Evidence map›Paper›PMID 41840265›Full record

Observational studyPharmaceutical research2026

Impact of Postnatal Changes in Creatinine Levels on Plasma Gentamicin Concentrations in Neonates.

Haruka Tsushita, Ryota Tanaka, Masanori Inoue, Ryosuke Tatsuta, Shintaro Kishimoto, Tomoki Maeda, Naoki Yoshikawa, Kenji Ihara, Hiroki Itoh

Abstract readObservational Study
In one paragraph

Observational study in Pharmaceutical research, 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

9 authors.

Haruka TsushitaDepartment of Clinical Pharmacy, Oita University Hospital, 1-1 Idaigaoka, Hasama, Yufu, Oita, 879-5593, Japan.
Ryota TanakaDepartment of Clinical Pharmacy, Oita University Hospital, 1-1 Idaigaoka, Hasama, Yufu, Oita, 879-5593, Japan. rtanaka@oita-u.ac.jp.ORCID http://orcid.org/0000-0002-8452-7971
Masanori InoueDepartment of Pediatrics, Faculty of Medicine, Oita University, Yufu, Oita, Japan.
Ryosuke TatsutaDepartment of Clinical Pharmacy, Oita University Hospital, 1-1 Idaigaoka, Hasama, Yufu, Oita, 879-5593, Japan.
Shintaro KishimotoDepartment of Pediatrics, Faculty of Medicine, Oita University, Yufu, Oita, Japan.
Tomoki MaedaDepartment of Pediatrics, Faculty of Medicine, Oita University, Yufu, Oita, Japan.
Naoki YoshikawaDepartment of Clinical Pharmacy, Oita University Hospital, 1-1 Idaigaoka, Hasama, Yufu, Oita, 879-5593, Japan.
Kenji IharaDepartment of Pediatrics, Faculty of Medicine, Oita University, Yufu, Oita, Japan.
Hiroki ItohDepartment of Clinical Pharmacy, Oita University Hospital, 1-1 Idaigaoka, Hasama, Yufu, Oita, 879-5593, Japan.

Funding

Japan Society for the Promotion of Science JP25H00260
6 · The paper itself

Abstract

objectiveGentamicin (GM), a renally eliminated drug, is widely used to treat infections in neonates. Neonatal dosing is typically based on body weight and postmenstrual age (PMA). Although serum creatinine (Cr) is the gold standard for evaluating renal function, Cr at birth may reflect both neonatal and maternal levels. This study aimed to identify determinants of trough GM concentrations, focusing on renal function parameters.

methodsThis retrospective, single-center, observational study included 78 neonates who started intravenous GM on postnatal days 0-1. Dosing regimen was stratified by birth weight: < 1200 g (n = 22), 5 mg/kg every 48 h; 1200-1999 g (n = 10), 4 mg/kg every 36 h; ≥ 2000 g (n = 46), 4 mg/kg every 24 h. Dose-normalized trough concentration (C/D) was calculated by dividing trough GM concentration by 24-h equivalent GM dose. Cr level measured at birth (Cr

resultsIn neonates < 1200 g and 1200-1999 g, Cr

conclusionPMA-based dosing appears to be preferable for determining initial GM dosing on postnatal day 0, whereas Cr-based renal function parameters may be more effective for guiding maintenance dosing.

Indexed as

Anti-Bacterial AgentsCreatinineGentamicinsBirth WeightFemaleHumansInfant, NewbornMaleRetrospective StudiesAnti-Bacterial AgentsCreatinineGentamicinscreatininegentamicinneonaterenal functiontherapeutic drug monitoring

Identifiers

PMID41840265
PMCPMC13179275

What Socratic holds

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LicenceCC BY-NC-ND
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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.