Scientific article
Corticosteroid Injection With or Without Thumb Spica Cast for de Quervain Tenosynovitis

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Purpose

To compare the corticosteroid injection (CSI) with or without thumb spica cast (TSC) for de Quervain tendinitis.

Methods

In this prospective trial, 67 eligible patients with de Quervain tenosynovitis were randomly assigned into CSI + TSC (33 cases) and CSI (34 cases) groups. All patients received 40 mg of methylprednisolone acetate with 1 cc lidocaine 2% in the first dorsal compartment at the area of maximal point tenderness. The primary outcome was the treatment success rate, and the secondary outcome was the scale and quality of the treatment method using Quick Disabilities of Arm, Shoulder and Hand and visual analog scale scores.

Results

The groups had no differences in mean age, sex, and occupation. The visual analog scale and Quick Disabilities of the Arm, Shoulder and Hand scores were similar in both groups before the treatment. The treatment success rate was 93% in the CSI + TSC group and 69% in the CSI group. Although both methods improved the patients' conditions significantly in terms of relieving pain and functional ability, CSI + TSC had a significantly higher treatment success rate.

Conclusions

The combined technique of corticosteroid injection and thumb spica casting was better than injection alone in the treatment of de Quervain tenosynovitis in terms of treatment success and functional outcomes.

Type of study/level of evidence

Therapeutic II.

Section snippets

Methods

Following the approval of the vice chancellor of research and ethic committee of the Guilan University of Medical Sciences and Health Services and registration of the study on the Registry of Clinical Trials, we conducted this study on patients with de Quervain tenosynovitis. The criteria for inclusion in the study were pain on the radial side of the wrist, tenderness at the first dorsal compartment, a positive Finkelstein test, and a pain score greater than 6. The patients who were younger

Results

Both groups were similar with regards to demographic characteristics, dominant hand, affected hand, and occupation status (Table 1). Two patients from the CSI + TSC group (1 died due to unrelated causes and 1 moved to another city) and 1 patient from the CSI group (had a motor vehicle accident) were lost to follow-up before the 3-week post-treatment visit. One patient in the CSI + TSC group and 4 in the CSI group were excluded from the rest of the study because they took analgesics. The

Discussion

The results of this study indicated that the CSI + TSC treatment method was superior to CSI alone with regards to success rate and functional outcomes. The CSI + TSC method was successful in 93% of the patients whereas CSI was successful in 69%. Weiss and colleagues20 in a prospective study of 93 de Quervain patients, examined the efficacy of the use of CSI, a prefabricated thumb spica orthosis, and simultaneous CSI + thumb spica orthosis methods. They found that the treatment success rate was

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