Evidence map›Paper›PMID 33397666›Full record

Observational studyBMJ open2021

Chest radiography for simplified evaluation of central venous catheter tip positioning for safe and accurate haemodynamic monitoring: a retrospective observational study.

Minwoo Kang, Jinkun Bae, Sujin Moon, Tae Nyoung Chung

Registry-linked trialOpen access · goldAbstract readObservational Study
In one paragraph

Observational study in BMJ open, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07291869 (A Randomised Feasibility Study of Real-time Intracavity ECG and Thoracic Ultrasound for Central Venous Catheter Tip Confirmation in Critical Care), which is not on this map. Cited by 3 papers.

0numbers the graph read from it
0cells of the map it votes in
3citing papers in PubMed
1.7field-weighted citation impact, top 17% 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.

NCT07291869 narecruitingnot on this mapstarted 2026, after this paper: background citation

A Randomised Feasibility Study of Real-time Intracavity ECG and Thoracic Ultrasound for Central Venous Catheter Tip Confirmation in Critical Care

TypeinterventionalSponsorYork Teaching Hospitals NHS Foundation TrustRan2026 to 2027Enrolled75ConditionsCentral Venous Catheter, Point of Care Ultrasound (POCUS), Intracavitary Electrocardiogram Guiding, Feasibility StudiesArmsIntracavity ECG, Thoracic point of care ultrasound
3 · Its place in the literature

Who cites it

3 citing papers in PubMed, 11 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
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

4 authors at 2 institutions in 1 country.

Minwoo KangDepartment of Emergency Medicine, CHA Bundang Medical Center, CHA University, Seongnam-Si, Gyeonggi-do, Republic of Korea.
Jinkun BaeDepartment of Emergency Medicine, CHA Bundang Medical Center, CHA University, Seongnam-Si, Gyeonggi-do, Republic of Korea.
Sujin MoonSchool of Medicine, CHA University, Seongnam-Si, Gyeonggi-do, Republic of Korea.
Tae Nyoung ChungDepartment of Emergency Medicine, CHA Bundang Medical Center, CHA University, Seongnam-Si, Gyeonggi-do, Republic of Korea hendrix74@gmail.com.ORCID 0000-0003-3537-4136
CHA University Bundang Medical Center · KRCHA University · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesThe tip-to-carina (TC) distance on a simple chest X-ray (CXR) has proven value in the determination of correct central venous catheter (CVC) positioning. However, previous studies have mostly focused on preventing the atrial insertion of the CVC tip, and not on appropriate positioning for accurate haemodynamic monitoring. We aimed to assess whether the TC distance could detect the passage of the CVC tip into the superior vena cava (SVC) and the right atrium (RA), and to accordingly suggest cut-off reference values for these two aspects.

designRetrospective observational cohort study.

settingSingle urban tertiary level academic hospital.

participants479 patients who underwent CXR and chest CT scan after the insertion of a CVC with a 24-hour interval during the study period.

interventionThe TC distance was measured on CXR, and the position of the CVC tip was assessed on the chest CT images. The TC distance was described as a negative or positive number if the CVC tip was above or below the carina, respectively. Receiver-operating characteristics curve analyses were conducted to ascertain the TC distance to detect SVC entrance and RA insertion of CVC tip.

resultsThe TC distance could significantly detect both SVC entrance and RA insertion (p<0.001 for both; area under curve 0.987 and 0.965, respectively), with a reference range of -6.69 to 15.61 mm.

conclusionThe TC distance in CXR is a simple and precise method to confirm not only the safe placement of the CVC tip but also its optimal positioning for accurate haemodynamic monitoring.

Indexed as

Catheterization, Central VenousCentral Venous CathetersHemodynamic MonitoringHumansRadiographyRetrospective StudiesVena Cava, Superioraccident & emergency medicineadult intensive & critical carechest imaging

Identifiers

PMID33397666
PMCPMC7783527
OpenAlexW3118753896

What OpenQuestion holds

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LicenceCC BY-NC
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Registered trials

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.