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  • Title: Management of posterior interosseous nerve (PIN) palsies after distal biceps tendon repair using a single incision technique- a conclusive approach to diagnostics and therapy.
    Author: Besmens IS, Guidi M, Schiller A, Jann D, Giovanoli P, Calcagni M.
    Journal: J Plast Surg Hand Surg; 2021 Aug; 55(4):226-231. PubMed ID: 33586601.
    Abstract:
    Complete distal ruptures of the biceps brachii tendon are rather rare and surgical reinsertion is the gold standard. Recently, one incision approaches for the refixation of the distal biceps tendon have been popularized with the introduction of a single-incision approach employing a trans-radial cortical button fixation. Since the introduction of this fixation technique we have seen more iatrogenic lesions to the posterior interosseous nerve (PIN) after not having seen any PIN lesions with 2 incision biceps refixation techniques over the last 5 years. Several patients with iatrogenic PIN affections after one incision refixation techniques of the distal biceps tendon were referred to our level 1 department of Plastic surgery and hand surgery from different orthopedic surgeons. Over the course of 6 months we saw 5 patients with a similar history. We decided to analyze this problem and propose a course of action to regain function of the PIN innervated muscles as good and fast as possible. If there is a loss of function in the PIN innervated muscles after distal biceps refixation a neurological evaluation including electrophysiology needs to be conducted. An ultrasound assessment of the nerve itself should guide the clinician in the decision between a conservative and a surgical treatment in the early postoperative phase. If surgical exploration is warranted intraoperative neurography should be the basis on which ground (partial) grafting or solely neurolysis is performed. Postoperatively all patients need to follow a rehabilitation protocol to help with nerve regeneration and regaining of motor function.
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