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CompletedNCT02512055Updated Jul 30, 2015

Ketamine Tolerance in Children After Repeated Administrations During Radiotherapy Sessions

A Phase 4 interventional study of Ketamine in Conscious Sedation Failure During Procedure, sponsored by Baskent University. Completed. Open to participants aged 1 Year to 14 Years. Per ClinicalTrials.gov, last updated 2015-07-30.

Sponsored by Baskent University · Phase 4, Interventional, and Treatment

Phase
Phase 4
Study type
Interventional
Enrollment
33
Allocation
Not applicable
Ages
1 Year to 14 Years
Sex
All
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Study summary

Ketamine provides a safety zone for sedated but spontaneously ventilated children especially in remote conditions such as radiotherapy units where sedation is an essential practice for children to keep calm and motionless In this study, investigators planned to analyse ketamine doses needed and the recovery times in pediatric oncology patients undergoing repeated radiotherapy sessions.

Read the detailed description

Ketamine provides a safety zone for sedated but spontaneously ventilated children especially in remote conditions such as radiotherapy units where sedation is an essential practice for children to keep calm and motionless.However, there had been a disagreement about the ketamine doses needed for a continuous and steady level of sedation during repeated radiotherapy sessions in children. In this study, investigators planned to analyse ketamine doses needed and the recovery times in pediatric oncology patients undergoing repeated radiotherapy sessions.After approval from the Baskent University, School of Medicine, Ethics and Research Committee (KA09/247) and informed consents of the patients' guardians, 33 pediatric patients undergoing radiotherapy due to oncologic disorders were enrolled to receive ketamine 2 mg/kg and atropine 10 μg/kg.Patients' demographic data such as age, gender, weight, ASA physical status and duration and total number of radiotherapy sessions were noted. Total ketamine consumption to maintain the targeted sedation level during each session, additional dose administration and the recovery time were recorded. The adverse events such as apnea, laryngospasm, bronchospasm, desaturation, respiratory depression, bradycardia, sedation levels deeper or superficial than intended to, excessive salivation, allergy, nausea and vomiting and need for emergency medication were also noted after each session. The study drugs were prepared, labelled and administered by an anesthetist according to the study protocol and data were recorded by an anesthetist blind to the amount of the study drug used.

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Conditions studied

  • Conscious Sedation Failure During Procedure
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In context

Lead sponsor

Baskent University is the lead sponsor of 201 studies on the registry; 36 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
1 Year to 14 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • pediatric patients undergoing radiotherapy due to oncologic disorders

Exclusion criteria

Exclusion Criteria:

  • Patients younger than 1 year and older than 14 year,
  • patients with cardiac, renal or liver function abnormalities, who were already under sedative drug treatment or allergic to the drugs to be used or the patients for whom the study drugs
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Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
Single (Investigator)
Enrollment
33 participants (actual)

Study arms

  • Experimental
    Group 1

    Pediatric patients undergoing repeat radiotherapy session under ketamine sedation

    Drug: Ketamine

Interventions

  • DrugKetamine

    Repeated ketamine 2 mg/kg administration intravenously for sedation during each radiotherapy sessions

    Also known as: Atropine

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What researchers measure

Primary outcomes

  1. Total ketamine consumption during each session

    Time frame: peroperative 3 hours

Secondary outcomes

  1. Recovery time

    Time frame: peroperative 3 hours

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Study locations

No study locations are listed for this record.

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References and documents

Publications

  • Hoffman GM, Nowakowski R, Troshynski TJ, Berens RJ, Weisman SJ. Risk reduction in pediatric procedural sedation by application of an American Academy of Pediatrics/American Society of Anesthesiologists process model. Pediatrics. 2002 Feb;109(2):236-43. doi: 10.1542/peds.109.2.236. PubMed 11826201 ↗
  • Lois F, De Kock M. Something new about ketamine for pediatric anesthesia? Curr Opin Anaesthesiol. 2008 Jun;21(3):340-4. doi: 10.1097/ACO.0b013e3282f82bde. PubMed 18458551 ↗
  • Macnab AJ, Levine M, Glick N, Susak L, Baker-Brown G. A research tool for measurement of recovery from sedation: the Vancouver Sedative Recovery Scale. J Pediatr Surg. 1991 Nov;26(11):1263-7. doi: 10.1016/0022-3468(91)90594-j. PubMed 1812252 ↗
  • Tobias JD. Tolerance, withdrawal, and physical dependency after long-term sedation and analgesia of children in the pediatric intensive care unit. Crit Care Med. 2000 Jun;28(6):2122-32. doi: 10.1097/00003246-200006000-00079. PubMed 10890677 ↗
  • Trujillo KA, Akil H. Inhibition of opiate tolerance by non-competitive N-methyl-D-aspartate receptor antagonists. Brain Res. 1994 Jan 7;633(1-2):178-88. doi: 10.1016/0006-8993(94)91538-5. PubMed 8137155 ↗
  • Trujillo KA. The neurobiology of opiate tolerance, dependence and sensitization: mechanisms of NMDA receptor-dependent synaptic plasticity. Neurotox Res. 2002 Jun;4(4):373-91. doi: 10.1080/10298420290023954. PubMed 12829426 ↗
  • Trujillo KA, Zamora JJ, Warmoth KP. Increased response to ketamine following treatment at long intervals: implications for intermittent use. Biol Psychiatry. 2008 Jan 15;63(2):178-83. doi: 10.1016/j.biopsych.2007.02.014. Epub 2007 Jun 13. PubMed 17568566 ↗
  • Zapantis A, Leung S. Tolerance and withdrawal issues with sedation. Crit Care Nurs Clin North Am. 2005 Sep;17(3):211-23. doi: 10.1016/j.ccell.2005.04.011. PubMed 16115529 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 30, 2015, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT02512055
Lead sponsor
Baskent University
Responsible party
Oya Yalcin Cok (Associate Professor, Baskent University) — Principal investigator
First posted
Jul 30, 2015
Start date
May 2012
Primary completion
May 2014
Completion
May 2014
Last update
Jul 30, 2015

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

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