Evidence map›Paper›PMID 27518727›Full record

ArticleJournal of anesthesia2016

A nomogram for predicting the need for sciatic nerve block after total knee arthroplasty.

Rovnat Babazade, Thilak Sreenivasalu, Pankaj Jain, Matthew T Hutcherson, Amanda J Naylor, Jing You, Hesham Elsharkawy, Ali Sakr Esa Wael, Alparslan Turan

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Article in Journal of anesthesia, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.

0numbers the graph read from it
0cells of the map it votes in
2citing papers in PubMed
1.3field-weighted citation impact, top 19% of its field
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

2 citing papers in PubMed, 9 citations in OpenAlex.

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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

9 authors at 4 institutions in 1 country.

Rovnat BabazadeDepartment of Anesthesiology, University of Texas Medical Branch, Galveston, TX, USA.
Thilak SreenivasaluOutcomes Research Consortium, Cleveland, OH, USA.
Pankaj JainDepartment of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, OH, USA.
Matthew T HutchersonDepartment of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, OH, USA.
Amanda J NaylorDepartment of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, OH, USA.
Jing YouDepartment of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, OH, USA.
Hesham ElsharkawyDepartment of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, OH, USA.
Ali Sakr Esa WaelDepartment of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, OH, USA.
Alparslan TuranDepartment of Outcomes Research, Anesthesiology Institute, Cleveland Clinic, Cleveland, OH, USA. alparslanturan@yahoo.com.
Cleveland Clinic · USOutcomes Research Consortium · USSaint Louis University Hospital · USThe University of Texas Medical Branch at Galveston · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeSciatic nerve block (SNB) is commonly performed in combination with femoral nerve block (FNB) for postoperative analgesia following total knee arthroplasty (TKA). Despite the fact that 10-20 % of TKA patients require SNB for postoperative posterior knee pain, there are no existing studies that suggest a model to predict the need for SNB. The aim of our study was to develop a prediction tool to measure the likelihood of patients undergoing TKA surgery requiring a postoperative SNB.

methodsWith institutional review board approval, we obtained data from the electronic medical record of patients who underwent TKA at the Cleveland Clinic. A multivariable logistic regression was used to estimate the probability of requiring a postoperative SNB. Clinicians selected potential predictors to create a model, and the potential nonlinear association between continuous predictors and SNB was assessed using the restricted cubic spline model.

resultsIn total 6279 TKA cases involving 2329 patients with complete datasets were used for building the prediction model, including 276 (12 %) patients who received a postoperative SNB and 2053 (88 %) patients who did not. The estimated C statistic of the prediction model was 0.64. The nomogram is used by first locating the patient position on each predictor variable scale, which has corresponding prognostic points. The cut-off of 11.6 % jointly maximizes the sensitivity and specificity.

conclusionThis is the first study to be published on SNB prediction after TKA. Our nomogram may prove to be a useful tool for guiding physicians in terms of their decisions regarding SNB.

Indexed as

Sciatic NerveAgedAlgorithmsArthroplasty, Replacement, KneeDatabases, FactualFemaleHumansMaleMiddle AgedNerve BlockNomogramsPostoperative PainPredictive Value of TestsSensitivity and SpecificityNomogramPostoperative painSciatic nerve blockTotal knee arthroplasty

Identifiers

PMID27518727
OpenAlexW2517834436

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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.