View clinical trials related to Vitamin K Deficiency.
Filter by:The goal of this multicentric observational study was to compare four vitamin K dosing regimens in exclusively breastfed healthy term newborns. The main questions it aims to answer were: - comparing protein induced by vitamin K absence (PIVKA) levels in the different prophylaxis protocols at 48 hours, 1 month and 4 months - to investigate the compliance and safety of oral vitamin K 1 administration Participants received vitamin K prophilaxis according to birth Hospital regimen. A blood sample was taken at 48 hours, 1 month and 3 months of life. Plasmatic PIVKA-II concentretion was be dosed Researchers compared four groups of Vitamin K dosing regimens: 1. an intramuscolar injection of 1 mg vitamin K at birth 2. an intramuscolar injection of 1 mg vitamin K at birth followed by 50 μg/die orally from the second to the fourteenth week of life. 3. an intramuscolar injection of 1 mg vitamin K at birth followed by 150 μg/die orally from the second to the fourteenth week of life. 4. an oral dose of 2 mg vitamin K at birth, followed by a second dose at 4 weeks, and a third dose at 12 weeks to see if there is PIVKA-II plasmatic concentration differences.
Chronic kidney disease (CKD) patients have an increased cardiovascular risk with corresponding cardiovascular calcifications. CKD patients exhibit a functional vitamin K deficiency. Calcification can be prevented by vitamin K intake. The aim of this study is to investigate the cause for the vitamin K deficiency beyond a diminished dietary vitamin K uptake.
For patients with large head and neck tumors the recommended treatment, in many cases, is a combination of extensive surgery and postoperative radiotherapy. The surgical procedure involves resection of the tumor and reconstruction with a so called microvascular free flap, i.e. tissue transferred from for instance the arm or leg to the resection site. Complications of this complex procedure include, but are not limited to, bleeding and blood cloths (thrombosis) in the transferred tissue (free flap), which can cause very serious complications including need for further surgery and loss of the flap. Routine blood tests can measure parts of the system that regulates bleeding and the forming of blood clots, the so called coagulation system, but these tests don't cover the whole system. There are however more advanced instruments, such as ROTEM, rotational thromboelastometry, which provide a more global view of the hemostatic potential of whole blood. ROTEM is one of few more advanced assays that can be analyzed in emergency situations in major hospitals. Other more advanced coagulation assays are thrombin generation and measurements of specific coagulation factors, several of which are vitamin K dependent. Vitamin K is essential in the coagulation system and also involved in many other physiological processes. Deficiency of this vitamin is common, but not well studied in patients undergoing head an neck free flap surgery. The investigators plan to study ROTEM and other above mentioned coagulation parameters in patients undergoing major head and neck surgery including microvascular free flap reconstruction to assess if these parameters can help predict patients at risk for bleeding or flap thrombosis. Further on this could hopefully enable prevention of complications and improve treatment of coagulation complications that still occur.
The study objective is to estimate a maintaining daily dose of Jarlsberg cheese in healthy pre-menopausal women obtaining an increase in the osteocalcin level of at least 10% after 6 weeks on maximum efficacy dose (MED) of Jarlsberg cheese. 1.4: Population and sampling The study population consists of Healthy Voluntary (HV) women between 20 years and pre-menopausal age. The study will be performed as a one-dimensional, within-patient, 3-level Response Surface Pathway (RSP) designed trial with individually adjustment of the dose. Each design period will be 3 weeks. Only HVs obtaining an increase in the osteocalcin level ≥ 10% from baseline after 6 weeks on the MED of 57g Jarlsberg cheese daily will be offered to participate in this de-escalation study.
Critically ill patients with spontaneously prolonged pro-thrombin time, where administration of intravenous administration of phytomenadione (vitamin K) has been ordered by the treating physician will be identified. After signed informed consent baseline samples will be collected. Phytomenadione will be given and 24 hours after administration new blood samples will be collected. Several different advanced coagulation and vitamin K-assays will be performed before and 24 hours after vitamin K administration.
The proposed study will seek to evaluate the prevalence and the progression of vascular calcification in a cohort of maintenance hemodialysis patients in Asian population. It will also evaluate the efficacy of vitamin K 2 supplementation in reducing the progression of vascular calcification in this group of patients. This will be a single-center randomized, prospective and open-label interventional clinical trial of end stage renal failure patients on hemodialysis.Primary outcome will be absolute difference in coronary artery calcium (CAC) score at 18-month between control and intervention arms. Secondary outcomes will be to compare absolute difference in aortic valve calcification, percentage of patients with regression of coronary artery calcification of at least 10%, absolute difference in aortic and systemic arterial stiffness, mortality from any cause and major adverse cardiovascular events (MACE) over the same period.