Extradural Hematoma After Continuous Extradural Anesthesia

We report a case of extradural haematoma occurring after extradural anaesthesia in an anticoagulated patient. The diagnosis was confirmed by magnetic resonance imaging and the haematoma was evacuated surgically. A search of the literature revealed only five previous reports of extradural haematoma in association with extradural anaesthesia.WoSScopu

TITLE: Proposed Values for Remaining "TBD"s in the Draft ANSI Standard, T1.105.09

This contribution proposes values for the three specifications which are "To Be Determined" in T1X1.3/94-001R1. Specifically, the contribution proposes specification for: Synchronization Hardware Re-arrangements, Holdover Recovery, and Hold-in Range for the SONET Minimum Clock. ************************************************************************************** NOTICE This document has been prepared to assist the Standard Committee T1-Telecommunications. It is offered to the Committee as a basis for discussion and is not a binding proposal on AT&T Communications. The requirements presented in this document are subject to change in form and numerical value after more study. AT&T Communications specifically reserves the right to add to, or amend, the statements contained herein. T1X1.3/95-080 1. Introduction This contribution proposes values for the three specifications which are, in the current draft [1], marked "To Be Determined". The following sections provide discussion and prop..

Performance and Test Criteria for DC Fuses in Coal Mine Applications

A comprehensive study was made of dc system parameters in coal mines to recommend performance and test criteria for dc fuses. Field tests were conducted in ten coal mines in which transients were initiated on the dc system from which the parameters of the dc mine electrical power system could be determined. Data processing was done to fit an exponential curve to the field waveforms. From this data analysis finding the dc system resistance, inductance, and time constant was possible. A survey of nationally recognized laboratories was conducted to establish that the recommended test criteria were practical. The development of test criteria for dc fuses used in mines was based on the measurement of parameters in the field, the survey of testing laboratories, literature searches, and laboratory tests. Methods to predict analytically the parameters measured in the field are discussed. A brief laboratory testing program was carried out to verify the practicality of the recommended criteria. Copyright © 1986 by The Institute of Electrical and Electronics Engineers. Inc