Evidence map›Paper›PMID 34040762›Full record

ArticleAnnals of medicine and surgery (2012)2021

Effects of preoperative melatonin on postoperative pain following cesarean section: A randomized clinical trial.

Farshad Hassanzadeh Kiabi, Seyed Abdollah Emadi, Aghdas Ebadi Jamkhaneh, Goli Aezzi, Negar Shahzadeh Ahmadi

Registry-linked trialOpen access · diamondAbstract read
In one paragraph

Article in Annals of medicine and surgery (2012), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT06872944 (Effect of Melatonin on Postoperative Pain After Simple Nephrectomy), which is not on this map. Cited by 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
2.7field-weighted citation impact, top 10% 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.

NCT06872944 early_phase1completednot on this mapstarted 2025, after this paper: background citation

Effect of Melatonin on Postoperative Pain After Simple Nephrectomy: A Randomized Double-Blinded Controlled Study

TypeinterventionalSponsorCairo UniversityRan2025 to 2025Enrolled40ConditionsPain Score (VAS) at 24 h PostoperativelyArmsMelatonin, Sugar Coated Tablet
3 · Its place in the literature

Who cites it

11 citing papers in PubMed, 1 synthesis or guideline pooled it, 16 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Trial
  4. Review
  5. Melatonin's Impact on Wound Healing.Antioxidants (Basel, Switzerland) · 2024
    Review
  6. Article
  7. Article
  8. Review
  9. Review
  10. Article
  11. 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

5 authors at 1 institution in 1 country.

Farshad Hassanzadeh KiabiDepartment of Anesthesiology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.
Seyed Abdollah EmadiDepartment of Anesthesiology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.
Aghdas Ebadi JamkhanehDepartment of Obstetrics and Gynecology., School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.
Goli AezziDepartment of Anesthesiology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran.
Negar Shahzadeh AhmadiStudent of Research Committee, Mazandaran University of Medical Sciences, Sari, Iran.
Mazandaran University of Medical Sciences · IR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundData regarding the analgesic effects of melatonin after the surgery is scare. So far, only one study has investigated the analgesic effect of melatonin during cesarean section.

methodsIn a double-blind randomized controlled clinical trial study, 204 patients undergoing elective cesarean section with class 1 and 2 anesthesia (ASA) were enrolled. Patients were randomly divided into 3 groups of 68 patients. Patients in group A were given 5 mg melatonin tablets, patients in group B were given 10 mg melatonin tablets, and group C was given placebo. All patients underwent spinal anesthesia with the same anesthesia protocol. Pain intensity, nausea, vomiting, pruritus and headache were assessed and recorded 2, 6, 12 and 24 h after surgery. The time of first dose of analgesia, the amount of opioid consumed within 24 h, and the time to resume physical activity was also recorded. Statistical analysis of data was performed using SPSS 20 software.

resultsRepeated measurements of pain intensity during the study showed that in all 3 groups pain intensity was significantly reduced during the study, p < 0.001, respectively. The intensity of pain was significantly different in groups B and C, groups B and A and groups A and C, P < 0.001, respectively. The pain reduction was greatest in group B, followed by group A and group C, respectively. The time interval between the end of surgery and the patient's need for analgesia was significant in group B compared to group A (P = 0.035) and C (P < 0.001) and also in group A compared to group C (P = 0.011). The mean dose of opioid was significantly least in group B, p < 0.001. The mean time to resume physical activity was also shortest in group B, p < 0.001 Headache and nausea/vomiting were observed in 7 patients (10.7%) group A and 7 patients (10.7%) in group C. None of the patients in group B developed complications.

conclusionThe results of the present study showed that the use of 10 mg of melatonin before cesarean section with spinal anesthesia is not only safe, but also reduces the severity of patients' pain, increases the duration of postoperative analgesia, reduces the need for analgesics after surgery and resumption of physical activity.

Indexed as

AnalgesiaCesareanMelatoninPainSpinal anesthesiaSurgery

Identifiers

PMID34040762
PMCPMC8141662
OpenAlexW3162744588

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Registered trials

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.