In:
Journal of Cataract and Refractive Surgery, Ovid Technologies (Wolters Kluwer Health), Vol. 48, No. 3 ( 2022-03), p. 317-321
Abstract:
To investigate the effects in cataract surgery using local anesthesia along with a 30% low-concentration nitrous oxide (N 2 O) anesthesia compared with local anesthesia only. Setting: Saneikai Tsukazaki Hospital. Design: Retrospective, consecutive study. Methods: Patients who underwent bilateral cataract surgery were enrolled. 37 patients using room air inhalation (Air group) and 45 patients using 30% low-concentration N 2 O anesthesia (70% oxygen, total 6 L/min) at surgery start (N 2 O group) were retrospectively reviewed. Systolic blood pressure (BPs), diastolic blood pressure (BPd), and heart rate (HR) at surgery start and end, and mean intraoperative oxygen saturation (% SpO 2 ) were examined. Immediately following surgery, a questionnaire using the Visual Analog Scale score was done to determine intraoperative pain, anxiety, memory, and nausea. Results: No systemic symptoms in all patients and ocular complications requiring treatment were observed. For the N 2 O and air groups, changes in BPs were −5.38 ± 11.07( P = .01) and 1.27 ± 13.61 mm Hg, and HR were −2.24 ± 6.76 and 0.89 ± 5.18 bpm ( P = .001), respectively; intraoperative SpO 2 was 99.05% ± 0.74% and 97.44% ± 1.31% ( P 〈 .001), intraoperative anxiety was 21.76 ± 23.2 and 37.17 ± 32.79 ( P = .002), and intraoperative memory was 55.24 ± 36.8 and 68.91 ± 33.81 ( P = .01), respectively. No patients experienced intraoperative nausea. There was no statistically difference in BPd ( P = .47) and intraoperative pain ( P = .62). Conclusions: Low-concentration N 2 O anesthesia may not cause respiratory depression, abnormal vital signs, or nausea in cataract surgery. It can suppress intraoperative anxiety and memory and decrease and stabilize vital signs.
Type of Medium:
Online Resource
ISSN:
0886-3350
,
1873-4502
DOI:
10.1097/j.jcrs.0000000000000749
Language:
English
Publisher:
Ovid Technologies (Wolters Kluwer Health)
Publication Date:
2022
