- Nerve involved
- Ulnar nerve at the elbow
- Symptoms
- Ring and little finger numbness
- First-line
- Night splinting, activity modification
- Surgical option
- Cubital tunnel release (with selective transposition)
What cubital tunnel syndrome is.
The ulnar nerve runs along the inside of the elbow through a narrow channel called the cubital tunnel, just behind the medial epicondyle (the bony bump on the inside of the elbow). In cubital tunnel syndrome, the nerve is compressed and irritated at this point — most often as a result of prolonged elbow flexion, direct pressure, or local soft-tissue thickening.
Symptoms.
The classical features are numbness and tingling in the ring and little finger, often worse at night and worse with the elbow flexed (resting your head on your hand, sleeping with the arm bent, holding a phone for a long call). As the condition progresses, patients develop weakness of grip and pinch, clumsiness, and (in advanced cases) muscle wasting of the small intrinsic hand muscles.
How the diagnosis is made.
Examination identifies a positive Tinel's sign at the cubital tunnel (tapping over the nerve reproduces the symptoms), a positive elbow-flexion test (sustained flexion reproduces symptoms within a minute), and weakness of intrinsic muscles in advanced cases. Nerve conduction studies confirm the diagnosis and localise the compression to the elbow.
Treatment.
- Night splinting in extension — preventing prolonged elbow flexion during sleep is the highest-yield first step. A simple soft splint or foam wrap is sufficient.
- Activity modification — avoiding direct pressure on the elbow; reducing prolonged elbow flexion at the desk and on the phone.
- Physiotherapy — ulnar nerve glides; selective.
- Surgical decompression — recommended where conservative treatment fails, where weakness develops, or where nerve conduction studies show significant compression. The contemporary operation is an in-situ cubital tunnel release, with anterior transposition reserved for selected cases.
Mild and early cases recover well with conservative treatment. Established weakness and muscle wasting recover incompletely; surgical decompression is therefore offered before weakness sets in.
Frequently asked questions.
Will my numbness go away on its own?
Mild, intermittent numbness often improves with night splinting and activity modification. Persistent numbness or any weakness is an indication for further evaluation, including nerve conduction studies.
Does surgery always work?
Surgical decompression reliably relieves the night-time symptoms and progressive numbness in the majority of patients. Established muscle weakness and wasting often recover incompletely — which is why we operate before the nerve has been damaged that far.
What's the recovery from cubital tunnel release?
A sling for comfort for 3–5 days. Return to a desk job within a week. Heavy work at 4–6 weeks. Nerve recovery (improvement in numbness) occurs over 3–6 months.
Will I need the nerve moved?
Most patients are treated by simple in-situ decompression. Anterior transposition (moving the nerve in front of the elbow) is reserved for selected cases — typically where there's a bony deformity or instability of the nerve.
References.
- Mowlavi A, et al. The management of cubital tunnel syndrome: a meta-analysis of clinical studies. Plast Reconstr Surg. 2000;106(2):327–334.
- Bartels RHMA, et al. Surgical management of ulnar nerve compression at the elbow: an analysis of the literature. J Neurosurg. 1998;89(5):722–727.