Effect of Dialysis Type on Orbital Vascular Flow in Patients with End-Stage Renal Disease

Figures & data

Figure 1.  Doppler spectrum of TPCA from the control group.

Figure 2.  Doppler spectrum of CRA from the control group.

Table 1.  Characteristics of patients and controls.

	HD
	Before HD	After HD	PD	Controls
Number of patients	21		19	40
Age (years)	50		41.3	43.1
Sex (male/female)	12/9		7/12	9/31
Mean systolic BP (mm Hg)	117.6 ± 20.9	104.76 ± 22.4	123 ± 30.2	117 ± 11.14
Mean diastolic BP	72.3 ± 11.3	63.33 ± 7.95	82.5 ± 20.1	73.25 ± 9.71
IOP (for right eye)	13.75 ± 2.14	12.1 ± 1.93	13.05 ± 1.94	13.37 ± 2.30

Note: BP, blood pressure; HD, hemodialysis; IOP, intraocular pressure; PD, peritoneal dialysis.

Table 2.  Mean flow values of the retrobulbar vessels of HD subjects both before and after HD.

		Pre-HD (mean + SD)	Post-HD (mean + SD)	p
TPCA	PSV	19.15 ± 4.77	15.05 ± 3.31	0.003
	EDV	7.75 ± 2.00	5.62 ± 1.77	0.001
	RI	0.61 ± 0.07	0.63 ± 0.07	0.274
CRA	PSV	14.81 ± 2.20	12.00 ± 2.30	<0.001
	EDV	5.72 ± 1.76	4.49 ± 1.48	0.022
	RI	0.64 ± 0.08	0.63 ± 0.07	0.643

Note: CRA, central retinal artery; EDV, end-diastolic flow velocity; PSV, peak systolic flow velocity; RI, resistivity index; TPCA, temporal posterior ciliary artery.

Table 3.  Mean flow values of ocular vessels of PD subjects, HD subjects, and normals.

		Post-HD (mean + SD)	PD (mean + SD)	Normals (mean + SD)
TPCA	PSV	15.05 ± 3.31	19.53 ± 3.07	14.57 ± 2.33
	EDV	5.62 ± 1.77	8.88 ± 2.34	5.97 ± 1.42
	RI	0.63 ± 0.07	0.54 ± 0.08	0.59 ± 0.06
CRA	PSV	12.00 ± 2.30	15.76 ± 2.44	13.06 ± 1.91
	EDV	4.49 ± 1.48	7.11 ± 1.64	5.03 ± 1.31
	RI	0.63 ± 0.07	0.56 ± 0.05	0.62 ± 0.06

Note: CRA, central retinal artery; EDV, end-diastolic flow velocity; HD, hemodialysis, PD, peritoneal dialysis; PSV, peak systolic flow velocity; RI, resistivity index; TPCA, temporal posterior ciliary artery.