'Under pressure': The role of therapeutic drug monitoring in the treatment of hypertension.

Antihypertensive drugs do not qualify as optimal candidates for therapeutic drug monitoring (TDM), given their obvious physiological effect, the absence of a clear relationship between drug concentrations and pharmacodynamic outcomes and their wide therapeutic range. However, since non-adherence is a major challenge in hypertension management, using drug concentrations can be of value to identify non-adherence as a first step towards better blood pressure control. In this article we discuss the key challenges associated with measuring and interpreting antihypertensive drug concentrations that are important when TDM is used to improve non-adherence. Additionally, we elaborate on the role of TDM in optimizing antihypertensive drug treatment besides addressing non-adherence by highlighting its value in specific patient groups with altered pharmacokinetic parameters such as female vs. male or elderly patients.

High-flow Nasal Cannula therapy: A feasible treatment for vulnerable elderly COVID-19 patients in the wards.

BACKGROUND: Invasive mechanical ventilation is the treatment of choice in COVID-19 patients when hypoxemia persists, despite maximum conventional oxygen administration. Some frail patients with severe hypoxemic respiratory failure are deemed not eligible for invasive mechanical ventilation. OBJECTIVES: To investigate whether High-flow nasal cannula (HFNC) in the wards could serve as a rescue therapy in these frail patients. METHODS: This retrospective cohort study included frail COVID-19 patients admitted to the hospital between March 9th and May 1st 2020. HFNC therapy was started in the wards. The primary endpoint was the survival rate at hospital discharge. RESULTS: Thirty-two patients with a median age of 79.0 years (74.5-83.0) and a Clinical Frailty Score of 4 out of 9 (3-6) were included. Only 6% reported HFNC tolerability issues. The overall survival rate was 25% at hospital discharge. CONCLUSIONS: This study suggests that, when preferred, HFNC in the wards could be a potential rescue therapy for respiratory failure in vulnerable COVID-19 patients.

[Home telemonitoring and oxygen therapy in COVID-19 patients: safety, patient satisfaction, and cost-effectiveness]. / Thuisbehandeling van covid-19-patiënten met zuurstof en telemonitoring.

OBJECTIVE: To evaluate the implementation of home telemonitoring and oxygen therapy in COVID-19 patients. Primary outcomes were safety, patient satisfaction, reduction of hospital stay, and cost-effectiveness. DESIGN: Retrospective cohort study. METHOD: All COVID-19 patients who were discharged with home telemonitoring and oxygen therapy between June 1st and November 1st 2020 were included. Eligible patients had a maximum oxygen requirement of 2 liters per minute during the 24 hours prior to discharge with a minimal peripheral oxygen saturation of 94%. A mobile application for telemonitoring was used, which patients or relatives had to be able to use independently. Patient demographics, clinical parameters, data on telemonitoring and readmissions were extracted from the electronic patient records. A survey for patient satisfaction and a cost-effectiveness analysis were performed. RESULTS: Out of 619 admissions, 49 patients were discharged with home telemonitoring and oxygen therapy. Median duration of home oxygen therapy was 11 days with a potential reduction in hospitalization of 616 days. Six patients were readmitted and were significantly more febrile on discharge (67% versus 14%, p=0.01) and had lower oxygenation (95%, (IQR 93-96) versus 96%, (IQR 95-97), p=0.02) with similar levels of oxygen administration. Patient satisfaction was high with a mean score of 5 to 6 on a scale measuring satisfaction from 1 to 7. Estimated total cost reduction was € 146.736. CONCLUSION: This study shows that home telemonitoring and oxygen administration can be safely applied in COVID-19 patients resulting in a high patient satisfaction and reduction in hospital stay and costs.

[Neurological symptoms of hypomagnesemia]. / Neurologische symptomen bij hypomagnesiëmie.

BACKGROUND: An epileptic seizure is a common neurological presentation in the Emergency Department (ED). Electrolyte disturbances are an important cause of neurological symptoms like seizures and hypomagnesemia is one of them. PPI's can cause hypomagnesemia and are readily prescribed. Therefore patients taking PPI's are at risk of developing neurological symptoms due to hypomagnesemia. CASE: A 82-year old woman was seen in ED with a history of nausea, vomiting and vertigo. A vertical nystagmus was observed with attacks of mydriasis followed by a phase of encephalopathy and restlessness. These were recognized as epilepsy. Hypokaliemia, hypocalcemia and a deep hypomagnesemia were present. The PPI accounted for hypomagnesemia. After 2 days of intravenous magnesium suppletion all symptoms disappeared. CONCLUSION: PPI's can cause hypomagnesemia and magnesium levels should be obtained in patients presenting with encephalopathy or atypical neurological symptoms.