Investigation of Hemodynamic Changes in the Ophthalmic Artery using Color Doppler Imaging after Strabismus Surgery

Nam-Ho Lee; Su-Na Lee

doi:10.3341/kjo.2005.19.3.208

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Lee and Lee: Investigation of Hemodynamic Changes in the Ophthalmic Artery using Color Doppler Imaging after Strabismus Surgery

Original Article

Korean J Ophthalmol 2005;19(3):208-212.

Published online: 21 December 2005

DOI: https://doi.org/10.3341/kjo.2005.19.3.208

Investigation of Hemodynamic Changes in the Ophthalmic Artery using Color Doppler Imaging after Strabismus Surgery

Nam-Ho Lee, MD, Su-Na Lee, MD

Department of Ophthalmology, Chungnam National University College of Medicine, Daejeon, Korea

Reprint requests to Su-Na Lee, MD. Department of Ophthalmology, Chungnam National University Hospital, College of Medicine, #640 Daesa-dong, Jung-gu, Daejeon 301-721, Korea. Tel: 82-42-220-7604, Fax: 82-42-255-3745, E-mail: irismd@cnuh.co.kr

^∗ The authors had no commercial or proprietary interest in the material used in this study.

Received 18 February 2005 Accepted 14 July 2005

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Purpose

We investigated hemodynamic changes in the ophthalmic artery (OA) using color Doppler imaging (CDI) after two horizontal rectus muscles surgery.

Methods

Eyes of the surgical group (n=18) underwent surgery on two horizontal rectus muscles, and the control group was the contralateral eyes. CDI of the OA was performed before operation and on postoperative days (POD) 1, 7 and 30. Peak systolic (Vmax), end diastolic (Vmin), and mean (Vmean) blood flow velocities were measured, and resistivity index (RI) and pulsatility index (PI) were calculated.

Results

Vmax, Vmin and Vmean were significantly higher, and RI and PI were significantly lower in the surgical group than in the control group on POD 1 (p<0.05). In the surgical group, Vmax, Vmin and Vmean were significantly higher, and RI and PI were significantly lower, on POD 1 than those mesured on other days (p<0.05).

Conclusions

We showed that surgery on the two horizontal rectus muscles increased OA blood flow during the early postoperative period.

Keywords: Anterior ciliary artery, Color Doppler imaging, Hemodynamic change, Ophthalmic artery, Strabismus

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Fig. 1.

Color Doppler waveform of the ophthalmic artery showing initial steep systolic velocity rise (curved arrow)7 and notched “incisure” in middownslope (arrowhead). Only such waves were selected to measure the blood ﬂow velocity parameters. The highest Value of the wave is the peak systolic blood ﬂow velocity (long straight arrow) and the lowest value of the wave is the end diastolic blood ﬂow velocity (short straight arrow).

Fig. 2.

The Change of peak systolic (Vmax), end diastolic (Vmin) and mean (Vmean) blood ﬂow in the ophthalmic artery in both groups with the lapse of time. ∗2 significantly different compared to the values measured at other examination times in the surgical group.

Fig. 3.

The change of resistivity index (RI) and pulsatility index (P1) in the ophthalmic artery in both groups with the lapse of time.∗: significantly different compared to the values calculated at other examination times in the surgical group.

Table 1.

Demographics Of the subjects

	Surgical grout)	Control group
Number of eves	18
Male: Female	10:8
Right: Left	7:11	11:7
Mean age (Years)	25.22+165
Age range (Years)	7~56

Table 2.

Comparison of mean (&#xB001SD) preoperative and postoperative blood flow velocity parameter in the ophthalmic artery between surgical and control groups

Parameter		Preoperation	POD 1	POD 7	POD 30
vmax	Surgical group	43.33±7.16	54.91±6.49	43.78±6.79	42.84±9.44
	Control group	44.01+8.76	44.52+9.23	43.35±8.91	44.62±8.19
	p-Value	0.72	0.00^∗	0.74	0.42
Vmin	Surgical group	8.63±1.16	13.74±1.43	8.61±1.18	8.91±1.59
	Control group	17.50±3.25	22.61±3.18	16.86±3.11	16.83+3.77
	p-Value	0.52	0.00^∗	0.74	0.96
Vmean	Surgical group	16.76±3.86	22.61±3.18	16.86±3.11	16.83±3.77
	Control group	17.50±325	17.18±2.82	17.06±353	17.14±3.25
	group p-Value	0.52	0.00^∗	0.74	0.96
RI	Surgical group	0.79±0.04	0.74±0.04	0.79±0.04	0.78±0.05
	Control group	0.79±0.05	0.80±0.04	0.79±0.04	0.80±0.06
	p-Value	0.61	0.00^∗	0.74	0.31
PI	Surgical group	2.08±031	1.83±0.27	2.11±0.38	2.06±056
	Control group	2.0±0.36	2.07±0.39	2.02±0.31	2.09±0.36
	p-Value	0.56	003^∗	0.4	0.72

^∗ statistically significant difference between surgical and control group

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