Evidence map›Paper›PMID 25783425›Full record

SynthesisBMJ open2015

The efficacy of sodium bicarbonate in preventing contrast-induced nephropathy in patients with pre-existing renal insufficiency: a meta-analysis.

Bin Zhang, Long Liang, Wenbo Chen, Changhong Liang, Shuixing Zhang

Open access · goldAbstract readMeta-AnalysisReview
In one paragraph

Synthesis in BMJ open, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 3 pooled it
6.3field-weighted citation impact, top 3% 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

17 citing papers in PubMed, 3 syntheses or guidelines pooled it, 60 citations in OpenAlex.

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  15. Contrast-induced acute kidney injury: A review of practical points.World journal of nephrology · 2017 · on this map
    Review
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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

5 authors at 2 institutions in 1 country.

Bin ZhangDepartment of Radiology, Guangdong Academy of Medical Sciences/Guangdong General Hospital, Graduate College, Guangzhou, Guangdong Province, China Southern Medical University, Guangzhou, Guangdong Province, China.
Long LiangDepartment of Radiology, Guangdong Academy of Medical Sciences/Guangdong General Hospital, Graduate College, Guangzhou, Guangdong Province, China Southern Medical University, Guangzhou, Guangdong Province, China.
Wenbo ChenDepartment of Radiology, Guangdong Academy of Medical Sciences/Guangdong General Hospital, Graduate College, Guangzhou, Guangdong Province, China.
Changhong LiangDepartment of Radiology, Guangdong Academy of Medical Sciences/Guangdong General Hospital, Graduate College, Guangzhou, Guangdong Province, China.
Shuixing ZhangDepartment of Radiology, Guangdong Academy of Medical Sciences/Guangdong General Hospital, Graduate College, Guangzhou, Guangdong Province, China.
Guangdong Academy of Medical Sciences · CNSouthern Medical University · CN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveThe aim of this meta-analysis was to explore the efficacy of sodium bicarbonate in preventing contrast-induced nephropathy (CIN).

methodsWe searched PubMed, Medline and the Cochrane Library from 1 January 2004 to 1 August 2014. The effect estimate was expressed as a pooled OR with 95% CI, using the fixed-effects or random-effects model.

results20 randomised controlled trials (n=4280) were identified. Hydration with sodium bicarbonate was associated with a significant decrease in CIN among patients with pre-existing renal insufficiency (OR 0.67, 95% CI 0.47 to 0.96; p=0.027). However, moderate heterogeneity was noted across trials (I(2)=48%; p=0.008). Subgroup analyses indicated a better effect of sodium bicarbonate in studies using low-osmolar (OR 0.59, 95% CI 0.37 to 0.93; p=0.024) compared with iso-osmolar contrast agents (OR 0.76, 95% CI 0.43 to 1.34; p=0.351). The odds of CIN with sodium bicarbonate were lower in studies including only patients undergoing emergency (OR 0.16, 95% CI 0.05 to 0.51; p=0.002) compared with elective procedures (OR 0.76, 95% CI 0.54 to 1.06; p=0.105). Sodium bicarbonate was more beneficial in patients given a bolus injection before procedures (OR 0.15, 95% CI 0.04 to 0.54; p=0.004) compared with continuous infusion (OR 0.75, 95% CI 0.53 to 1.05; p=0.091). Sodium bicarbonate plus N-acetylcysteine (OR 0.17, 95% CI 0.04 to 0.79; p=0.024) was better than sodium bicarbonate alone (OR 0.71, 95% CI 0.48 to 1.03; p=0.071). The effect of sodium bicarbonate was considered greater in papers published before (OR 0.19, 95% CI 0.09 to 0.41; p=0.000) compared with after 2008 (OR 0.85, 95% CI 0.62 to 1.16; p=0.302). However, no significant differences were found in mortality (OR 0.69, 95% CI 0.36 to 1.32; p=0.263) or requirement for dialysis (OR 1.08, 95% CI 0.52 to 2.25; p=0.841).

conclusionsSodium bicarbonate is effective in preventing CIN among patients with pre-existing renal insufficiency. However, it fails to lower the risks of dialysis and mortality and therefore cannot improve the clinical prognosis of patients with CIN.

Indexed as

AcetylcysteineAcute Kidney InjuryContrast MediaFluid TherapyFree Radical ScavengersHumansOsmolar ConcentrationRandomized Controlled Trials as TopicRenal DialysisRenal InsufficiencySodium BicarbonateAcetylcysteineContrast MediaFree Radical ScavengersSodium Bicarbonate

Identifiers

PMID25783425
PMCPMC4368906
OpenAlexW2152497726

What Socratic holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

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 Socratic graph.