Evidence map›Paper›PMID 19198803›Full record

Trial reportIntensive care medicine2009

Using midazolam to monitor changes in hepatic drug metabolism in critically ill patients.

Christopher John Kirwan, Terry Lee, David W Holt, R Michael Grounds, Iain A M MacPhee, Barbara J Philips

Abstract readClinical Trial
PubMed Publisher
In one paragraph

Trial report in Intensive care medicine, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed
3.8field-weighted citation impact, top 8% 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

7 citing papers in PubMed, 23 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Cardiac arrest and therapeutic hypothermia decrease isoform-specific cytochrome P450 drug metabolism.Drug metabolism and disposition: the biological fate of chemicals · 2011
    Article
  7. 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

6 authors at 2 institutions in 1 country.

Christopher John KirwanGeneral Intensive Care, St George's University of London, St Georges Hospital Blackshaw Road, London, SW17 0QT, UK. cjkirwan100@msn.com
Terry Lee
David W Holt
R Michael Grounds
Iain A M MacPhee
Barbara J Philips
St George's, University of London · GBSt George's Hospital · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveCritical illness and associated sequelae can cause severe metabolic disturbances. The effects these have on hepatic drug metabolism are poorly understood. In vivo, enzyme specific drug probes are used to measure changes in hepatic drug metabolism but they require multiple blood sampling and are time consuming. We suggest that a single measurement, 4 h after intravenous administration of midazolam is a reliable indicator of integral plasma midazolam exposure or area under the curve (AUC) in critically ill patients. We also explore the hypothesis that acute kidney injury (AKI) directly impairs hepatic metabolism of drugs in critically ill patients.

methodsA prospective study in 20 critically ill patients who were not taking specific enzyme inhibitors or inducers or benzodiazepines. Correlation between 4 h midazolam concentration and AUC was calculated. We also assessed the difference in metabolism between the patients with normal renal function and those with AKI.

resultsFour hour midazolam concentration correlated with AUC r = 0.956 (p < 0.0001). In addition, the 4 h midazolam concentration was greater in critically ill patients with AKI than those with normal renal function p = 0.023.

conclusionA single-time-point determination of plasma midazolam concentration is a reliable predictor of integral plasma midazolam exposure in critically ill patients. This tool can now be used to assess the effects of critical illness on hepatic drug metabolism. Using this method, we suggest that AKI reduces the hepatic metabolism of midazolam in critically ill patients.

Indexed as

Critical IllnessAcute Kidney InjuryAgedAged, 80 and overArea Under CurveCytochrome P-450 CYP3ACytochrome P-450 Enzyme SystemFemaleHumansHypnotics and SedativesLiverMaleMidazolamMiddle AgedProspective StudiesCYP3A protein, humanCytochrome P-450 CYP3ACytochrome P-450 Enzyme SystemHypnotics and SedativesMidazolam

Identifiers

PMID19198803
OpenAlexW2000568558

What OpenQuestion holds

Textmetadata
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.