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Temperature Change, BodyPhase 4HOTONNCT04654429

Does Higher OT Temperature and IV Ondansetron Reduce Incidence of PSS in Parturients?

A Phase 4 study testing IV Ondansetron 4mg, Higher OT temperature range and Lower OT temperature Range in people with Temperature Change, Body and Chills, run by Dr Lim Siu Min at 1 site in Malaysia.

Unknown status

Status not confirmed. The sponsor has not verified this record for over two years, so it may be out of date.

Official record
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Trial summary

This study will look at the incidence of post-spinal shivering (PSS) among the obstetrics population and will investigate whether higher operation theater (OT) temperature range or/and IV Ondansetron are able to reduce the incidence of PSS. Read more about this study

Who is it for?
Ages 18 to 50 years, women onlyHealthy volunteers can take part
Conditions the study is for
Temperature Change, Body, Chills, Tremor
What is being tested?
IV Ondansetron 4mg, Higher OT temperature range and Lower OT temperature Range
Type of treatment
Injection or infusion
Could I receive a placebo?
Yes, some participants may receive a placebo
How many people
628 participants
Where
1 siteMalaysia
Study dates
13 Oct 2020to 30 Dec 2022
Phase
Phase 4
Are there results?
None posted in the registry

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 to 50 years
  • Women only
  • Healthy volunteers accepted
  • Adult

Who may be able to join

  • All elective and emergency obstetric patients who are going for lower segment caesarean section (LSCS) under spinal anaesthesia in UMMC.
  • Patient who are given combined spinal epidural anaesthesia (CSE) without epidural local anaesthetic top-up will be included.

Who cannot join

  • Patients who refused to provide study consent
  • Caesarean section planned under general or epidural anaesthesia or potential conversion to general anaesthesia intraoperatively
  • Royal College of Obstetrics and Gynaecology (RCOG) classification of urgency caesarean section Grade I - Immediate threat to life of woman and child. (29)
  • Patients with psychiatric disorders who are taking selective serotonin reuptake inhibitor (SSRI) and serotonin-noradrenaline reuptake inhibitor (SNRI)
  • Patients who has problems with any types of tremor or involuntary movements and neuromuscular disorders such as Parkinson Disease and muscular dystrophy will be excluded from the study as this will interfere with the clinical interpretation of shivering
  • Patients with history of allergic / hypersensitive reactions towards ondansetron.
  • Patients who received ondansetron intraoperatively as anti-emetics.
  • Recruited patients will be excluded if OT temperature on the day of recruitment does not fulfil the OT temperature range fixed for the study

Trial locations and contacts

1 site in 1 country.

SIU MIN LIM, L contact

6017-7337750

limsiumin@gmail.com

Tsyr Xiang Teoh, M contact

6017-4540608

tsyrxiang@gmail.com

Malaysia1 site, 1 recruiting
  • University Malaya Medical Center

    Kuala Lumpur, 50603

    SIU MIN LIM, L, 6017-7337750, limsiumin@gmail.com

    Tsyr Xiang Teoh, M, 6017-4540608, tsyrxiang@gmail.com

    Recruiting

Other trials in Malaysia

About this study

Official title: Does Higher Operation Theatre Ambient Temperature and Intravenous Ondansetron Prophylaxis Reduce Incidence of Post-spinal Shivering in Obstetric Population? A Double-blind, Randomised, Factorial Study.

This study will look at the incidence of post-spinal shivering (PSS) among the obstetrics population and will investigate whether higher operation theater (OT) temperature range or/and IV Ondansetron are able to reduce the incidence of PSS. This is a double-blind, randomized, factorial study, patients will be grouped into 4 groups - LP, HP, LO, HO (L= low-temperature range, H= high-temperature range, P= placebo, O=Ondansetron). All patients undergoing cesarean section under spinal anesthesia will be recruited, and it will be conducted in obstetrics OT.

Read the detailed description

Many studies have been conducted to look at methods to prevent and treat postspinal shivering. However, there is still no clear protocol or gold standard for post-spinal shivering management. This is due to the fact that post-spinal shivering mechanisms are complex and are broadly grouped into thermoregulatory and non-thermoregulatory. Preventive measures that have been studied are broadly classified into pharmacological methods and non-pharmacological methods. For Non-pharmacological method, active warming of the patient by various methods have been found to be effective in preventing PSS. However, there is no study that looks at ways to reduce heat loss hence maintaining normothermia and preventing PSS in patients. Therefore in this study, we will be investigating if higher OT temperature will reduce the incidence of PSS. As for pharmacological methods, many drugs have been studied for examples analgesics (tramadol), opioid receptor agonists (pethidine, fentanyl), cholinesterase inhibitors (physostigmine), N-methyl-D-aspartate receptor antagonists (ketamine, magnesium sulphate), α2-central agonists (clonidine, dexmedetomidine), antiserotonergic (ondansetron) and anti-inflammatory drugs (dexamethasone). Ondansetron is usually used to prevent chemotherapy or radiotherapy-induced nausea vomiting and Post-operative nausea and vomiting. Due to the fact that it is generally a safe drug and has added benefit as an anti-emetics especially for obstetrics population, this drug is chosen to be studied. We will also look at the efficacy of the combined effect of increased OT temperature and prophylaxis ondansetron on preventing PSS.

Being tested
IV Ondansetron 4mg, Higher OT temperature range, Placebo, Lower OT temperature Range
Keywords
Post-spinal shivering, Subarachnoid block, obstetrics, caesarean section, temperature, ondansetron, factorial study
Medical subject headings
Body Temperature Changes, Chills, Tremor, Postoperative Nausea and Vomiting

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • IV Ondansetron 4mgDrug

    Also called Pharmacological intervention

    IV ondansetron 4mg

  • Higher OT temperature rangeOther

    Also called Non-pharmacological intervention

    OT temperature set to 19-22 degree celsius

  • PlaceboDrug

    Also called Control

    IV Normal Saline 2cc will be given

  • Lower OT temperature RangeOther

    Also called Control

    OT temperature set to 17-19 degree celsius

Study groups in NCT04654429
Study groupRoleWhat they receive
Lower OT temperature with placebo (LP)Placebo comparatorLower OT temperature with placebo This group function as a main control arm. Incidence of PSS will be documented usual / standard OT temperature which is 17-19 degree celsius, and without giving any pharmacological intervention to prevent PSS.
Receives: Drug: Placebo; Other: Lower OT temperature Range
Higher OT temperature with placebo (HP)Active comparatorHigher OT temperature with placebo This group will receive one non-pharmacological intervention, which is higher OT temperature 19-22 degree celsius. The aim of this intervention is to reduce heat loss therefore incidence of PSS for obstetric population coming for lower segment cesarean section (LSCS) by reducing the temperature gradient between the body and environment.
Receives: Other: Higher OT temperature range; Drug: Placebo
Lower OT temperature with IV Ondansetron 4mg (LO)Active comparatorLower OT temperature with Ondansetron 4mg intravenous. This group also will receive one pharmacological intervention, which is IV ondansetron 4mg to prevent incidence of PSS under standard OT temperature 17-19 degrees.
Receives: Drug: IV Ondansetron 4mg; Other: Lower OT temperature Range
higher OT temperature 19-22 and IV ondansetron 4mg (HO)Active comparatorThis group will receive 2 interventions - higher OT temperature 19-22 and IV ondansetron 4mg. This group is designed to see if when both intervention combined, will further reduce the incidence of PSS among obstetrics population.
Receives: Drug: IV Ondansetron 4mg; Other: Higher OT temperature range

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. To Demonstrate higher OT temperature range ( 19.1- 22.0 degree Celcius) is effective in reducing the incidence PSS in parturients.

    Assessment of patient's shivering grade according to Crossley and Mahajan classification in both Higher temperature range group ( 19.1 -22.0 degree Celcius) compared to lower OT temperature range group (17.0 - 19.0 degree Celcius) Grade 0 - No Shivering Grade 1 - No visible muscle activity, but one or more of piloerection , peripheral vasoconstriction or peripheral cyanosis ( other causes excluded) Grade 2 - Muscular activity in only one muscle group Grade 3 - Moderate muscle activity in more than one muscle group but not generalised shaking Grade 4 - Violent muscular that involves the entire body

    Measured: 1 year

  2. To demonstrate IV Ondansetron is effective in reducing the incidence of PSS in parturient undergoing LSCS.

    Assessment of patient's shivering grade according to Crossley and Mahajan classification in both patients receiving placebo group vs receiving Ondansetron group:

    Grade 0 - No Shivering Grade 1 - No visible muscle activity, but one or more of piloerection , peripheral vasoconstriction or peripheral cyanosis ( other causes excluded) Grade 2 - Muscular activity in only one muscle group Grade 3 - Moderate muscle activity in more than one muscle group but not generalised shaking Grade 4 - Violent muscular that involves the entire body

    Measured: 1 year

Secondary outcomes (4)
  1. To determine the incidence of PSS

    Number patients of with shivering grade 3 and above.

    Measured: 1 year

  2. To determine the average threshold body temperature, ⁰C at which shivering occur.

    To determine the average range of temperature that grade 3 and above shivering occurred among the recruited population from linear graph

    Measured: 1 year

  3. To determine the change in body temperature (mean δ Temp ⁰C) at which shivering occur

    To assess average temperature drop in order for shivering to occur from linear graph

    Measured: 1 year

  4. To determine if higher OT temperature range with IV Ondansetron (HO group) is superior to individual intervention alone in reducing the incidence of PSS

    Assessment of patient's shivering grade according to Crossley and Mahajan classification

    Measured: 1 year

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted4 Dec 2020
  2. Study start13 Oct 2020
  3. Primary completion30 Dec 2022 (estimated)
  4. Study completion30 Dec 2022 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 4
Primary purpose
Prevention
Allocation
Randomised
Intervention model
Factorial
Model description
All patients participating in this study will be randomised two times into 4 groups: LP, HP, LO, HO (L= low-temperature range, H= high-temperature range, P= placebo, O=Ondansetron). The OT temperature will be set to a random range on every Monday, 7am to either lower temperature range group (17.0-19.0⁰C), set at 18.0⁰C; or higher temperature range group (19.1-22.0⁰C), set at 21.0⁰C by an OT engineer who is not involved in this study. OT engineer will open a sealed opaque envelope which contains target temperature to be set for the week, which is randomised prior using computer generated sequence. The temperature setting will maintain for one week and change on the following Monday 7am.
Masking
Quadruple blind
Who is masked
Participant, Care provider, Investigator, Outcomes assessor
Enrolment
628 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT04654429
Sponsor's protocol ID
NMRR-20-2158-56283
Other IDs
202073-8861
Acronym
HOTON
Status last verified
Oct 2021
First submitted
11 Nov 2020
Last updated
14 Oct 2021
Results posted
No
Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No: All volunteers identity will be kept anonymous. However demographic data, body biometrics, underlying co-morbidities, indications for cesarean section, and study outcomes will be analysed and tabulated for publication purposes.

Publications

  • Crowley LJ, Buggy DJ. Shivering and neuraxial anesthesia. Reg Anesth Pain Med. 2008 May-Jun;33(3):241-52. doi: 10.1016/j.rapm.2007.11.006.

    PubMed 18433676
  • Choi KE, Park B, Moheet AM, Rosen A, Lahiri S, Rosengart A. Systematic Quality Assessment of Published Antishivering Protocols. Anesth Analg. 2017 May;124(5):1539-1546. doi: 10.1213/ANE.0000000000001571.

    PubMed 27622717
  • Horn EP, Schroeder F, Gottschalk A, Sessler DI, Hiltmeyer N, Standl T, Schulte am Esch J. Active warming during cesarean delivery. Anesth Analg. 2002 Feb;94(2):409-14, table of contents. doi: 10.1097/00000539-200202000-00034.

    PubMed 11812709
  • Alfonsi P. Postanaesthetic shivering. Epidemiology, pathophysiology and approaches to prevention and management. Minerva Anestesiol. 2003 May;69(5):438-42.

    PubMed 12768180
  • Varshney RK, Garg M, Kapoor K, Jheetay GS. The role of ramosetron in the prevention of post-spinal shivering in obstetric patients. A prospective randomized double blind study. Rom J Anaesth Intensive Care. 2019 Apr;26(1):37-43. doi: 10.2478/rjaic-2019-0006.

    PubMed 31111094

Questions about this trial

What is this clinical trial studying?

A Phase 4 study testing IV Ondansetron 4mg, Higher OT temperature range and Lower OT temperature Range in people with Temperature Change, Body and Chills, run by Dr Lim Siu Min at 1 site in Malaysia.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 2 inclusion and 8 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: status not confirmed, as of the sponsor's last update on 14 Oct 2021. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in Malaysia. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. Some participants in this study may receive a placebo. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

Results are not available in the source record.

How can a doctor refer a patient or contact the research team?

Contact SIU MIN LIM, L (6017-7337750, limsiumin@gmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

To Demonstrate higher OT temperature range ( 19.1- 22.0 degree Celcius) is effective in reducing the incidence PSS in parturients. (time frame: 1 year). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT04654429, which also lists 5 linked publications.

Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 14 Oct 2021.

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