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Ординатура / Офтальмология / Английские материалы / Retinal Pharmacotherapy_Rodrigues, Nguyen, Farah_2010.pdf
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24h after treatment

 

Follow-up (90 days)

Figure 46.5  Changes in visual acuity in lines ETDRS in 10 eyes with diabetic maculopathy treated with membrane differential filtration.3

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Rheopheresis can reduce rheologically relevant plasma proteins such as LDL cholesterol and triglycerides and also improve microcirculatory impairment.20 In combination with laser coagulation against ischemic retinopathy, rheopheresis treatment can help to restore and activate or stabilize the functional reserve of the retina at microcirculatory levels (Figures 46.5–46.7).

CENTRAL RETINAL VEIN OCCLUSION

With a prevalence of between 0.1% and 0.4%, CRVO is one of the most common causes of visual loss in adults over 40 years.22 Risk factors for CRVO are hypertension, diabetes, and glaucoma.23

The Central Retinal Vein Occlusion Study (CVOS) found that the visual outcome for enrolled patients was largely dependent on initial visual acuity. Patients who had poor visual acuity (<20/200) were shown to have an 80% chance of a final acuity score of less than 20/200 on their final visit.23,24

Therapeutic options are still rare and most surgical and medical interventions bring with them a high risk of complications.23

Several random clinical trials have proposed hemodilution as a therapeutic option for CRVO. The rationale for the use of hemodilution is based on observations of increased plasma viscosity and increased hematocrit and fibrinogen levels in some patients with CRVO. The reduction of hematocrit, fibrinogen, and plasma viscosity may lead to improved retinal microcirculation.22

Rheopheresis has the immediate effect of simultaneously eliminating a defined spectrum of high-molecular-weight rheologically relevant plasma proteins, resulting in the pulsed reduction of plasma and whole-blood viscosity.1,6–9 Serial pulses of plasma protein elimination, reducing plasma viscosity, can result in sustained improvement to the microcirculation.1,2,4,6–11 Therefore, the chances of reperfusion and an improvement in visual acuity, even from low initial levels, are high (Figures 46.8–46.10).

UVEAL EFFUSION SYNDROME

Figure 46.6  Changes in visual acuity in lines ETDRS in 11 patients

 

 

with diabetic maculopathy treated with membrane differential

Uveal effusion syndrome is a rare disease that largely affects middle-

filtration (MDF) for 18 weeks.21

aged male subjects. The onset is spontaneous and the progression of

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Figure 46.7  Changes in visual acuity in lines ETDRS in patients with diabetic maculopathy and treated with rheopheresis twice a year. Initial visual acuity: right eye (OD) 20/200, left eye (OS) 5/100; last visual acuity: OD 20/80, OS 20/63.

Surgery and Pharmacotherapy • 5 section

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Apheresis) Therapeutical (Rheopheresis; otherapy• 46 rchapteRh

Figure 46.8  Central retinal vein occlusion in a 54-year-old man; decrease in visual acuity in right eye since 8 weeks; visual acuity 20/200.

Figure 46.9  Follow-up after 27 months: Right eye after 18 rheopheresis treatments over a period of 12 months and laser coagulation 8 weeks after first visit. Visual acuity 20/25.

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Figure 46.10  Central retinal vein occlusion in a 54-year-old man. Change of visual acuity in lines (ETDRS); initial visual acuity 0.1, current visual acuity 0.8.

the disease is slow, often leading to bilateral serous choroidal detachment and concomitant retinal detachment, shifting subretinal fluid and, in severe cases, total loss of visual acuity. Retinal holes or breaks cannot be found.25–27

Resistance to steroid treatment25 and surgical intervention28 in a number of cases is a major problem and the natural course often shows a long-term detachment, leading to an atrophy of the choroid and the pigment epithelium, which even after reattachment does not allow good functional results.25,27

Even in 1977 Paulmann and Heimann raised the question of the influence decreased microcirculation could have on maintenance of the detachment. They tried vascular dilatators and steroids combined with plasma expander, which led to improvement of visual acuity without recurrence.28 Later, Brunner et al. published the successful use of therapeutic apheresis on uveal effusion syndrome resistant to steroid application.25

Therefore, we treated patients with idiopathic uveal effusion syndrome with repetitive therapeutical apheresis. Figures 46.11–46.13 show the case of a 43-year-old man with total serous choroidal detachment and concomitant serous amotio retinae in the left eye, which was completely resolved after treatment.

Complications

Rheopheresis is among the therapeutical apheresis procedures (doublefiltration plasmapheresis) that have been performed to high technical

Figure 46.11  Uveal effusion syndrome in a 43-year-old man. OS before repetitive therapeutic apheresis with complete serous choroidal detachment; visual acuity: hand movement.

Figure 46.12  OS after start of repetitive therapeutic apheresis with partial reattachment of the choroidea; visual acuity: 20/125.

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