Intranasal Fentanyl for Acute Pain: Techniques to Enhance Efficacy

Intranasal Fentanyl for First-Trimester Uterine Aspiration Pain:A Randomized Controlled Trial

OBJECTIVE

To evaluate whether administration of intranasal fentanyl reduces reported pain during first-trimester uterine aspiration.

STUDY DESIGN

We conducted a multicenter, randomized, double-blind, placebo-controlled trial of patients with pregnancies less than or equal to 14 weeks gestation seeking uterine aspiration for induced abortion, early pregnancy loss, or failed medication abortion. We randomized participants 1:1 to either intranasal fentanyl 100 mcg or intranasal placebo. All participants received ibuprofen and a standardized paracervical block. The primary outcome was pain indicated at the time of uterine aspiration on a 100 mm visual analog scale (VAS). We designed the study to detect a 15 mm difference in mean pain scores, which required 53 people in each arm for a total of 106 participants. Secondary outcomes included post-procedure pain and patient satisfaction with pain control.

RESULTS

From March 2017 through June 2018, we screened 355 people for eligibility and enrolled 107 participants. Those who received intranasal fentanyl reported similar uterine aspiration pain to participants receiving placebo (58.4±28.0 fentanyl vs 58.6±24.5 placebo, p=0.97). Participants receiving intranasal fentanyl also reported similar post-procedure pain scores compared to participants receiving placebo (19.1±19.4 fentanyl vs 17.2±19 placebo, p=0.63), and were equally satisfied with procedure pain control (66.8±31.2 fentanyl vs 63.3±29.2 placebo, p=0.57).

CONCLUSION

Intranasal fentanyl did not decrease reported pain with first-trimester uterine aspiration, nor did it decrease post-procedure pain compared to placebo. As an adjunct to ibuprofen and paracervical block, intranasal fentanyl did not improve patient satisfaction with pain control.

Intranasal fentanyl in the palliative care of newborns and infants

CONTEXT

Perinatal palliative care is an area of increasing focus among clinicians supporting newborns and their families. Although not every newborn will survive the neonatal period, assuring their comfort and quality of life remains an imperative for their care providers. It can be challenging to administer medications such as opioids in a minimally invasive yet effective manner.

OBJECTIVES

To describe the experience using intranasal (IN) fentanyl in the management of distress in a case series of 11 dying neonates.

METHODS

A retrospective chart review was undertaken of 58 consecutive referrals of newborns and infants aged six months or younger between November 2006 and July 2010 to the Winnipeg Regional Health Authority Pediatric Palliative Care Service to determine how often IN fentanyl was used and review documented responses after the medication.

RESULTS

Of 58 referrals, IN fentanyl was used in 11 patients, in all cases for concerns regarding respiratory distress. Chart documentation indicated that fentanyl was tolerated well, with no circumstances of drug-related apnea and no occurrences of chest wall rigidity. In most cases, labored breathing and restlessness settled after medication administration. The average time from administration of the last dose of fentanyl until death was 61 minutes.

CONCLUSION

We found IN fentanyl, which can be administered in a variety of care settings, to be a minimally invasive means of palliating distress in dying newborns and infants. No adverse events related to its use were noted.

Pharmacotherapy for acute pain in children: current practice and recent advances

INTRODUCTION

Acute pain in children may be undertreated. Improved understanding of developmental neurobiology and paediatric pharmacokinetics should facilitate better management of pharmacotherapy. The objective of this review is to discuss current paediatric practice and recent advances with these analgesic agents by using an evidence-based approach.

AREAS COVERED

Using PubMed an extensive literature review was conducted on the commonly used analgesic agents in children from 2000 to April 2010.

EXPERT OPINION

A multimodal analgesic regimen provides better pain control and functional outcome in children. The choice of pharmacological treatment is determined by the severity and type of pain. However, more research and evidence is required to determine the optimal drug combinations.