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Surgical Outcomes After Minimally Invasive Foraminotomy for C8 Radiculopathies With Motor Deficits: A

Yasmeen Elsawaf¹, Saud K Zaidan², Stephanie K Liu³

¹Department of Neurosurgery, Oregon Health and Science University, Portland, Oregon, USA.

Operative Neurosurgery (Hagerstown, Md.)

|June 4, 2026

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Hand-grip dynamometry effectively measures recovery after C8 radiculopathy surgery. This objective tool shows significant grip strength improvement post-minimally invasive C8 foraminotomy, aiding patient counseling and outcome assessment.

Area of Science:

Neurosurgery
Orthopedics
Rehabilitation Medicine

Background:

C8 radiculopathy with motor deficits poses diagnostic and prognostic challenges.
Traditional manual muscle testing may lack sensitivity for detecting subtle postoperative improvements.
Evaluating objective measures for assessing recovery is crucial.

Purpose of the Study:

To evaluate the utility of hand-grip dynamometry in detecting postoperative recovery.
To assess grip strength changes after minimally invasive C8 foraminotomy.
To determine if dynamometry can provide objective outcome assessment.

Main Methods:

Retrospective review of 48 patients with unilateral C8 radiculopathy and motor deficits.
Grip strength measured using Jamar dynamometers pre- and post-surgery.

Keywords:

C8 nerve root Cervical radiculopathy Dynamometry Electromyography Foraminotomy Grip strength Motor recovery

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Improvement defined as ≥5 lbs increase; normal grip defined as within 10 lbs of contralateral hand or ≥100 lbs.

Main Results:

Mean grip strength increased significantly from 53.9 lbs preoperatively to 67.1 lbs postoperatively (P < .001).
70.8% of patients showed improvement, with 55.9% achieving normal grip strength.
No surgical complications were reported; comorbidities and EMG findings did not predict outcomes.

Conclusions:

Hand-grip dynamometry demonstrates significant grip strength improvement after minimally invasive C8 foraminotomy.
Over half of improved patients achieved normal grip strength, indicating functional recovery.
Dynamometry offers an objective, practical bedside measure for C8 radiculopathy outcome assessment.