ABSTRACT
BACKGROUND: Midodrine has been used in the intensive care unit (ICU) setting to reduce the time to vasopressor discontinuation. The limited data supporting midodrine use have led to variability in the pattern of initiation and discontinuation of midodrine. OBJECTIVES: To compare the effectiveness and safety of 2 midodrine discontinuation regimens during weaning vasopressors in critically ill patients. METHODS: A retrospective cohort study was conducted at King Abdulaziz Medical City. Included patients were adults admitted to ICU who received midodrine after being unable to be weaned from intravenous vasopressors for more than 24 hours. Patients were categorized into two subgroups depending on the pattern of midodrine discontinuation (tapered dosing regimen vs. nontapered regimen). The primary endpoint was the incidence of inotropes and vasopressors re-initiation after midodrine discontinuation. RESULTS: The incidence of inotropes or vasopressors' re-initiation after discontinuation of midodrine was lower in the tapering group (15.4%) compared with the non-tapering group (40.7%) in the crude analysis as well as regression analysis (odd ratio [OR] = 0.15; 95% CI = 0.03, 0.73, P = 0.02). The time required for the antihypertensive medication(s) initiation after midodrine discontinuation was longer in patients who had dose tapering (beta coefficient (95% CI): 3.11 (0.95, 5.28), P = 0.005). Moreover, inotrope or vasopressor requirement was lower 24 hours post midodrine initiation. In contrast, the two groups had no statistically significant differences in 30-day mortality, in-hospital mortality, or ICU length of stay. CONCLUSION AND RELEVANCE: These real-life data showed that tapering midodrine dosage before discontinuation in critically ill patients during weaning from vasopressor aids in reducing the frequency of inotrope or vasopressor re-initiation. Application of such a strategy might be a reasonable approach among ICU patients unless contraindicated.
Subject(s)
Midodrine , Adult , Humans , Midodrine/adverse effects , Retrospective Studies , Critical Illness/therapy , Vasoconstrictor Agents , Hospitalization , Intensive Care UnitsABSTRACT
BACKGROUND Therapeutic plasma exchange (TPE) is an extracorporeal method of filtration indicated in several conditions, including myasthenia gravis (MG). The removal and replacement of plasma through TPE affect the level of coagulation factors, suggesting alterations in homeostasis. TPE also has the potential to remove medications from the plasma. Insufficient data are available that evaluate the effect of TPE on certain medications, such as unfractionated heparin (UFH). CASE REPORT We report a case of a 78-year-old woman with MG. She underwent a thymectomy complicated by phrenic nerve injury and respiratory failure, requiring admission to the Intensive Care Unit (ICU) and mechanical ventilation. She developed a provoked left upper extremity deep venous thrombosis and started on therapeutic UFH with a target activated partial thromboplastin time (aPTT) of 50 to 80 seconds. Despite being on immunosuppressants, additional therapy with TPE was deemed necessary for her MG exacerbation. Therefore, she received 5 sessions of TPE, given every other day. Interestingly, while on TPE therapy, the aPTT increased significantly after each administration, with TPE reaching >170 seconds in some instances. As a precautionary measure, heparin infusion was held for 1 day based on the institutional heparin protocol and the physician's decision. Fortunately, the patient did not develop any bleeding complications. CONCLUSIONS TPE treatment may temporarily deplete the coagulation factors, leading to supratherapeutic aPTT levels. UFH dose adjustment and frequent assessment of aPTT levels are essential during TPE treatment to minimize serious bleeding complications. Future studies with a larger sample size are required to focus on understanding the effect of TPE on medications.
Subject(s)
Myasthenia Gravis , Plasma Exchange , Female , Humans , Aged , Heparin/therapeutic use , Critical Illness/therapy , Plasmapheresis , Myasthenia Gravis/drug therapyABSTRACT
Calcium channel blockers (CCBs) are widely prescribed medications for various clinical indications in adults and children. They are available in both immediate and long-acting formulations and are generally classified into dihydropyridines and nondihydropyridines, with nondihydropyridines having more cardioselectivity. CCB toxicity is common given the widespread use which leads to serious adverse clinical outcomes, especially in children. Severe CCB toxicities may present with life-threatening bradycardia, hypotension, hyperglycemia, and renal insufficiency. Dihydropyridine toxicity, however, may present with reflex tachycardia instead of bradycardia. Initial patient evaluation and assessment are crucial to identify the severity of CCB toxicity and design the best management strategy. There are different strategies to overcome CCB toxicity that requires precise dosing and close monitoring in various patient populations. These strategies may include large volumes of IV fluids, calcium salts, high insulin euglycemia therapy (HIET), and vasopressors. We hereby summarize the evidence behind the management of CCB toxicity and present a practical guide for clinicians to overcome this common drug toxicity.
ABSTRACT
Apixaban and rivaroxaban require lead-in dosing for 7 and 21 days, respectively, when treating venous thromboembolism (VTE). However, no evidence exists to support subtracting parenteral anticoagulation days from total lead-in dosing. A multicenter study was conducted, including adult patients with acute VTE who received apixaban or rivaroxaban. The patients were grouped as follows. The recommended group received oral lead-in anticoagulant for the full recommended duration. The mixed group received lead-in therapy as parenteral with oral anticoagulant. The incidence of recurrent VTE (rVTE) and major bleeding (MB) within 90 days were the main outcomes. Of the 368 included patients, 47.8% received apixaban, and 52.2% received rivaroxaban. The recommended lead-in was used in 296 patients (80.4%), whereas 72 (19.6%) received the mixed-lead-in regimen. Five patients had rVTE events within 90 days; two occurred during hospitalization in the recommended group versus none in the mixed group (0.7% vs. 0.0%; p = 1.000). After discharge, two events occurred in the recommended group and one in the mixed group (0.7% vs. 1.4%; p = 0.481). In terms of MB, 24 events occurred in 21 patients within 90 days. During hospitalization, 11 events occurred in the recommended group and seven in the mixed group (3.7% vs. 9.7%; p = 0.060). After discharge, five more events occurred in the recommended group and one in the mixed group (1.4% vs. 1.7%; p = 1.000). The mixed-lead-in regimen is safe and effective in comparison with the recommended-lead-in regimen.
ABSTRACT
BACKGROUND Fusarium spp. is a rare cause of opportunistic life-threatening fungal infections. It has a remarkably high resistance profile with few effective antifungal agents, mostly limited to voriconazole and liposomal amphotericin B. Drug-induced liver injury (DILI) by 1 of these 2 antifungal agents further complicates the management of these infections. CASE REPORT A 38-year-old woman with short bowel syndrome presented to the hospital with concerns of abdominal pain and loose stools. An abdominal CT was negative for inflammatory or ischemic bowel disease, and there was no evidence of liver disease. She tested positive for SARS-CoV-2 and required transfer to the ICU due to hypotension requiring fluid resuscitation and vasopressors. On day 43 of her admission, the patient developed a low-grade fever, for which she underwent central-line and peripheral-blood cultures that were positive for Fusarium dimerum. The central line was removed and i.v. voriconazole started. After 3 days of treatment, the patient's liver enzymes rose abruptly. Voriconazole was discontinued and replaced with liposomal amphotericin B, and the liver enzymes improved significantly. The patient completed 14 days of therapy and was discharged from the hospital. CONCLUSIONS This is a case of F. dimerum infection followed by DILI from voriconazole treatment. Her infection was resolved after switching to liposomal amphotericin B, with improvement in liver enzymes on day 1 after discontinuing voriconazole. This observation demonstrates that altering antifungal classes may be an appropriate strategy when confronted with DILI.
