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Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_XXIII | Pages 45 - 45
1 May 2012
Coolican M Biswal S Parker D
Full Access

Femoral nerve block is a reliable and effective method of providing anaesthesia and analgesia in the peri-operative period but there remains a small but serious risk of neurological complication. We aimed to determine incidence and outcome of neurological complications following femoral nerve block in patients who had major knee surgery. During the period January 2003 to August 2008, medical records of all patients undergoing knee surgery by Dr Myles Coolican and Dr David Parker, who had been administered femoral block for peri-operative analgesia, were evaluated. Patients with a neurological complication were invited take part in the study. A detailed physical examination including sensory responses, motor response and reflexes in both limbs was performed by an independent orthopaedic surgeon. Subjective outcome and pain specific questionnaires as well as clinical measurements were also collected. Out of 1393 patients administered with femoral nerve block anaesthesia during this period, 28 subjects (M:F= 5:23) were identified on the basis of persistent symptoms (more than three months) of femoral nerve dysfunction. All the patients had sensory dysfunction in the autonomous zone of femoral nerve sensory distribution. The incidence of neurological complications was 2.01%. One patient was deceased of unrelated causes and five patients declined to participate in the study. 14 patients out of the 22 have been examined so far. Nine cases had a one shot nerve block and five had continuous peripheral nerve block catheter. Areas of hypoesthesia/anaesthesia involving femoral nerve distribution occurred in 7 subjects and hyperaesthesia/paresthesia occurred in four. One subject had a combination of hypoesthesia and hyperesthesia in different areas of the femoral nerve distribution. Three subjects had bilateral symptoms following bilateral simultaneous nerve blocks. Dysesthesias in the affected dermatomes were found in seven cases and paresthesias were found in eight cases. Douleur Neuropathique en 4 questions (DN4) score of ï. 3. 4 was found in all the patients (average value: 5.55). The average scores for tingling, pins and needles and burning sensation (in a scale from 0 to 10) are 3.8, 3.1 and 2.9 respectively. The incidence of persistent neurological complication after femoral nerve block in our series is much higher compared to the reported incidence in the contemporary literature (Auroy Y. et al. Major complications of regional anesthesia in France: Anesthesiology 2002; 97:1274 80). The symptoms significantly influence the quality of life in the affected cases and question the value of the femoral nerve block in knee surgery


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_7 | Pages 83 - 83
1 Apr 2017
Lombardi A
Full Access

Not all knee surgery cases are created equal is a maxim that holds true for both primary and revision scenarios. Complex cases involve patients presenting with compromised bone and/or soft tissue. For primary knees, these include cases with bony deformity or deficiency, severe malalignment, arthrofibrosis, ligamentous instability or contracture, prior fracture or trauma with or without failed fixation, prior hardware complicating component placement, or compromised extensor mechanism. In revision surgery, complex scenarios include cases compromised by bone loss, deterioration of the soft tissues and resulting instability, periprosthetic fracture, leg length discrepancy, infection, and more recently, hypersensitivity reactions. In this interactive session, a moderator and team of experts will discuss strategies for evaluation and management of a variety of challenging knee case scenarios


Orthopaedic Proceedings
Vol. 94-B, Issue SUPP_IV | Pages 153 - 153
1 Mar 2012
Pradhan N Gupta V Clarke V
Full Access

Aim. To evaluate the costs of performing revision hip and knee surgery at a District General Hospital. Methods. A retrospective review of all revision hip and knee surgery between October 2004 and October 2006 was performed. Information was obtained from the notes and theatre log books. Each case was fully costed. The breakdown costs included implant choice, theatre time, length of stay, allograft, blood products and post-operative physiotherapy/OT. The costs were obtained from the hospital financial department and theatre invoices. Payment to the hospital is based on a specific tariff which in turn is determined by coding each patient episode. We individually coded every case, using the OPCS 4.3 coding system, and applied the appropriate tariff. The tariffs that the financial department had applied to each case were also available. A comparison was made between actual costs incurred, the expected reimbursement (from our study coding) and the actual reimbursement received (from finance department). Results. 167 revision procedures were performed (108 hips and 59 knees). The total incurred cost of revision hip surgery was £930,156 (mean £8,613 per case). The expected total reimbursement according to our coding was £938,325 (mean £8,688). The total reimbursement actually received was £806,836 (mean £7,471). The total incurred cost of revision knee surgery was £493,357 (mean £8,362). The expected total reimbursement according to our coding was £499,042 (mean £8,458). The total reimbursement was £419,157 (mean £7,104). Conclusions. Inadequate coding results in reduced income. If strict coding practices are adhered to then performing revision hip and knee surgery should be financially viable at a district general hospital


Orthopaedic Proceedings
Vol. 101-B, Issue SUPP_8 | Pages 38 - 38
1 May 2019
MacDonald S
Full Access

This session will present a series of challenging and complex primary and revision cases to a panel of internationally respected knee arthroplasty experts.

The primary cases will include challenges such as patient selection and setting expectations, exposure, alignment correction and balancing difficulties. In the revision knee arthroplasty scenarios issues such as bone stock loss, fixation challenges, instability and infection management will be discussed.

This will be an interactive case-based session that at its conclusion should leave the attendee with a more thorough approach to these challenging issues.


Orthopaedic Proceedings
Vol. 100-B, Issue SUPP_10 | Pages 88 - 88
1 Jun 2018
Vince K
Full Access

Clinical cases will be presented to a panel of experienced arthroplasty surgeons to illustrate how principles tempered by experience, are applied to challenging problems. (request pertinent additional material from kellyvince@mac.com)


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_15 | Pages 38 - 38
1 Aug 2017
MacDonald S
Full Access

This session will present a series of challenging and complex primary and revision cases to a panel of internationally respected knee arthroplasty experts.

The primary cases will include challenges such as patient selection and setting expectations, exposure, alignment correction and balancing difficulties. In the revision knee arthroplasty scenarios issues such as bone stock loss, fixation challenges, instability, and infection management will be discussed.

This will be an interactive case based session that at its conclusion should leave the attendee with a more thorough approach to these challenging issues.


Orthopaedic Proceedings
Vol. 98-B, Issue SUPP_22 | Pages 81 - 81
1 Dec 2016
Thornhill T
Full Access

This session will deal with common problems and challenges in knee arthroplasty surgery. It will include discussion of indications, surgical options, surgical technique, and management of complications.

This symposium is intended to focus on common problems that face all of us as orthopaedic surgeons rather than deal with issues that are almost never encountered. The panel includes a group of experienced surgeons who deal with such problems in their own practice.


Orthopaedic Proceedings
Vol. 98-B, Issue SUPP_17 | Pages 38 - 38
1 Nov 2016
MacDonald S
Full Access

This session will present a series of challenging and complex primary and revision cases to a panel of internationally respected knee arthroplasty experts.

The primary cases will include challenges such as patient selection and setting expectations, exposure, alignment correction and balancing difficulties. In the revision knee arthroplasty scenarios issues such as bone stock loss, fixation challenges, instability and infection management will be discussed.

This will be an interactive case-based session that at its conclusion should leave the attendee with a more thorough approach to these challenging issues.


Orthopaedic Proceedings
Vol. 97-B, Issue SUPP_13 | Pages 38 - 38
1 Nov 2015
Della Valle C
Full Access

This session will present a series of challenging and complex primary and revision cases to a panel of knee arthroplasty experts. A variety of cases representing the spectrum of not uncommonly presenting pathologies will be discussed in terms of appropriate work-up, clinical management, surgical approach, and aftercare. This will be an interactive case-based session that at its conclusion should leave the attendee with a more thorough approach to these challenging issues.


Orthopaedic Proceedings
Vol. 97-B, Issue SUPP_1 | Pages 86 - 86
1 Feb 2015
Vince K
Full Access

“Expert opinion” is the lowest totem on the academic pole- and yet, “evidence based” medicine does not always provide us answers for the particular, the unusual clinical problem. Well-controlled studies are precisely that: “well controlled”. Life may be randomised, but falls short of being “well controlled”.

The challenge and honor of moderating a panel of experienced and articulate colleagues is to bring out “how they think” and how they formulate a plan for complex cases. The panel members are not only experienced practitioners, but they are the authors of studies that shape our profession. What are the limits to the studies they have published? What insight can they provide us to help understand “level 1” data more astutely? What biases and assumptions support their methods? Nothing achieves that with greater clarity than presentation of complex cases to an accomplished panel.

Several ordinary clinical problems are presented to establish current practice, followed by the unexpected outcomes to illustrate how experts deal with adversity.


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_6 | Pages 76 - 76
1 Mar 2017
Walker P Meere P Salvadore G Oh C Chu L
Full Access

INTRODUCTION

Ligament balancing aims to equalize lateral and medial gaps or tensions for optimal functional outcomes. Balancing can now be measured as lateral and medial contact forces during flexion (Roche 2014). Several studies found improved functional outcomes with balancing (Unitt 2008; Gustke 2014a; Gustke 2014b) although another study found only weak correlations (Meneghini 2016). Questions remain on study design, optimal lateral-medial force ratio, and remodeling over time. Our goals were to determine the functional outcomes between pre-op and 6 months post-op, and determine if there was a range of balancing parameters which gave the highest scores.

METHODS

This IRB study involved a single surgeon and the same CR implant (Triathlon). Fifty patients were enrolled age 50–90 years. A navigation system was used for alignments. Balancing aimed for equal lateral and medial contact forces throughout flexion, using various soft tissue releases (Meneghini 2013; Mihalko 2015). The patients completed a Knee Society evaluation pre-op, 4 weeks, 3 months and 6 months. The total (medial+lateral) force, and the medial/(medial+lateral) force ratio was calculated for 4 flexion angles and averaged. These were plotted against Pain, Satisfaction, Delta Function (postop – preop), and Delta Flexion Angle. The data was divided into 2 groups. 1. By balancing parameters. T-Test for differences in outcomes between the 2 groups. 2. By outcome parameters. T-Test for differences in Balancing Parameters between the two groups.


Orthopaedic Proceedings
Vol. 96-B, Issue SUPP_12 | Pages 38 - 38
1 Jul 2014
Vince K
Full Access

“Expert opinion” is the lowest totem on the academic pole and yet, “evidence based” medicine does not always provide us answers for the particular, the unusual clinical problem. Well-controlled studies are precisely that: “well-controlled”. Life may be randomised, but falls short of being “well-controlled”.

The challenge and honor of moderating a panel of experienced and articulate colleagues is to bring out “how they think” and how they formulate a plan for complex cases. The panel members are not only experienced practitioners, but they are the authors of studies that shape our profession. What are the limits to the studies they have published? What insight can they provide us to help understand “level 1” data more astutely? What biases and assumptions support their methods? Nothing achieves that with greater clarity than presentation of complex cases to an accomplished panel.

Several ordinary clinical problems are presented to establish current practice, followed by the unexpected outcomes to illustrate how experts deal with adversity.


Orthopaedic Proceedings
Vol. 96-B, Issue SUPP_8 | Pages 83 - 83
1 May 2014
Vince K
Full Access

“Expert opinion” is the lowest totem on the academic pole- and yet, “evidence based” medicine does not always provide us answers for the particular, the unusual clinical problem. Well-controlled studies are precisely that: “well controlled”. Life may be randomised, but falls short of being “well controlled”.

The challenge and honor of moderating a panel of experienced and articulate colleagues is to bring out “how they think” and how they formulate a plan for complex cases. The panel members are not only experienced practitioners, but they are the authors of studies that shape our profession. What are the limits to the studies they have published? What insight can they provide us to help understand “level 1” data more astutely? What biases and assumptions support their methods? Nothing achieves that with greater clarity than presentation of complex cases to an accomplished panel.

Several ordinary clinical problems are presented to establish current practice, followed by the unexpected outcomes to illustrate how experts deal with adversity.


Orthopaedic Proceedings
Vol. 98-B, Issue SUPP_10 | Pages 19 - 19
1 May 2016
Walker P Shneider S Meere P
Full Access

INTRODUCTION

Important surgical requirements for optimal function are accurate bone cut alignments and soft tissue balancing. From an unbalanced state, balancing can be achieved by Surgical Corrections including soft tissue releases, bone cut modifications, and changing tibial insert thickness. Surgical balancing can now be quantified using an instrumented tibial trial, but the procedures and results need further investigation. Our major purpose was to determine the initial balancing after making the bone cuts, and the final accuracy of balancing after Surgical Corrections. A related purpose was to determine the number and effectiveness of different Corrections in achieving balancing.

METHODS

During 101 surgeries of a PCL-retaining TKA, screen capture software recorded the video feed of surgery, angular data from the navigation system, and lateral and medial contact forces from the instrumented tibial trial. Initial bone cuts were made using navigation based on measured resection. The instrumented tibial trial measured the magnitudes and locations of the contact forces on the lateral and medial sides throughout flexion. The Heel Push Test (Walker 2014) determined the initial balancing, defined as a ratio of the medial/total force at 0, 30, 60 and 90 degrees flexion. A balanced knee with equal lateral and medial forces would show a value of 0.5. Surgical Corrections were then performed with the goal of achieving balancing. The most common Corrections were soft tissue releases (total 63 incidences), including MCL, postero-lateral corner, postero-medial corner; and increasing/decreasing tibial insert thicknesses (34 incidences).


Orthopaedic Proceedings
Vol. 99-B, Issue SUPP_22 | Pages 50 - 50
1 Dec 2017
Shahi A Boe R Oliashirazi S Salava J Oliashirazi A
Full Access

Aim

Persistent wound drainage has been recognized as one of the major risk factors of periprosthetic joint infection (PJI). Currently, there is no consensus on the management protocol for patients who develop wound drainage after total joint arthroplasty (TJA). The objective of our study was to describe a multimodal protocol for managing draining wounds after TJA and assess the outcomes.

Methods

We conducted a retrospective study of 4,873 primary TJAs performed between 2008 and 2015. Using an institutional database, patients with persistent wound drainage (>48 hours) were identified. A review of the medical records was then performed to confirm persistent drainage. Draining wounds were first managed by instituting local wound care measures. In patients that drainage persisted over 7 days, a superficial irrigation and debridement (I&D) was performed if the fascia was intact, and if the fascia was not intact modular parts were exchanged. TJAs that underwent subsequent I&D, revision surgery, or developed PJI within one year were identified.


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_22 | Pages 83 - 83
1 May 2013
Vince K
Full Access

“Expert opinion” is the lowest totem on the academic pole- and yet, “evidence based” medicine does not always provide us answers for the particular, the unusual clinical problem. Well-controlled studies are precisely that: “well controlled”. Life may be randomised, but falls short of being “well controlled”.

The challenge and honoufavourr of moderating a panel of experienced and articulate colleagues is to bring out “how they think” and how they formulate a plan for complex cases. The panel members are not only experienced practitioners, but they are the authors of studies that shape our profession. What are the limits to the studies they have published? What insight can they provide us to help understand “level 1” data more astutely? What biases and assumptions support their methods? Nothing achieves that with greater clarity than presentation of complex cases to an accomplished panel.

Several ordinary clinical problems are presented to establish current practice, followed by the unexpected outcomes to illustrate how experts deal with adversity.


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_34 | Pages 364 - 364
1 Dec 2013
Kallala R Nizam I Haddad F
Full Access

Introduction:

Periprosthetic joint infection (PJI) is a devastating diagnosis that carries a significant rate of associated mortality and places a large burden on health care systems. Treatment protocols often include combined intravenous antibiotics and staged revision surgery with locally-delivered antibiotics via PMMA cement spacers and/or beads. One disadvantage of PMMA is the need for later removal. Antibiotic releasing Calcium Sulphate beads (CaSO4) have had promising results in revision joint surgery and are absorbable, making later removal unnecessary. We report on use in a tertiary referral centre in the UK and present our initial findings.

Methods & Results:

CaSO4 beads containing 1 gram of Vancomycin and 240 mg of tobramycin per 10 cc was implanted in 12 patients between August 2012 and December 2012, all having undergone revision joint surgery for PJI. Of these patients; 7 were men and 5 women, mean age was 57 years (range 39–72) with a mean ASA grade of 2 (1–4). Indications were infected Total Hip Replacement (n = 7), infected Total Knee Replacement (n = 4) and infected metal on metal hip resurfacing (n = 1). Three procedures were emergencies, with the remainder being semi-elective procedures. One patient had single-stage revision THR. At latest follow up 10 patients had made a full recovery, with normal function and inflammatory markers. Two patients were awaiting a second stage revision procedure. Mean follow up was 2 months (1–4).


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_28 | Pages 54 - 54
1 Aug 2013
Breton D Leboucher J Burdin V Rémy-Néris O
Full Access

Introduction

The anterior cruciate ligament (ACL) is one of the most common ligament injuries. Several ACL reconstructions exist and are consequently performed. An accurate and comprehensive description of knee motion is essential for an adequate assessment of these surgeries, in terms of restoring knee motion.

Methods

We propose to compare these reconstructions thanks to an index of articular coherence. This index measures the instantaneous state surface configurations during a motion. More specifically, this refers to the position between two articular surfaces facing each other. First of all, the index has to refer to a position known to be physiological. This initial position of the bones, named reference, directly results from the segmentation of CT scans. First we compute all distances between the two surfaces and then we compute the Cumulative Distribution Function (CDF). We process this way for each iteration of the motion. Then we obtain a batch of CDF curves which provide us qualitative information relative to the motion such as potential collisions or dislocations. The graph of all CDF curves is called Figure of Articular Coherence (FoAC). A good articular coherence is characterised by CDF which are close to the reference. This qualitative method is coupled to a quantitative one named Index of Articular Coherence (IoAC) which computes the Haussdorff distance between the temporal distributions and the reference. This distance has to be as low as possible. The tools were tested on cadaveric experiments of ACL reconstruction provided by Hagemeister et al, (1999). They recorded the knee flexion/extension motion in following situations: the intact knee, after ACL resection, after three methods of ACL reconstruction on the same knee (‘over-the-top’ method (OTT), two different two tunnel reconstructions (2 tunnel). Our method was used, for the time being, for one specimen. We compare different post-surgery kinematics thanks to the FoAC and IoAC.


Orthopaedic Proceedings
Vol. 95-B, Issue SUPP_18 | Pages 11 - 11
1 Apr 2013
Godden A Kassam A Cove R
Full Access

Literature has suggested that obese (BMI >30) and morbidly obese (BMI > 35) patients should not be offered surgery as a day case due to increases in complication and readmission rates. At Torbay hospital, patients are routinely offered day case surgery, in a specialist day case unit, regardless of BMI. This is done with minimal complications and enables a higher throughput of patients and at least 75% of surgical procedures to be performed as a day case, as per NHS guidelines.

We present 12 year data of day case knee arthroscopy surgery performed at Torbay hospital. Over 12 years, 3421 knee arthroscopies were performed. 649 were performed on obese patients and 222 on morbidly obese patients. No anaesthetic complications were observed in any of the obese patient groups and readmissions rates (up to 28 days) were 0.8% in the morbidly obese group and 0.9% in the Obese group, compared to 0.9% for patients with BMI <30.

Our data shows that day case surgery can be performed on all patients regardless of BMI and patient obesity. We believe that other units should offer surgery to obese and morbidly obese patients to allow increased efficiency and achievement of NHS day case guidelines.


Orthopaedic Proceedings
Vol. 104-B, Issue SUPP_12 | Pages 106 - 106
1 Dec 2022
Zwiebel X Pelet S Corriveau-Durand S
Full Access

Reported wound complication in below knee surgery can be quite high. Recent study demonstrated that increased blood loss and hematoma formation increase wound complications especially in foot and ankle surgeries. Despite the evidence on the benefit of TXA on blood loss in TKA and THA it is not routinely used by surgeon in below knee surgery. To assess the efficacy and safety of this medication in reducing wound complication and blood loss and the risk of thromboembolic complications in patients undergoing below knee surgery. A systematic literature search of PubMed, Embase, Ovid, the Cochrane Library and AAOS and AOFAS conference proceedings was conducted. The primary outcome was the rate of wound complications. Data were analyzed using the Review Manager 5.3 software. Nine studies involving 861 patients met the inclusion criteria. The meta-analysis indicated that TXA, when compared to a control group, reduced wound complications (OR, 0.54; 95% IC, 0.31 to 0.95, p = 0,03), blood loss (MD = −149,4 ml; 95% CI, −205,3ml to −93,6ml), post-operative drainage (MD = −169,8 ml; 95% CI, −176,7 to −162,9 ml) and hemoglobin drop (MD = −8,75 g/dL; 95% IC, −9,6 g/dL to −7,8 g/dL). There was no significant difference in thromboembolic events (RR 0,53; 95% CI, 0,15 - 1,90; p = 0,33). This study demonstrated that TXA could be use in below knee surgery to reduce wound complication and blood loss without increased thromboembolic complications. The small number of studies limit the findings interpretation. Further studies are needed to sustain those resutls