[Epistaxis and anticoagulation therapy: an analysis based on health insurance data from Lower Saxony]. / Epistaxis und antithrombotische Medikation: eine Analyse der Daten einer gesetzlichen Krankenversicherung in Niedersachsen.

BACKGROUND: Epistaxis is a common symptom in the medical practice. It is associated with various comorbidities and the use of medications, especially anticoagulants. Despite the high lifetime prevalence, there is limited data on prevalence and possible risk factors. METHODS: The study examines epistaxis care in a large patient population (AOK Lower Saxony) over a ten-year period (2007-2016). Risk factors, age at diagnosis, concomitant medication and comorbidities were analysed and the prevalence in the study period calculated. RESULTS: 162,167 patients visited their doctors between 2007-2016 (308,947 cases). Most patients were treated as outpatients (96.6%) and 54% of patients were men. Over the study period, the prevalence of epistaxis rose by 21% (increase from 8.6 to 9.3 per 1000 insured persons per year) with a comparatively stable prevalence for the inpatient setting (0.2 per 1000 insured persons per year). In 54,105 of all epistaxis cases (17.5%), the use of antithrombotic drugs was recorded (oral anticoagulants: 9.5%). During the study period, increased prescribing of oral anticoagulants (from 7.7% of cases in 2007 to 11.8% in 2016), especially of NOAC was documented (from 0.1% of cases in 2011 to 5.1% in 2016). CONCLUSION: In addition to arterial hypertension, the predominant male sex and the typical age distribution, we found that cases of epistaxis often received anticoagulation therapy. This study showed an increase of epistaxis along with rising prescriptions of NOAC. In contrast, no increase of severe epistaxis cases leading to hospitalization was found.

Quality management in the prophylaxis of venous thrombembolism--results of a survey including 464 medical and surgical patients.

BACKGROUND: We surveyed the quality of risk stratification politics and monitored the rate of entries to our company-wide protocol for venous thrombembolism (VTE) prophylaxis in order to identify safety concerns. PATIENTS AND METHODS: Audit in 464 medical and surgical patients to evaluate quality of VTE prophylaxis. RESULTS: Patients were classified as low 146 (31 %), medium 101 (22 %), and high risk cases 217 (47 %). Of these 262 (56.5 %) were treated according to their risk status and in accordance with our protocol, while 9 more patients were treated according to their risk status but off-protocol. Overtreatment was identified in 73 (15.7 %), undertreatment in 120 (25,9 %) of all patients. The rate of incorrect prophylaxis was significantly different between the risk categories, with more patients of the high-risk group receiving inadequate medical prophylaxis (data not shown; p = 0.038). Renal function was analyzed in 392 (84.5 %) patients. In those patients with known renal function 26 (6.6 %) received improper medical prophylaxis. If cases were added in whom prophylaxis was started without previous creatinine control, renal function was not correctly taken into account in 49 (10.6 %) of all patients. Moreover, deterioration of renal function was not excluded within one week in 78 patients (16.8 %) and blood count was not re-checked in 45 (9.7 %) of all patients after one week. There were more overtreatments in surgical (n = 53/278) and more undertreatments in medical patients (n = 54/186) (p = 0.04). Surgeons neglected renal function and blood controls significantly more often than medical doctors (p-values for both < 0.05). CONCLUSIONS: We found a low adherence with our protocol and substantial over- and undertreatment in VTE prophylaxis. Besides, we identified disregarding of renal function and safety laboratory examinations as additional safety concerns. To identify safety problems associated with medical VTE prophylaxis and "hot spots" quality management-audits proved to be valuable instruments.

Acute tetrachloroethylene poisoning--blood elimination kinetics during hyperventilation therapy.

After ingestion of 12-16 g tetrachloroethylene, a 6-year-old boy was admitted to the clinic in coma. In view of the high initial tetrachloroethylene blood level, hyperventilation therapy was performed. Under this therapeutic regimen, the clinical condition of the patient improved considerably. The tetrachloroethylene blood level profile which was determined under hyperventilation therapy could be computer-fitted to a two-compartment model. Elimination of tetrachloroethylene from the blood compartment occurred via a rapid and a slow process with half-lives of 30 min and 36 hours, respectively. These values compared favourably with the half-lives of 160 min and 33 hours under normal respiratory conditions. During hyperventilation therapy, the relative contribution to the fast elimination process increased from 70% for physiological minute volume to 99.9%. A minor fraction of the ingested dose was excreted with the urine (integral of 1% during the first 3 days). In contrast to previous results, trace amounts of unchanged tetrachloroethylene were detected in the urine besides trichloroacetic acid and trichloroethanol.