[Impact of COVID-19 on ophthalmology consultations: survey among 35 ophthalmologists]. / Impact du COVID-19 sur la consultation en ophtalmologie en Maroc: enquête auprès de 35 ophtalmologistes.

From an epidemic in December to a global pandemic in early March, COVID-19 arrived on Moroccan soil on March 2nd and ophthalmology consultations decreased considerably. The majority of ophthalmologists come to the fore to ensure continuity of care and emergency care following health regulations. We developed a questionnaire to collect information on the general approach of 35 ophthalmologists regarding the impact of COVID -19 on consultation activities. The results of the survey objectified that 88.57% of the ophthalmologists surveyed maintained their consultation activities; ¾ of them only treated urgent cases or patients whose condition required undelayed management. The majority of ophthalmologists reported a decrease in consultations of at least 90% compared to their standard workflow. Active ophthalmologists believe that the risk of being infected or infecting their patients and others ranges from medium to high in the majority of cases despite protective barrier gestures.

Utility of a blood volume monitor in the management of anemia in dialysis by computing the total hemoglobin mass.

INTRODUCTION: The degree of interdialytic weight gain and ultrafiltration may influence anemia results in dialysis. The purpose of this study is to evaluate the utility of a blood volume monitor (BVM) in the management of renal anemia and its ability to avoid the variability of hematocrit (Hct) and hemoglobin values (Hb) depending on plasma volume through a simple method of monitoring the total hemoglobin mass (MtHb ). METHODS: Predialysis blood samples for measurement were drawn at both the midweek treatment and the beginning-of-the-dialysis-week treatment in 30 patients. The MtHb was calculated as MtHb = Vb × Hb, where Vb is the absolute blood volume determined by online dialysate dilution using an online hemodiafiltration machine incorporating a relative BVM. FINDINGS: The MtHb and the total red cell volume (VRBC ) as measured with the bolus method at the starting of the treatment were 540 ± 148 grams and 1544 ± 339 mL, respectively. There were significant differences between the Hb levels and between the hematocrit levels according to the time of dialysis. However, the MtHb remained constant. There was also an excellent correlation between the Hb measurements by the BVM and the blood sampling method (R = 0.89, P value <0.001). CONCLUSION: Our study suggests that BVM could be very useful in the management of anemia in dialysis by computing the total Hb mass in clinical practice and may support better and more appropriate assessments of the factors influencing circulating Hb.