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Updated: Dec 31, 2025

Clinical Application of Microscope-Assisted Minimally Invasive Anterior Lumbar Interbody Fusion

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Published on: June 16, 2023

Do Surgical Site Infection Rates Differ Among Microscope-assisted Versus Loupe-assisted Lumbar Discectomies?

Adan Omar¹, Scott Ecternacht, Etka Kurucan

¹Department of Orthopaedic Surgery, University of Rochester School of Medicine, Rochester, NY.

Clinical Spine Surgery

|January 10, 2020

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This study found no significant difference in surgical site infection rates between microscopic assistance (MA) and loupe assistance (LA) for lumbar discectomy. Both methods are safe for spinal decompression procedures, with similar outcomes regarding infection risk.

Area of Science:

Neurosurgery
Spinal Surgery
Infectious Disease Control

Background:

Lumbar decompression for herniated discs and stenosis are common.
Concerns exist regarding potential increased surgical site infection (SSI) risk with operative microscopes due to drape contamination.
This study addresses the hypothesis that operative microscopes do not elevate infection rates in lumbar decompression.

Purpose of the Study:

To compare surgical site infection (SSI) rates in patients undergoing lumbar discectomy using an operative microscope versus surgical loupes.
To evaluate the safety and efficacy of microscopic assistance (MA) versus loupe assistance (LA) in lumbar decompression procedures.

Main Methods:

A retrospective cohort analysis of 225 patients undergoing lumbar spinal decompression.

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Patients were divided into two groups: microscopic assistance (MA) and loupe assistance (LA).

Data collected included patient demographics, surgical details, and postoperative SSIs within 30 days.

Main Results:

No significant difference in SSI rates between MA (3.7%) and LA (7.9%) groups (P=0.14).
The MA group had significantly longer operative times (92 vs. 50 minutes, P<0.001) and higher body mass index.
Dural tear rates were similar between groups (3.1% MA vs. 1.6% LA, P=0.3).

Conclusions:

Operative microscope use in lumbar decompression yields comparable infection rates to loupe assistance.
Microscopic assistance may offer educational benefits for trainees in academic settings.
Both MA and LA are viable and safe options for lumbar decompression surgery regarding infection risk.