Acupuncture for Preterm Infants Requiring Eye-exam

Background: Infants in neonatal intensive care units (NICU) may experience as many as 14 painful and stressful procedures every day. Even common and seemingly innocuous procedures like routine eye exams can cause relatively severe pain that is only marginally alleviated by powerful analgesics like morphine. Infants subject to severe and repeated episodes of pain are at risk of immediate and long-term sequelae, including intraventricular hemorrhage, impaired neurodevelopment, poor postnatal growth, cognitive and motor dysfunction and emotional dysregulation. Pharmacological analgesia is often used in the NICU to either prevent or alleviate procedural pain but none are completely effective and almost all have potentially detrimental side-effects. Non-pharmacological measures (e.g., kangaroo care and breastfeeding) are also used but these methods may not be feasible in very sick infants or if pain is extremely severe. Methods to provide safe and effective analgesia for babies in the NICU are therefore needed. Acupuncture has been used for thousands of years to prevent and treat pain and various health conditions. There are many forms of acupuncture, including needling, electrical currents, laser, and pressure, all of which aim to modulate activity of key nociceptive structures, neurotransmitter secretions and parasympathetic function. The investigator have reported about the safety and efficacy of auricular magnetic acupuncture (MA) in the NICU environment during heel pricks or neonatal withdrawal. One of the most common and painful procedure preterm infants experience during their NICU stay is their weekly eye-exam to assess for Retinopathy of Prematurity. Currently, during the eye exam infants receive sucrose for analgesia, which has very limited effects on pain release. The investigator propose to examine if using auricular MA will reduce pain during their eye-exam.

Research question: Does auricular MA decrease pain in preterm infants compared to placebo with control.

Aim: To determine if auricular MA will reduce pain compared to placebo with control in preterm infants during their eye exam.

Hypothesis: The investigator hypotheses that auricular MA will reduce pain compared to placebo with control in preterm infants during their eye exam.

Methods: Infants who will require their routine eye exam (beginning at 32 weeks corrected age) will be randomized to either auricular MA or auricular placebo/sucrose after parental informed consent. Five auricular MA or placebo stickers will be placed on acupuncture sites on both ears for 1 hour prior to the eye-exam by a non-blinded investigator. Pain responses will be assessed with the Premature Infant Pain Profile (PIPP) by blinded clinicians before, during and after each eye-exam. The study will be conducted in the NICU at the Royal Alexandra Hospital as a single-blinded randomized, placebo controlled study to investigate the safety and feasibility of using magnetic stickers in the NICU environment. The randomization sequence will be pre-specified, computer generated into block sizes of 2-4. Allocations will be concealed in sequential opaque envelopes stored in a secure location. A single unblinded investigator will complete randomization, administer the intervention, but will not be involved in data collection. Infants will be randomized to receive either MA or placebo stickers that are to be applied bilaterally to the 5 auricular acupuncture points as per the Battlefield Acupuncture (BFA) protocol at least 1 hour prior to the eye-exam by the unblinded investigator. Placebos will be constructed by removing the magnet ball from pre commercially-available MA plasters (Sakamura, Helio Acupuncture, Japan). The magnet site on placebo and magnetic stickers will then be concealed with a thick application of white, opaque correction fluid. Stickers will be removed 1 hour after the eye-exam. Sucrose for pain management can be given as per NICU policy. The ROP eye exams are performed by a dedicated group of five physicians therefore consistency will be maintained. Primary outcome: Infant's response to the pain during the eye-exam, measured by the PIPP score, a validated, quantitative pain assessment tool for use in premature infants.

Expected outcomes: The proposed study aims to examine if auricular MA compared to placebo will decrease pain in premature infants. If validated, the results of the study could be translated into NICUs around the world and might benefit a large number of babies each year.

Inclusion criteria

• Infants weighing less than 1250g at birth admitted into the NICU at the Royal Alexandra Hospital will require routine,regularly scheduled ROP eye-exams beginning at 32 weeks corrected age. We will not enroll any infant who meets any exclusion criteria.

Exclusion criteria

• Chronic pain stimuli (e.g. infants who have had recent surgery)
• Neurological problems that could impair pain perception (e.g. diagnosis of intraventricular hemorrhages Grade III or greater)
• Cardiorespiratory problems that could impair oxygenation (e.g. any infant who is intubated and requiring mechanical ventilation)