PMID- 34727049
OWN - NLM
STAT- MEDLINE
DCOM- 20211222
LR  - 20211222
IS  - 1943-5681 (Electronic)
IS  - 0002-9645 (Linking)
VI  - 83
IP  - 1
DP  - 2021 Nov 1
TI  - Comparison of image quality of corneal and retinal optical coherence tomography 
      using sedation and general anesthesia protocols with or without retrobulbar 
      anesthesia in horses.
PG  - 72-79
LID - ajvr.21.02.0029 [pii]
LID - 10.2460/ajvr.21.02.0029 [doi]
AB  - OBJECTIVE: To compare image quality and acquisition time of corneal and retinal 
      spectral domain optical coherence tomography (SD-OCT) under 3 different 
      sedation-anesthesia conditions in horses. ANIMALS: 6 middle-aged geldings free of 
      ocular disease. PROCEDURES: 1 randomly selected eye of each horse was evaluated 
      via SD-OCT under the following 3 conditions: standing sedation without 
      retrobulbar anesthetic block (RB), standing sedation with RB, and general 
      anesthesia with RB. Five regions of interest were evaluated in the cornea (axial 
      and 12, 3, 6, and 9 o'clock positions) and fundus (optic nerve head). Three 
      diagnostic scans of predetermined quality were obtained per anatomical region. 
      Image acquisition times and total scans per site were recorded. Corneal and 
      retinal SD-OCT image quality was graded on a subjective scale from 0 
      (nondiagnostic) to 4 (excellent). RESULTS: Mean values for the standing sedation 
      without RB, standing sedation with RB, and general anesthesia conditions were 24, 
      23, and 17, respectively, for total cornea scan attempts; 23, 19, and 19 for 
      total retina-scan attempts; 14.6, 13.2, and 9.2 minutes for total cornea scan 
      time; 19.1, 9.2, and 13.0 for total retina scan time; 2.0, 2.3, and 2.5 for 
      cornea grade; and 2.7, 2.9, and 2.5 for retina grade. CONCLUSIONS AND CLINICAL 
      RELEVANCE: The RB facilitated globe akinesia and improved the percentage of scans 
      in frame and region of interest accuracy for retinal imaging via OCT in horses. 
      Retrobulbar blocks improved clinical image acquisition while minimizing motion 
      artifact.
FAU - Hefner, Ethan M
AU  - Hefner EM
FAU - Lin, Hui-Chu
AU  - Lin HC
FAU - Cole, Robert C
AU  - Cole RC
FAU - Moore, Phillip A
AU  - Moore PA
FAU - McMullen, Richard J
AU  - McMullen RJ
LA  - eng
PT  - Journal Article
DEP - 20211101
PL  - United States
TA  - Am J Vet Res
JT  - American journal of veterinary research
JID - 0375011
SB  - IM
MH  - *Anesthesia, General/veterinary
MH  - Animals
MH  - Cornea/diagnostic imaging
MH  - Horses
MH  - Retina/diagnostic imaging
MH  - *Tomography, Optical Coherence/veterinary
EDAT- 2021/11/03 06:00
MHDA- 2021/12/24 06:00
CRDT- 2021/11/02 17:17
PHST- 2021/11/03 06:00 [pubmed]
PHST- 2021/12/24 06:00 [medline]
PHST- 2021/11/02 17:17 [entrez]
AID - ajvr.21.02.0029 [pii]
AID - 10.2460/ajvr.21.02.0029 [doi]
PST - epublish
SO  - Am J Vet Res. 2021 Nov 1;83(1):72-79. doi: 10.2460/ajvr.21.02.0029.