First up in this month’s MSKMag is a reprint of the wonderful Val Jones’ excellent article from earlier this year. We are re-publishing this as open access to bring further attention to her work and to help raise funds for an important campaign to get Val back home with her family.
Val Jones is a Physiotherapist and educator specialising in elbow pain and pathology who we have had the pleasure of working with for many years. Unfortunately she was in a serious accident earlier this year which has resulted in her being paralysed due to a high spinal cord lesion. She is currently working on the ability to talk and eat again but will require full time ventilation in order to live at home with her family; which is her goal.
Her family are raising money via the GoFundMe links below therefore please give generously to support one of our own who has been so generous to the MSK community for so long. For those who may not be aware of Val and her work, we have made a bundle of the podcasts, articles and webinars she has made with us over the years which we will make available to anyone who donates via the bundle link below. In our first round of this earlier in the month we were able to raise £3500 and I would love to make that £5000 through this push.
Val’s influence on Physio Matters has been more profound than she would realise or admit. She has a rare talent for both academic writing and lay knowledge translation that helps bridge the gap between the sometimes jargon-laden world of empirical science and the practical realities of the clinical front line. On a personal level she has been a role model by charting a career in which she takes the subject matter seriously but retains humour and humility in not taking herself too seriously. Finally, alongside so many of our contributors and educators, she gives her time and energy so generously to our shared cause of raising MSK care standards for the patients we serve.
Thank you Val and whilst it is the very least we can do, I hope this promotion of your work can attract the funds you so deserve for your ongoing care.
Working in a Regional Trauma Centre, we’re used to seeing lots of soft tissue injuries on a regular basis. But the one that was considered more unusual when I first started working at the Shoulder & Elbow Unit in Sheffield over 20 years ago was the acute distal biceps rupture. Previous literature both on UK and US populations describe it as a rare injury, with an incidence of 1.2 to 2.6 per 100,000 person years [1,2]. This equated to seeing and operating upon between 10 and 12 patients per annum for the Sheffield population of approximately 750,000 during the first few years of the millennium.
However, in the last decade there has been an explosion, quite literally, in the number of patients attending our unit with a distal biceps rupture. Our team now on average sees up to 40 cases per year - over a 300% increase - over a 20 year period. These figures made me question what was driving this increase and was this just a regional trend, or something that other orthopaedic units were seeing? Also, what are the implications for an already struggling healthcare system to cope with an increased demand for surgery, imaging, resources, and post-operative rehabilitation?
Trawling through recent literature there is very little written on the incidence of these injuries, apart from one study looking at Swedish and Finnish registries [3], which found a 6- to 7-fold increase in this type of injury and a 28-fold increase in distal biceps repair surgery. Staggering numbers with a huge implication for resource allocation, with figures that echoed our own experience in Sheffield.
In the general population, full thickness tears are most encountered in active middle-aged men between 40 and 60 years of age [1,2]. Often when questioned, these patients have had no warning signs before their tendon tear. The incidence in women is extremely low and clinically I’ve only met one female with this injury during my 23 year tenure in Sheffield. An evaluation of distal biceps tendon ruptures in women sees them describe a more gradual onset of symptoms and a higher incidence of partial tears[4], rather than full thickness ones.
Other predisposing factors to injury may include an elevated body mass index (BMI), smoking and medication use [5]. Elevated BMI, possibly secondary to greater muscle mass, would increase the load on the tendon and may predispose to rupture. Furthermore, obesity has been shown to decrease immune responses to acute tendon injury [6]. Of patients with a distal biceps tendon rupture, 36–66% are reported to be obese [1,2], compared with the general UK population obesity rate which is approximately 30% [7].
The exact incidence of smoking in patients with distal biceps tendon ruptures is unknown, but it is widely accepted that smoking is a predisposing factor in tendon injuries. One study quotes a 7-fold increase in distal biceps ruptures in smokers compared with non-smokers [1]. Smoking rates have increased in the adult population of those aged 45 and above [8], which is the peak age for these injuries to occur. A possible effect of smoking involves an increased zone of hypovascularity in the tendon between the proximal and distal blood supply [9]. Patients often ask if vaping carries the same risk as cigarette smoking but I have to be honest and tell patients that I just don’t have the answer currently. Maybe the correlation between musculoskeletal injury risk and vaping will become more evident over time…
The image and performance enhancement drug (IPED) market, including anabolic steroids, has become increasingly accessible through online sellers [10], which has broadened their appeal to a wider market. Their usage has become semi-normalised and socially acceptable, coining the term ‘gym and tonic’. Weightlifters are the primary user group of IPEDs, with an increase in usage seen in both males and females.
Anabolic steroid use combined with exercise may lead to dysplasia of collagen fibrils, which can decrease the tensile strength of the tendon, with an associated increase in muscle strength [11]. Changes in tendons’ crimp morphology have been shown to occur as well, which again may alter the tensile strength of the tendon [11]. Less commonly, tendon rupture can also be linked with statin and fluoroquinolone antibiotic use [12,13].
High risk sports for distal biceps tendon ruptures are weightlifting, American football, judo and other contact sports [1,14] and usually occur when an eccentric force is applied to a flexed and supinated elbow [15] with most patients describing an audible ‘pop’, followed by pain and weakness. Not all are sporting injuries though. In Sheffield, we’ve seen it in patients who’ve tried to stop their dog running off by hanging onto their collar or by trying to catch a wardrobe falling down the stairs. That was never going to work out well.
After discussion with the surgical team, most medically well patients opt for an acute repair. An acute repair is deemed less risky for patients with less chance of post-operative complications [16]. However, one note of caution is there is a lack of clinical consensus on the role of operative treatment, Support for surgery has largely been driven by biomechanical studies that report a reduction in supination and elbow flexion strength, as well as impaired endurance seen in injuries managed non-operatively [14,17]. There is a lack of robust evidence comparing non-operative versus operative treatment. Public perception towards surgical treatment is often positive, although the evidence of its superiority over other treatments is lacking. When considering surgery, there is often a disregard for the associated risks, with individuals often taking a ‘it will never happen to me’ stance. But distal biceps repairs carry a huge 25% complication rate, with 1 in 20 patients suffering a serious adverse event such as vascular or nerve injury, heterotopic ossification or re-rupture [16].
Given the real risks involved with surgery, what’s driving the increase in this procedure? Firstly, the recognition of the injury and the accuracy of diagnosis by healthcare professionals may have improved. Physical examination techniques such as the commonly used Hook test [18], combined with a careful history, makes swifter diagnosis more likely. Historically, patients with a delayed presentation were often advised against surgery as delayed repairs are associated with higher complication rates. So faster diagnosis probably leads to an increase in surgical conversion rates.
The availability of modern imaging technology, such as MRI and ultrasound scans, may have made confirming the diagnosis easier, and again will decrease any delay between injury and diagnosis, once again leading to an increased possibility of surgery.
Other reasons may be that with increasing sporting participation and more active older populations, the incidence and age at presentation of this injury would be expected to rise. This group of patients may be more interested in full recovery and therefore surgical options are more likely to be explored, as patients are unwilling to live with a lifelong strength deficit and cosmetic deformity seen following conservative management.
Recent advances in surgical techniques such as the use of ‘button’ techniques, allow for strong initial fixation which allows early active mobilisation [19]; music to most physios’ ears. There is little consensus on the optimal post-op rehabilitation programme but our own in-house experience of immediate active post-op mobilisation resulted in a faster return to function with less physiotherapy intervention, compared to delayed mobilisation. There was no increase in complication rates, such as re-rupture, following accelerated mobilisation. Loading above 10kg is avoided for 3 months post-op because of the pull-out strain of the button devices used, but otherwise there are no other restrictions placed on our patients.
In conclusion, distal biceps ruptures are becoming increasingly prevalent for a variety of reasons. Healthcare practitioners should remain vigilant in diagnosing the injury, and swiftly refer on for an urgent surgical opinion. Despite the lack of robust evidence, surgery in the medically well is considered the current optimal treatment approach, with early mobilisation following surgery appearing to be beneficial, both in terms of speed of recovery and use of physiotherapy resources.
References
* Safran MR, Graham SM. Distal biceps tendon ruptures: incidence, demographics, and the effect of smoking. Clinical Orthopaedics and Related Research®. 2002 Nov 1;404:275-83.
* Kelly MP, Perkinson SG, Ablove RH, Tueting JL. Distal biceps tendon ruptures: an epidemiological analysis using a large population database. The American journal of sports medicine. 2015 Aug;43(8):2012-7.
* Launonen AP, Huttunen TT, Lepola V, Niemi ST, Kannus P, Felländer-Tsai L, Berg HE, Laitinen MK, Mattila VM. Distal biceps tendon rupture surgery: changing incidence in Finnish and Swedish men between 1997 and 2016. The Journal of hand surgery. 2020 Nov 1;45(11):1022-8.
* Jockel CR, Mulieri PJ, Belsky MR, Leslie BM. Distal biceps tendon tears in women. Journal of shoulder and elbow surgery. 2010 Jul 1;19(5):645-50.
* Caekebeke P, Duerinckx J, van Riet R. Acute complete and partial distal biceps tendon ruptures: what have we learned? A review. EFORT open reviews. 2021 Oct 19;6(10):956-65.
* Del Buono A, Battery L, Denaro V, Maccauro G, Maffulli N. Tendinopathy and inflammation: some truths. International journal of immunopathology and pharmacology. 2011 Jan;24(1_suppl2):45-50.
* Haase CL, Eriksen KT, Lopes S, Satylganova A, Schnecke V, McEwan P. Body mass index and risk of obesity‐related conditions in a cohort of 2.9 million people: Evidence from a UK primary care database. Obesity science & practice. 2021 Apr;7(2):137-47.
* Tattan-Birch H, Brown J, Shahab L, Beard E, Jackson SE. Trends in vaping and smoking following the rise of disposable e-cigarettes: a repeat cross-sectional study in England between 2016 and 2023. The Lancet Regional Health–Europe. 2024 May 23.
* Seiler III JG, Parker LM, Chamberland PD, Sherbourne GM, Carpenter WA. The distal biceps tendon: two potential mechanisms involved in its rupture: arterial supply and mechanical impingement. Journal of shoulder and elbow surgery. 1995 May 1;4(3):149-56.
* Brennan R, Wells JS, Van Hout MC. The injecting use of image and performance‐enhancing drugs (IPED) in the general population: A systematic review. Health & social care in the community. 2017 Sep;25(5):1459-531.
* Laseter JT, Russell JA. Anabolic steroid-induced tendon pathology: a review of the literature. Medicine and science in sports and exercise. 1991 Jan 1;23(1):1-3.
* Deren ME, Klinge SA, Mukand NH, Mukand JA. Tendinopathy and tendon rupture associated with statins. JBJS reviews. 2016 May 3;4(5):e4.
* Stephenson AL, Wu W, Cortes D, Rochon PA. Tendon injury and fluoroquinolone use: a systematic review. Drug safety. 2013 Sep;36:709-21.
* Morrey BF, Askew LJ, An KN, Dobyns JH. Rupture of the distal tendon of the biceps brachii. A biomechanical study. JBJS. 1985 Mar 1;67(3):418-21.
* Lappen S, Siebenlist S, Kadantsev P, Hinz M, Seilern und Aspang J, Lutz PM, Imhoff AB, Geyer S. Distal biceps tendon ruptures occur with the almost extended elbow and supinated forearm–an online video analytic study. BMC Musculoskeletal Disorders. 2022 Jun 22;23(1):599.
* Amarasooriya M, Bain GI, Roper T, Bryant K, Iqbal K, Phadnis J. Complications after distal biceps tendon repair: a systematic review. The American journal of sports medicine. 2020 Oct;48(12):3103-11.
* Freeman CR, McCormick KR, Mahoney D, Baratz M, Lubahn JD. Nonoperative treatment of distal biceps tendon ruptures compared with a historical control group. JBJS. 2009 Oct 1;91(10):2329-34.
* O'Driscoll SW, Goncalves LB, Dietz P. The hook test for distal biceps tendon avulsion. The American journal of sports medicine. 2007 Nov;35(11):1865-9.
* Barret H, Winter M, Gastaud O, Saliken DJ, Gauci MO, Bronsard N. Double incision repair technique with immediate mobilization for acute distal biceps tendon ruptures provides good results after 2 years in active patients. Orthopaedics & Traumatology: Surgery & Research. 2019 Apr 1;105(2):323-8.
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