Clinical trial NCT04353960: The Alaska Oculocardiac Reflex Study
Official title: The Alaska Oculocardiac Reflex Study
Study type: OBSERVATIONAL
Overall status: RECRUITING
Conditions: Bradycardia
Strabismus
Keywords: oculocardiac reflex
Lead sponsor: Alaska Blind Child Discovery
Sponsor class: OTHER
First posted: 2020-04-21
Enrollment: 4000
Sex: ALL
Minimum age (years): 1
Maximum age (years): 100
Standard ages: CHILD
ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Observational model: COHORT
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Adults and children undergoing ocular manipulation and tension on extra ocular muscles and strabismus surgery

Brief summary: Observation study monitoring vital signs and anesthetic variables particularly heart rate during prospective, ocular manipulation and specifically uniform tension on extra ocular muscles during strabismus surgery.

\*IRB approval from 1992 covered in letter from then IRB chair Dr. Judith Whitcomb, Anchorage, Alaska (letter 10/2020).\*

Detailed description: Patients with ocular manipulation including those scheduled for strabismus surgery will have peri-operative variables monitored before, during and after uniform traction on extra ocular muscles (EOM). The oculocardiac reflex (OCR) will be elicited by quantified (200 gram, 10-second, square-wave) traction on Jameson muscle hook under insertion of an extra ocular muscle (EOM, rectus). Stable pre-tension heart rate, and greatest change heart rate will be recorded. Additional variables to be recorded: birthdate, gender, race, weight, iris color, pre-operative neurodevelopmental conditions, pre-operative medications, induction medications, expired carbon dioxide (CO2) levels, exhaled gas concentrations, anticholinergic medications, opioids, muscle relaxants, type of airway and the number of EOM operated.

Eligibility criteria: Inclusion Criteria:

* Patient scheduled for ocular manipulation and tension on extra ocular muscles and strabismus surgery

Exclusion Criteria:

* anophthalmia

Primary outcomes:
measure: Percent heart rate resulting from oculocardiac reflex
timeFrame: 30 seconds
Secondary outcomes:
measure: Anesthetic interventions
timeFrame: 2 hours
measure: Patient Characteristics
timeFrame: 2 hours
measure: Surgeon Interventions
timeFrame: 2 hours
Other outcomes:
Locations:
city: Anchorage
country: United States
facility: Alaska Children's EYE & Strabismus
state: Alaska
Study officials:
affiliation: Alaska Blind Child Discovery
name: Robert W Arnold, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Arnold RW, Biggs RE, Beerle BJ. Intravenous dexmedetomidine augments the oculocardiac reflex. J AAPOS. 2018 Jun;22(3):211-213.e1. doi: 10.1016/j.jaapos.2018.01.016. Epub 2018 May 5.
citation: Arnold RW. The human heart rate response profiles to five vagal maneuvers. Yale J Biol Med. 1999 Jul-Aug;72(4):237-44.
citation: Stump M, Arnold RW. Iris color alone does not predict susceptibility to the oculocardiac reflex in strabismus surgery. Binocul Vis Strabismus Q. 1999;14(2):111-6.
citation: Arnold RW, Farah RF, Monroe G. The attenuating effect of intraglossal atropine on the oculocardiac reflex. Binocul Vis Strabismus Q. 2002;17(4):313-8.
citation: Machida CJ, Arnold RW. The effect of induced muscle tension and fatigue on the oculocardiac reflex. Binocul Vis Strabismus Q. 2003;18(2):81-6.
citation: Arnold RW, Jensen PA, Kovtoun TA, Maurer SA, Schultz JA. The profound augmentation of the oculocardiac reflex by fast acting opioids. Binocul Vis Strabismus Q. 2004;19(4):215-22.
citation: Arnold RW, Bond AN, McCall M, Lunoe L. The oculocardiac reflex and depth of anesthesia measured by brain wave. BMC Anesthesiol. 2019 Mar 14;19(1):36. doi: 10.1186/s12871-019-0712-z.
citation: Arnold RW, Bond AN. Does Topical Proparacaine Improve Postoperative Comfort After Strabismus Surgery? Clin Ophthalmol. 2019 Nov 20;13:2279-2283. doi: 10.2147/OPTH.S230498. eCollection 2019.
citation: Arnold RW. The Oculocardiac Reflex: A Review. Clin Ophthalmol. 2021 Jun 24;15:2693-2725. doi: 10.2147/OPTH.S317447. eCollection 2021.
citation: Arnold RW, Jansen S, Seelig JC, Glasionov M, Biggs RE, Beerle B. Anesthetic Impacts on the Oculocardiac Reflex: Evidence from a Large, Observational Study. Clin Ophthalmol. 2021 Mar 5;15:973-981. doi: 10.2147/OPTH.S300860. eCollection 2021.
citation: Schumacher AC, Ball ML, Arnold AW, Grendahl RL, Winkle RK, Arnold RW. Oculocardiac Reflex During ROP Exams. Clin Ophthalmol. 2020 Dec 4;14:4263-4269. doi: 10.2147/OPTH.S288043. eCollection 2020.
citation: Arnold RW, Rinner AR, Arnold AW, Beerle BJ. The Impact of Re-Operation, Relatives and Race on the Oculocardiac Reflex During Strabismus Surgery. Clin Ophthalmol. 2020 Dec 3;14:4253-4261. doi: 10.2147/OPTH.S288578. eCollection 2020.