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Inhaled Nitrous Oxide for Pain Relief During Eye Exam in the Pre-term Infant

This study has been completed.
Information provided by (Responsible Party):
Nabeel Ali, McGill University Health Center Identifier:
First received: February 13, 2008
Last updated: October 28, 2013
Last verified: October 2013

The primary objective of the proposed study is to show that inhaled equimolar mixture of oxygen and nitrous oxide (EMONO) will reduce pain associated with retinal exam in the preterm infant, as compared to the current standard treatment (oral sucrose and topical anaesthesia).

The investigators also aim to show that EMONO can be used safely in preterm neonates undergoing retinal exam, and will not result in any increase in apnea, bradycardia, or desaturation in the 24 hours following the exam. Finally, the investigators aim to show that EMONO will keep the infant calm, and make retinal examination easier and less traumatic.

Condition Intervention Phase
Retinopathy of Prematurity Other: N2O Other: oxygen Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Care Provider, Investigator)
Primary Purpose: Treatment
Official Title: A Randomized Controlled Trial on the Effectiveness of Inhaled Nitrous Oxide for Pain Relief During ROP Screening Exam in the Pre-term Infant

Resource links provided by NLM:

Further study details as provided by Nabeel Ali, McGill University Health Center:

Primary Outcome Measures:
  • The primary objective is to show decrease of pain response in the treatment group as measured by the PIPP (Premature Infant Pain Profile) score [ Time Frame: PIPP score before, during and after eye exam ]

Secondary Outcome Measures:
  • Heart and respiratory rate will be monitored using one of our NICU integrated monitors. Continuous pulse oximetry will be performed with a Masimo Radical pulse oximeter. [ Time Frame: during 48 hours ]

Enrollment: 40
Study Start Date: March 2008
Study Completion Date: April 2010
Primary Completion Date: April 2010 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: A
O2 and N2O
Other: N2O
Other Name: equimolar oxygen and nitrous oxide
Active Comparator: B
O2 only
Other: oxygen

  Show Detailed Description


Ages Eligible for Study:   32 Weeks and older   (Child, Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Requiring retinal exam for ROP screening
  • Clinically stable
  • At least 30 0/7 weeks of corrected gestational age at the time of study
  • Not on mechanical ventilation or CPAP at the time of study
  • Requiring an inspired concentration of oxygen less than 50%

Exclusion Criteria:

  • - Craniofacial malformations
  • Cyanotic cardiac disease
  • Hemodynamically significant cardiac lesions
  • Known pneumothorax or pneumomediastinum
  • Congenital pulmonary malformations
  • Neuromuscular disease
  • Receiving opiates, benzodiazepines or barbiturates at the time of study
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00623220

Canada, Quebec
Royal Victoria Hospital
Montreal, Quebec, Canada, H3A 1A1
Sponsors and Collaborators
Nabeel Ali
  More Information

Publications automatically indexed to this study by Identifier (NCT Number):
Responsible Party: Nabeel Ali, Doctor, McGill University Health Center Identifier: NCT00623220     History of Changes
Other Study ID Numbers: 07-008-PED
Study First Received: February 13, 2008
Last Updated: October 28, 2013

Keywords provided by Nabeel Ali, McGill University Health Center:
pain, retinopathy of prematurity, infant, premature, eye exam, nitrous oxide

Additional relevant MeSH terms:
Retinal Diseases
Premature Birth
Retinopathy of Prematurity
Eye Diseases
Obstetric Labor, Premature
Obstetric Labor Complications
Pregnancy Complications
Infant, Premature, Diseases
Infant, Newborn, Diseases
Nitrous Oxide
Anesthetics, Inhalation
Anesthetics, General
Central Nervous System Depressants
Physiological Effects of Drugs
Analgesics, Non-Narcotic
Sensory System Agents
Peripheral Nervous System Agents processed this record on September 20, 2017