Endoscopic fasciotomy for chronic exertional compartment syndrome of the forearm: Clinical results of a new technique using an endoscopic carpal tunnel release device

Single incision, minimally invasive fasciotomy of the anterior and lateral leg compartments with decompression of the superficial peroneal nerve

BACKGROUND

There is a considerable overlap of symptoms between chronic exertional compartment syndrome (CECS) of the anterior and lateral compartments of the lower leg and entrapment neuropathy of the superficial peroneal nerve (SPN). We describe a minimally invasive, single incision surgical technique for release of both the compartments and the SPN in the same setting. The operative technique involves a minimal anterolateral approach at the level where the SPN pierces the subcutaneous fascia.

METHODS

Nineteen patients were operated with the method and 24 anterolateral compartments (5 cases with bilateral CECS) were released. Anterior and lateral, proximal and distal fasciotomies were performed sequentially with the use of a specific instrument designed for carpal tunnel release (KnifeLight®, Stryker). This is a modification of a fasciotome with an intergrated light source which allows for transillumination of the subcutaneous tissues. The SPN and its main branches with their anatomical variations were explored and decompressed at the same setting.

RESULTS

Patients who met the inclusion criteria were reviewed at one year postoperatively with a Numeric Analog Pain Scale (NAS) and the Linkert satisfaction scale. There were 5 men and 10 women, aged 35.7 (21-60) years. The NAS scores improved by a mean 6 points (p<0.0001) postoperatively and 86.6% (13/15) of the patients were either satisfied or very satisfied with the operation. There were no intraoperative complications. There were two patients with SPN neuropathy symptoms postoperatively, one of whom required revision surgery. One patient had recurrence of less intense symptoms in the first postoperative year with no need for reoperation.

CONCLUSIONS

The simultaneous release of the anterolateral compartment of the leg and decompression of the SPN with the described technique was safe and effective. It combined the advantages of a single, minimally invasive approach with the subcutaneous transillumination, and had a high patient satisfaction and a low recurrence rate.

LEVEL OF EVIDENCE

Retrospective case series, Level IV.

Ultrasound Imaging of Brachial and Antebrachial Fasciae

Knowledge about fasciae has become increasingly relevant in connection to regional anesthesiology, given the growing interest in fascial plane, interfascial, and nerve blocks. Ultrasound (US) imaging, thanks to high definition, provides the possibility to visualize and measure their thickness. The purpose of this study was to measure and compare, by US imaging, the thickness of deep/muscular fasciae in different points of the arm and forearm. An observational study has been performed using US imaging to measure brachial and antebrachial fasciae thickness at anterior and posterior regions, respectively, of the arm and forearm at different levels with a new protocol in a sample of 25 healthy volunteers. Results of fascial thickness revealed statistically significant differences (p < 0.0001) in the brachial fascia between the anterior and the posterior regions; in terms of the antebrachial fascia, no statistically significant difference was present (p > 0.05) between the regions/levels. Moreover, regarding the posterior region/levels, the brachial fascia had a greater thickness (mean 0.81 ± 0.20 mm) than the antebrachial fascia (mean 0.71 ± 0.20 mm); regarding the anterior region/levels, the antebrachial fascia was thicker (mean 0.70 ± 0.2 mm) than the brachial fascia (mean 0.61 ± 0.11 mm). In addition, the intra-rater reliability reported good reliability (ICC_2,k: 0.88). US imaging helps to improve grading of fascial dysfunction or disease by revealing subclinical lesions, clinically invisible fascial changes, and one of the US parameters to reliably evaluate is the thickness in the different regions and levels.

Endoscopic fasciotomy for chronic exertional compartment syndrome of the forearm: Systematic review of outcomes and complications

BACKGROUND

Endoscopic fasciotomy of the forearm for chronic exertional compartment syndrome (CECS) has gained popularity recently.

AIM

To systematically review the literature of endoscopic fasciotomy for CECS of the forearm, aiming to assess the outcomes and complications of the different endoscopic fasciotomy techniques described in the literature.

METHODS

On January 18, 2021, PubMed and EMBASE were searched by 3 reviewers independently, and all relevant studies published up to that date were considered based on predetermined inclusion/exclusion criteria. The subject headings “endoscopic fasciotomy” and “compartment syndrome” and their related key terms were used. The Preferred Reporting Item for Systematic Reviews and Meta-Analyses statement was used to screen the articles.

RESULTS

A total of seven studies including 183 patients (355 forearms) were included. The mean age of the patients was 31.2 years (range: 15-42 years). The postoperative follow-up duration ranged from 6 wk to 4.9 years. All patients were able to return to sport activities between postoperative weeks 1 to 8. Recurrence of the compartment syndrome occurred in three patients, giving a rate of 1.6% per patient and 0.8% per forearm. The overall complication rate was 8.7% per patient, and 4.5% per forearm. The most common reported complication was hematoma (7 forearms; 2.0%).

CONCLUSION

Endoscopic fasciotomy for CECS of the forearm has favorable short- and mid-term outcomes with very low recurrence and complication rates. This, however, needs to be confirmed in larger, long-term follow-up, prospective, comparative studies between open, mini-open and endoscopic fasciotomy techniques.

Compartments of the antebrachial fascia of the forearm: clinically relevant ultrasound, anatomical and histological findings

PURPOSE

Acute compartment syndrome is defined as a limb-threatening condition caused by bleeding or oedema in a closed muscle compartment surrounded by fascia or bone. It is most commonly encountered in the forearm, which has three compartments: posterior, anterior and lateral. These are surrounded and closed in by the antebrachial fascia, formed by dense connective tissue that facilities their study on ultrasound and is key to fasciotomy treatment. The purpose of this study was to broaden existing ultrasound, anatomical and histological knowledge of the fascia of the forearm to facilitate their identification on ultrasound, with possible clinical and therapeutic applications.

METHODS

The study was performed in 50 cryopreserved upper limbs from adult cadavers from the dissection room of the Faculty of Medicine and Health Sciences. They were examined on ultrasound and subsequent anatomical dissection and microscopy to study the fascia and its relationship with different muscles of the forearm compartments.

RESULTS

Distinct anatomical relationships were observed on ultrasound and dissection between the fascia and the extensor carpi ulnaris, extensor digiti minimi, and anconeus muscle in the posterior compartment, and the flexor carpi radialis and flexor carpi ulnaris in the anterior compartment. They were isolated by the antebrachial fascia and had distinct relationships with the neurovascular structures.

CONCLUSION

These results demonstrate that high-definition ultrasound enables us to locate the antebrachial fascia and particular muscles with a distinct relationship with neurovascular structures. This helps better identify these structures, facilitating diagnosis of any pathology in the area, with potential therapeutic and clinical applications.

Chronic exertional compartment syndrome of the forearm: a systematic review

The aim of this systematic review is to understand which surgical procedure provides better results in terms of pain relief and function in the treatment of chronic exertional compartment syndrome (CECS) of the forearm.

We searched Medline (PubMed), Web of Science, Embase and Scopus databases on 8 July 2020. Twelve studies were included in this review.

We assessed the quality of the studies using the Coleman Methodological Score.

Data on demographic features, operative readings, diagnostic methods, follow-up periods, type and rates of complications, survivorship of the procedure, return to sport activity, and outcome measures were recorded.

In conclusion, compared to the other techniques, endoscopic fasciotomy delivers similar success rates and lower incidence of complications.

Cite this article: EFORT Open Rev 2021;6:101-106. DOI: 10.1302/2058-5241.6.200107