Evidence map›Paper›PMID 42439962›Full record

ArticleJournal of artificial organs : the official journal of the Japanese Society for Artificial Organs2026

Fracture of the cannula tip during removal of a long-term indwelling Impella 5.5: a case report.

Ryuhei Yamamoto, Yusuke Iguchi, Bryan James Mathis, Hiroaki Sakamoto

Abstract readCase Reports
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In one paragraph

Article in Journal of artificial organs : the official journal of the Japanese Society for Artificial Organs, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

0numbers the graph read from it
0cells of the map it votes in
0citing 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

0 citing papers in PubMed.

No citing paper in PubMed yet.

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.

Ryuhei YamamotoDepartment of Cardiovascular Surgery, University of Tsukuba Hospital, 2-1-1 Amakubo, Tsukuba, 305-8576, Japan.
Yusuke IguchiDepartment of Cardiovascular Surgery, University of Tsukuba Hospital, 2-1-1 Amakubo, Tsukuba, 305-8576, Japan.
Bryan James MathisDepartment of Cardiovascular Surgery, University of Tsukuba Hospital, 2-1-1 Amakubo, Tsukuba, 305-8576, Japan.
Hiroaki SakamotoDepartment of Cardiovascular Surgery, University of Tsukuba Hospital, 2-1-1 Amakubo, Tsukuba, 305-8576, Japan. sakamotoh@md.tsukuba.ac.jp.ORCID http://orcid.org/0000-0002-5416-3871

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We report a rare device fracture during Impella 5.5 explantation for cardiogenic shock in a 77-year-old man with prolonged device support. Following stabilization, device removal was attempted on day 50. During withdrawal, marked resistance was encountered and the cannula tip fractured, remaining within the prosthetic graft. The tip was surgically retrieved following extension of the dissection. Post-explantation, the patient developed acute right upper extremity ischemia, likely due to vasospasm, which resolved spontaneously. This case underscores the importance of recognizing marked resistance during Impella explantation, as excessive stress concentration and mechanical shearing forces may contribute to device fracture.

Indexed as

CannulaDevice RemovalEquipment FailureHeart-Assist DevicesShock, CardiogenicAgedHumansMaleCannula fractureCardiogenic shockImpella 5.5Temporary circulatory support

Identifiers

PMID42439962

What OpenQuestion holds

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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.