Evidence map›Paper›PMID 39134712›Full record

ArticleScientific reports2024

An explorative analysis on the optimal cryo-passes and freezing time of the ultrathin cryoprobe in endobronchial ultrasound-guided transbronchial mediastinal cryobiopsy.

Sze Shyang Kho, Shirin Hui Tan, Chun Ian Soo, Hema Yamini Devi Ramarmuty, Chan Sin Chai, Nai Chien Huan, Khai Lip Ng, Yuji Matsumoto, Venerino Poletti, Siew Teck Tie

Abstract read
In one paragraph

Article in Scientific reports, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
–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

18 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Trial
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Reply to LeeAmerican journal of respiratory and critical care medicine · 2025
    Article
  16. Article
  17. Article
  18. 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

10 authors.

Sze Shyang KhoDivision of Respiratory Medicine, Department of Medicine, Sarawak General Hospital, Jalan Hospital, Ministry of Health Malaysia, Kuching, Sarawak, Malaysia. khosze@moh.gov.my.
Shirin Hui TanClinical Research Centre, Sarawak General Hospital, Institute for Clinical Research, National Institutes of Health, Ministry of Health Malaysia, Kuching, Sarawak, Malaysia.
Chun Ian SooDivision of Respiratory Medicine, Department of Medicine, University Malaya Medical Centre, University Malaya, Kuala Lumpur, Malaysia.
Hema Yamini Devi RamarmutyDepartment of Respiratory Medicine, Queen Elizabeth Hospital, Ministry of Health Malaysia, Kota Kinabalu, Sabah, Malaysia.
Chan Sin ChaiDivision of Respiratory Medicine, Department of Medicine, Sarawak General Hospital, Jalan Hospital, Ministry of Health Malaysia, Kuching, Sarawak, Malaysia.
Nai Chien HuanDepartment of Respiratory Medicine, Queen Elizabeth Hospital, Ministry of Health Malaysia, Kota Kinabalu, Sabah, Malaysia.
Khai Lip NgDepartment of Respiratory Medicine, Queen Elizabeth Hospital, Ministry of Health Malaysia, Kota Kinabalu, Sabah, Malaysia.
Yuji MatsumotoRespiratory Endoscopy Division, Department of Endoscopy, National Cancer Center Hospital, Tokyo, Japan.
Venerino PolettiDepartment of Medical Specialities-Pulmonology, GB Morgagni Hospital, Forlì, Italy.
Siew Teck TieDivision of Respiratory Medicine, Department of Medicine, Sarawak General Hospital, Jalan Hospital, Ministry of Health Malaysia, Kuching, Sarawak, Malaysia.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

EBUS-guided transbronchial mediastinal cryobiopsy (TBMC) has emerged as a promising biopsy tool for diagnosing hilar and mediastinal pathologies. However, several fundamental technical aspects of TBMC remain unexplored. This study aims to determine the optimal number of cryo-passes and freezing time of the ultrathin cryoprobe in EBUS-TBMC concerning specimen size and procedural diagnostic yield. We conducted a retrospective chart review of patients with mediastinal and hilar lesions who underwent EBUS-TBMC between January 2021 and April 2023 across three hospitals in Malaysia. A total of 129 EBUS-TBMC procedures were successfully completed, achieving an overall diagnostic yield of 88.4%. Conclusive TBMC procedures were associated with larger specimen sizes (7.0 vs. 5.0 mm, p < 0.01). Specimen size demonstrated a positive correlation with diagnostic yield (p < 0.01), plateauing at specimen size of 4.1-6.0 mm. A significant positive correlation was also observed between the number of cryo-passes and both specimen size (p < 0.01) and diagnostic yield (p < 0.05). Diagnostic yield plateaued after 2-3 cryo-passes. In contrast, longer freezing times trended towards smaller specimens and lower diagnostic yield, though not reaching statistical significance. The highest diagnostic yield was recorded at the 3.1-4.0 s freezing time. The safety profile of TBMC remains favourable, with one case (0.8%) of pneumothorax and nine cases (7%) of self-limiting bleeding. In our cohort, TBMC performance with 2-3 cryo-passes and a 3.1-4.0 s freezing time to achieve a total aggregate specimen size of 4.1-6.0 mm appeared optimal. Further prospective studies are needed to validate these findings.

Indexed as

CryosurgeryFreezingAdultAgedBronchoscopyFemaleHumansMaleMediastinumMiddle AgedRetrospective StudiesCryo-passEndobronchial ultrasoundFreezing timeMediastinal cryobiopsyTransbronchial needle aspiration

Identifiers

PMID39134712
PMCPMC11319585

What OpenQuestion holds

Textmetadata
LicenceCC BY
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 OpenQuestion graph.