Evidence map›Paper›PMID 34851734›Full record

Trial reportAmerican journal of physiology. Regulatory, integrative and comparative physiology2022

Low-dose fentanyl does not alter muscle sympathetic nerve activity, blood pressure, or tolerance during progressive central hypovolemia.

Mu Huang, Joseph C Watso, Luke N Belval, Frank A Cimino, Mads Fischer, Caitlin P Jarrard, Joseph M Hendrix, Carmen Hinojosa Laborde, Craig G Crandall

Open access · greenAbstract readRandomized Controlled Trial
In one paragraph

Trial report in American journal of physiology. Regulatory, integrative and comparative physiology, 2022. 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
1.9field-weighted citation impact, top 13% 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, 9 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Trial
  4. Trial
  5. Trial
  6. Pharmacokinetics of Fentanyl and Norfentanyl in a Rat Model of Fixed-Volume Hemorrhagic Shock.European journal of drug metabolism and pharmacokinetics · 2026
    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

9 authors at 4 institutions in 2 countries.

Mu HuangInstitute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas, Texas.ORCID 0000-0001-9526-7944
Joseph C WatsoInstitute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas, Texas.ORCID 0000-0001-7840-0643
Luke N BelvalInstitute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas, Texas.ORCID 0000-0003-0929-8061
Frank A CiminoInstitute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas, Texas.
Mads FischerDepartment of Applied Clinical Research, University of Texas Southwestern Medical Center, Dallas, Texas.
Caitlin P JarrardDepartment of Applied Clinical Research, University of Texas Southwestern Medical Center, Dallas, Texas.
Joseph M HendrixInstitute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas, Texas.ORCID 0000-0003-0216-954X
Carmen Hinojosa LabordeUnited States Army Institute of Surgical Research, JBSA Fort Sam Houston, San Antonio, Texas.ORCID 0000-0001-7104-3305
Craig G CrandallInstitute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas, Dallas, Texas.ORCID 0000-0001-7792-9713
Presbyterian Hospital · USThe University of Texas Southwestern Medical Center · USUnited States Army Institute of Surgical Research · USUniversity of Copenhagen · DK

Funding

Inadequate Cardiovascular and Thermoregulatory Responses in the Elderly during Heat WavesF32HL154565 · NHLBI · UT SOUTHWESTERN MEDICAL CENTER · PI BELVAL, LUKE · 2020 to 2020
$60k
Ketamine-induced Hypertensive Episodes: Adverse Central and Peripheral Neurovascular ActionsF32HL154559 · NHLBI · UT SOUTHWESTERN MEDICAL CENTER · PI WATSO, JOSEPH · 2021 to 2021
$50k
NHLBI NIH HHS F32 HL154559NHLBI NIH HHS F32 HL154565NHLBI NIH HHS L30 HL154189
6 · The paper itself

Abstract

Hemorrhage is a leading cause of battlefield and civilian trauma deaths. Several pain medications, including fentanyl, are recommended for use in the prehospital (i.e., field setting) for a hemorrhaging solider. However, it is unknown whether fentanyl impairs arterial blood pressure (BP) regulation, which would compromise hemorrhagic tolerance. Thus, the purpose of this study was to test the hypothesis that an analgesic dose of fentanyl impairs hemorrhagic tolerance in conscious humans. Twenty-eight volunteers (13 females) participated in this double-blinded, randomized, placebo-controlled trial. We conducted a presyncopal limited progressive lower body negative pressure test (LBNP; a validated model to simulate hemorrhage) following intravenous administration of fentanyl (75 µg) or placebo (saline). We quantified tolerance as a cumulative stress index (mmHg·min), which was compared between trials using a paired, two-tailed

Indexed as

AdultAnalgesics, OpioidBlood PressureCardiovascular SystemCross-Over StudiesDouble-Blind MethodFemaleFentanylHemorrhageHumansHypovolemiaInfusions, IntravenousLower Body Negative PressureMaleMiddle AgedMuscle, SkeletalAnalgesics, OpioidFentanylcerebral tissue oxygenationopioidsrespirationsympathoexcitatory

Identifiers

PMID34851734
PMCPMC8742719
OpenAlexW3216270773

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.