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S Arsene

Publications and source records attributed to S Arsene.

7 recordsLinked to original sources
PubMed2004

[Post operative Enterococcus faecalis endophthalmitis: three case report].

We report three cases of endophthalmitis following cataract extraction. Enterococcus faecalis was the causative organism in all of them. Initial visual acuity was only light perception in all cases, final visual acuity was negative light perception in two cases, and light perception in one case. After initial improvement, inflammation was exacerbated in one patient and evisceration realized. The capsular bag was examined using scanning electron microscopy and it was shown that enterococci were adherent to the capsular bag, four months after the onset of the infection. Enterococcus faecalis can be the causative agent both of an acute and a chronic form of post operative endophthalmitis. Experimental studies on rabbit eyes could explain the poor prognosis of these endophtalmitis and focused on bacterial toxins. The contamination appears to be post operative, because Enterococcus faecalis is not a commensal agent of the conjunctiva. So we have to inform our patients about some hygienic habits, to prevent from this devastating complication of cataract surgery.

Aged↗
PubMed2000

Initial color Doppler findings in retinal vein occlusion.

PURPOSE: We assessed early hemodynamic characteristics of various types of retinal vein occlusion using color Doppler imaging and spectral analysis. METHODS: We measured the maximum systolic and diastolic blood flow velocities and the resistance index (RI) in the central retinal artery and the maximum and minimum blood flow velocities in the central retinal vein of affected eyes and contralateral unaffected eyes in 102 adults (63 men and 39 women; mean age, 61 +/- 14.6 years) who presented with retinal vein occlusion. Sixty-three control subjects (27 men and 36 women; mean age, 50 +/- 22.1 years) were also investigated. RESULTS: No significant differences in hemodynamic characteristics were found between the control subjects' eyes and the patients' unaffected eyes. In the 18 cases of ischemic central retinal vein occlusion, the mean diastolic arterial flow velocity (p = 0.005) and venous flow velocity (p < 0.04) were lower and the mean RI was higher (p = 0. 0002) in the affected eyes than in the unaffected contralateral eyes. In the 51 cases of nonischemic central retinal vein occlusion, the mean diastolic arterial flow velocity (p < 0.0001) and venous flow velocity (p < 0.0001) also were lower and the mean RI (p < 0.0001) was higher in the affected eyes than in the unaffected contralateral eyes. These variables were different in the ischemic versus nonischemic types of central retinal vein occlusion. In the 33 cases of branch retinal vein occlusion, no significant differences were observed in arterial or venous blood flow velocities in the affected versus unaffected eyes. The mean RI in the affected eyes was significantly higher (p = 0.009) in patients with central versus branch retinal vein occlusion. CONCLUSIONS: These results suggest that previous arterial disorders were not involved in the pathogenesis of central retinal vein occlusion in these patients. The findings also support the value of Doppler imaging and spectral analysis in the diagnosis and evaluation of retinal vein occlusion and confirm the involvement of arterial flow in venous occlusion.

Adult↗
PubMed1999

Hemianopsia related to dissection of the internal carotid artery.

Spontaneous dissection of the internal carotid artery is typically associated with cerebral vascular infarction along the anterior and middle cerebral distribution, whereas occipital infarction is usually related to posterior circulation abnormalities. Hemianopsia with occipital infarction related to carotid artery dissection has therefore rarely been reported. A 40-year-old woman in whom acute-onset hemianopsia developed, related to occipital infarction secondary to internal artery dissection, is described. This atypical association is explained by anatomic variations of the posterior part of the circle of Willis. Neuroimages showed occipital infarction related to internal carotid artery dissection associated with hypoplasia of the proximal portion of the cerebral posterior artery (P1). The anatomic correlation of this atypical association and a review of the literature are presented.

Adult↗
PubMedDate not supplied

Doppler assessment of hemodynamic changes after hemodilution in retinal vein occlusion.

PURPOSE: We assessed the usefulness of color Doppler imaging and spectral analysis in monitoring the effect of isovolemic hemodilution on retinal vein occlusion. METHODS: Color Doppler imaging was used to measure the systolic and diastolic blood flow velocities and the resistance index (RI) in the central retinal artery and the maximum and minimum blood flow velocities in the central retinal vein of affected eyes and contralateral unaffected eyes before and 1 day after isovolemic hemodilution in 70 adults (40 men and 30 women; mean age, 62.4 +/- 13.7 years) who presented with retinal vein occlusion. RESULTS: With hemodilution, the hematocrit value was decreased from 41.8 +/- 3.0 to 33.0 +/- 3.0. In central retinal vein occlusion, the pretreatment arterial and venous flow velocities of affected eyes were significantly lower than those of unaffected eyes. After hemodilution in eyes affected by ischemic occlusion, a significant improvement in the RI in the central retinal artery was observed without changes in venous flow velocity. After hemodilution in eyes affected by non-ischemic occlusion, a significant increase in maximal venous flow velocity only was noted. In branch retinal vein occlusion, no significant difference was observed in the RI between affected and unaffected eyes. After hemodilution, an improvement in RI was noted only for affected eyes. CONCLUSIONS: The present results confirm the potential value of Doppler analysis in monitoring the impact of hemodilution on arterial and venous velocity in patients with central retinal vein occlusion.

Adult↗