 103
1 Jun 2012
Jalgaonkar A Mohan A Park D Dawson-Bowling S Aston W Cannon S Skinner J Briggs T
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There is very limited literature available on the use of prosthetic replacement in the treatment of primary and secondary tumours of the radius. In the past these were treated with vascularised and non-vascularised autografts which had associated donor site morbidity, problems of non union, graft or junctional fractures and delayed return to function. Our study is a mid to long term follow-up of implant survivorship and the functional outcome of metal prosthetic replacement used for primary and metastatic lesions of radius. We had 15 patients (8 males:7 females) with a mean age of 53 years. 8 patients underwent proximal radial replacement, 2 with mid-shaft radial replacement and 6 patients had distal radial replacements with wrist arthrodesis. The indications for replacement included metastatic lesions from renal cell carcinoma, primary giant cell tumours, ewings' sarcoma, chondroblastoma, radio-ulnar synostosis and benign fibrous histiocytoma. The average follow up was 5 years and 6 months (range 3 months - 18 years). Four patients died as a result of dissemination of renal cell carcinoma and two patients were lost to follow-up. There were no complications with the prosthesis or infection. Clinically and radiographically there was no loosening demonstrated at 18 years with secure fixation of implants. Two patients developed interossoeus nerve palsies which partially recovered. Functional outcomes of the elbow were assessed using the Mayo performance score with patients achieving a mean score of 85 postoperatively (range 65-95). All but one patient had full range of motion of the elbow. The patient with radio-ulnar synostosis had a 25 degree fixed flexion pot-operatively. Although the distal radial replacements had decreased range of movements of the wrist due to arthrodesis, they had excellent functional outcomes. Only one patient required revision surgery due to post-traumatic loosening of the implant. Our results of the use of endoprosthetic replacement of radius in the treatment of tumours are encouraging with regards to survivorship of the implant and functional outcome. This type of treatment results in an early return to daily routine activties, good functional outcome and patient satisfaction.


Orthopaedic Proceedings
Vol. 92-B, Issue SUPP_II | Pages 325 - 325
1 May 2010
Mohan A Lemon M Barrett D
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Removal of solidly fixed implants is a challenge in revision knee arthroplasty. It is fraught with the risk of intraoperative fractures and bone stock vital for the success of subsequent revision surgery. We describe the double extraction technique for extraction of solidly fixed implants. This technique was first tested in laboratory setting and then replicated in the operation theatre with successful results.

In this retrospective study we analysed all our patients in which we used the double extraction technique for the removal of solidly fixed implants. In this procedure, the surgeon and the assistant each place an osteotome on the cement metal interface at symmetric positions, directly opposite each other on the medial and lateral sides. They deliver synchronous blows with a mallet at positions around the interface until the cement fractures. The femoral component can then be easily removed. The technique was tested in a laboratory before it was used clinically. Polyurethane mouldings, representing a suitable substrate for cementing metal components were fixed on to a steel rod of similar weight and length as the lower leg. Stainless steel discs (40mm diameter x 4mm thickness) were cemented on to the polyurethane substrate to form a model of a cemented implant. The discs were instrumented to allow recording of the mechanical processes caused by the double extraction technique and to allow comparison with the single osteotome extraction technique. The methodology successfully demonstrated that the double osteotome technique increases the contact force of the second blow. When the synchronous blows are delivered, less energy is expended in the movement of tibia and more is contributed to the removal of the component.

In this study we looked at a total of 206 patients were the solidly fixed tibial and femoral components were removed using the double extraction technique. There were 86 men and 126 women. The mean age of the patients was 66.8 years (range 37–87 years). Only patients with solidly fixed implants were included in this study. Stability of implants was assessed with preoperative radiographs and then confirmed intraoperatively. Patients with loose implants intraoperatively were excluded from this study. We present our results with use of this technique in 206 patients with follow up of 1 to 5 years.


Orthopaedic Proceedings
Vol. 91-B, Issue SUPP_III | Pages 411 - 411
1 Sep 2009
Mohan A Lemon M Browne M Barrett D
Full Access

Removal of solidly fixed implants is a challenge in revision knee arthroplasty. It is fraught with the risk of intraoperative fractures and bone stock vital for the success of subsequent revision surgery. We describe the double extraction technique for extraction of solidly fixed implants. This technique was first tested in laboratory setting and then replicated in the operation theatre with successful results.

In this retrospective study we analysed all our patients in which we used the double extraction technique for the removal of solidly fixed implants. In this procedure, the surgeon and the assistant each place an osteotome on the cement metal interface at symmetric positions, directly opposite each other on the medial and lateral sides. They deliver synchronous blows with a mallet at positions around the interface until the cement fractures. The femoral component can then be easily removed. The technique was tested in a laboratory before it was used clinically. Polyurethane mouldings, representing a suitable substrate for cementing metal components were fixed on to a steel rod of similar weight and length as the lower leg. Stainless steel discs (40mm diameter × 4mm thickness) were cemented on to the polyurethane substrate to form a model of a cemented implant. The discs were instrumented to allow recording of the mechanical processes caused by the double extraction technique and to allow comparison with the single osteotome extraction technique. The methodology successfully demonstrated that the double osteotome technique increases the contact force of the second blow. When the synchronous blows are delivered, less energy is expended in the movement of tibia and more is contributed to the removal of the component.

In this study we looked at a total of 206 patients were the solidly fixed tibial and femoral components were removed using the double extraction technique. There were 86 men and 126 women. The mean age of the patients was 66.8 years (range 37–87 years). Only patients with solidly fixed implants were included in this study. Stability of implants was assessed with preopera-tive radiographs and then confirmed intraoperatively. Patients with loose implants intraoperatively were excluded from this study. We present our results with use of this technique in 206 patients with follow up of 1 to 5 years.


Orthopaedic Proceedings
Vol. 90-B, Issue SUPP_III | Pages 496 - 497
1 Aug 2008
Mohan A Ramesh P Curtis M
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Introduction: There are no guidelines for the use of any particular tourniquet in foot surgery. We undertook this prospective randomised study to assess the efficacy of the S-MART TM tourniquet in foot surgery as compared to the pneumatic tourniquet. A literature review confirms this is the first randomised controlled study objectively measuring the outcomes of this tourniquet system.

Material and Methods: We included 40 consecutive patients who had foot surgery from May 2006 to August 2006. Informed consent with local medical ethics committee approval was obtained. We excluded patients with history of diabetes mellitus, deep vein thrombosis, fractures, limb circumference more than 40 centimetres and smokers. The ease of application of tourniquet, intraoperative bloodless field and ease of removal was scored on a scale of 1–10. Patients were followed up at 2 weeks.

Results: 20 patients were randomised into group one with pneumatic tourniquet (average age 63.36) and 20 patients in group two with S-MART TM tourniquet (average age 61.25). The average tourniquet placement time in-group one was 144.36 seconds as compared to 12 seconds ingroup two. The mean ease of application scores was 4.27 in-group one as compared to 1.46 in-group two. Total tourniquet time was more in-group one. Intraoperative haemostasis was rated higher in-group two.

Discussion: SMART TM tourniquet provides a good intraoperative haemostasis and is easy to apply. This tourniquet helps to exsanguinate; this frees up theatre personnel, saves resources and decreases tourniquet time for surgery.

The limitation is it cannot be reinflated and cannot be used in patients with fractures.

Conclusion: S-MART tourniquet is a good for foot surgery, provides a good operative field, is easy to apply and saves precious theatre time and resources.