Evidence map›Paper›PMID 30828192›Full record

ArticleJournal of clinical orthopaedics and trauma

Cadaveric study of the infrapatellar branch of the saphenous nerve: Can damage be prevented in total knee arthroplasty?

Sung R Lee, Nicholas J P Dahlgren, Jackson R Staggers, Cesar de Cesar Netto, Amit Agarwal, Ashish Shah, Sameer Naranje

Abstract read
In one paragraph

Article in Journal of clinical orthopaedics and trauma. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

12 citing papers in PubMed.

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  4. [Comparison of effectiveness between infrapatellar and semi-extended parapatellar approaches for intramedullary nailing in treatment of type A tibial shaft fractures].Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors.

Sung R LeeSchool of Medicine, University of Alabama at Birmingham, 1670 University Blvd, Birmingham, AL 35233, USA.
Nicholas J P DahlgrenSchool of Medicine, University of Alabama at Birmingham, 1670 University Blvd, Birmingham, AL 35233, USA.
Jackson R StaggersSchool of Medicine, University of Alabama at Birmingham, 1670 University Blvd, Birmingham, AL 35233, USA.
Cesar de Cesar NettoDepartment of Orthopaedic Surgery, University of Alabama at Birmingham, 1313 13th Street S., Birmingham, AL 35205, USA.
Amit AgarwalInstitutes of Orthopaedics, Indraprastha Apollo Hospitals, Sarita Vihar, Delhi Mathura Road, New Delhi 110076, India.
Ashish ShahDepartment of Orthopaedic Surgery, University of Alabama at Birmingham, 1313 13th Street S., Birmingham, AL 35205, USA.
Sameer NaranjeDepartment of Orthopaedic Surgery, University of Alabama at Birmingham, 1313 13th Street S., Birmingham, AL 35205, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe infrapatellar branch of the saphenous nerve (IPBSN) is a purely sensory nerve innervating the anteromedial aspect of the knee and anteroinferior knee joint capsule. Total knee arthroplasty (TKA) is commonly used to treat end-stage arthritis, but the IPBSN is often injured and results in numbness around the anteromedial knee. The aim of this cadaveric study was to describe the course and variability of the IPBSN and to assess whether it is possible to preserve during a standard midline surgical approach in TKA.

methodsTen fresh-frozen cadaver legs were dissected using a midline approach to the knee. Skin and subcutaneous flap were reflected to expose both the saphenous nerve and its branches. The branches of the IPBSN were identified, and their vertical distances above the tibial tuberosity (TB) were recorded: TB to inferior branch, to middle branch, and to superior branch.

resultsThere were 10 left-sided specimens (6 female, 4 male) with a mean age of 79.9 ± 9.8 years. 8 (80%) specimens had 2 branches of IPBSN while 2 (20%) specimens had 3 branches. The average distance from TB to the inferior branch was 16.8 ± 8.3 mm (3.0-28.0); middle branch, 24.0 ± 1.4 mm (23.0-24.9); and superior, 45.9 ± 7.7 mm (32.0-54.5).

conclusionOur cadaveric study found no consistent way to preserve the IPBSN using a standard midline approach in TKA. It is important to provide proper patient education on this complication, and surgeons should be aware of approximate locations and variations of IPBSN while performing other knee procedures.

Indexed as

Cadaver studyInfrapatellar branchNerve injuryParesthesia numbnessSaphenous nerveTotal knee arthroplasty

Identifiers

PMID30828192
PMCPMC6383043

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.