Evidence map›Paper›PMID 24648591›Full record

ArticleCurrent therapeutic research, clinical and experimental2011

A simple contact heat experimental pain model for evaluation of analgesic agents in healthy volunteers.

Sunil Kumar Reddy Khambam, Madireddy Umamaheshwar Rao Naidu, Pingali Usha Rani, Takallapalli Ramesh Kumar Rao

Open access · goldAbstract read
In one paragraph

Article in Current therapeutic research, clinical and experimental, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
–field-weighted citation impact, top 92% 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

5 citing papers in PubMed, 5 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Article
  4. Article
  5. 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

4 authors at 1 institution in 1 country.

Sunil Kumar Reddy KhambamICMR Advance Centre for Clinical Pharmacodynamics, Departments of Clinical Pharmacology & Therapeutics, Nizam's Institute of Medical Sciences, Andhra Pradesh, India.
Madireddy Umamaheshwar Rao NaiduICMR Advance Centre for Clinical Pharmacodynamics, Departments of Clinical Pharmacology & Therapeutics, Nizam's Institute of Medical Sciences, Andhra Pradesh, India.
Pingali Usha RaniICMR Advance Centre for Clinical Pharmacodynamics, Departments of Clinical Pharmacology & Therapeutics, Nizam's Institute of Medical Sciences, Andhra Pradesh, India.
Takallapalli Ramesh Kumar RaoICMR Advance Centre for Clinical Pharmacodynamics, Departments of Clinical Pharmacology & Therapeutics, Nizam's Institute of Medical Sciences, Andhra Pradesh, India.
Nizam's Institute of Medical Sciences · IN

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundHuman experimental pain models help to understand the mechanism of the underlying clinical pain conditions and can be adopted to test analgesic efficacy of drugs used in the management of pain. In early phases, the clinical development of new analgesic agents is severely hindered due to lack of reliable sensitive tests for the experimental pain models.

objectiveThe aim of the present study was to standardize and validate a simple contact heat pain model that can be used for future screening of various analgesic agents.

methodsThe method was standardized by recording heat detection and heat pain detection threshold in degrees centigrade in 24 healthy volunteers. Reproducibility of the test procedure was evaluated by recording the thermal threshold parameters by a single observer on 2 sessions (inter-day reproducibility) and a second observer on 1 session (inter-observer reproducibility) separately. Validity of model was further tested by evaluating the analgesic effect of tramadol on 12 healthy volunteers.

resultsThermal pain model using contact heat method was found to produce low variability with coefficient of variation <5%. Inter-observer and inter-day reproducibility was very good, as shown by Bland-Altman Plot; with most of the values within 2 SD. There was a significant difference in both heat detection threshold and heat pain detection threshold produced by tramadol, as compared with placebo (P < 0.05).

conclusionsThe newly developed pain model produces a type of experimental pain that is responsive to analgesic effects of tramadol at clinically relevant doses. The model might be useful in early screening of new therapeutic agents before proceeding to expensive clinical trials in acute and chronic pain sufferers.

Indexed as

contact heatheat detectionheat pain detectionreproducibilitytramadolvalidation

Identifiers

PMID24648591
PMCPMC3957161
OpenAlexW1966238529

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.