A semi-automatic blood pressure recorder.
نویسنده
چکیده
IN the recent past a number of blood pressure recorders for clinical use, and especially during anaesthesia, have been described (Molyneux and Pask, 1953; Simpson, 1956). It seemed, however, that these recorders had several disadvantages and that there was a place for an instrument that was cheap, simple and not a possible source of an explosion when used in the vicinity of explosive anaesthetic agents, provided that this could be done without too great a sacrifice of efficiency. The instrument (fig. 1) described below enables records of systolic blood pressure to be obtained at frequent intervals though it is in fact sphyg-motonographic in principle. It is also probably simple and cheap enough to be used alone as an aid to the taking of routine blood pressures during anaesthesia. By means of an inflating device a single blood pressure cuff with a brachial stethoscope beneath is inflated to a predetermined but variable level. Oxygen from the anaesthetic machine is used for this purpose. The oxygen escapes through two holes, one of fixed size, the other variable so as to achieve a more or less linear fall of pressure. On hearing the Korotkov sounds the operator reinflates the cuff and the cycle is repeated. The inflator is designed to be operated by the foot, thus freeing the hands for the giving of the anaesthetic or for performing such other manoeuvres as one wishes, for example , signalling events upon the recording drum. The cuff inflator is contained in a brass box measuring 16 x 8 x 8 cm. The lid is detachable and carries the operating pedal which works in a plain bearing lubricated, as are all moving parts, with a noninflammable grease. A rubber washer ensures an airtight fit between the lid and the box, as do fibre washers beneath the heads of the securing screws. It works as follows: Depression of the foot pedal opens the oxygen tap. The tap is a modified M.I.E. injector sucker
منابع مشابه
A study of instruments in preparation for a blood pressure survey of children.
In preparation for the measurement of blood pressure in children of a total geographic community, several preliminary studies of the validity and reliability of various methods and instruments for indirect blood pressure measurements were performed. These studies included Graeco-Latin Square designs, examination of children in a field setting, and assessments of the replicability of reading aut...
متن کاملComparison of the automated Dinamap blood pressure monitor with the mercury sphygmomanometer for detecting hypertension in the day case pre-assessment clinic
Patients will be rejected from surgery by nurse-led pre-assessment clinics and will need to be assessed by their general practitioners if their blood pressure is higher than a pre-determined value. We have assessed the accuracy of the Dinamap automatic blood pressure recorder compared with manual mercury sphygmomanometry for detecting pre-operative hypertension in the day case preassessment cli...
متن کاملAmbulatory blood pressure recordings. Reproducibility and unpredictability.
The accuracy of blood pressure readings taken by the portable semiautomatic blood pressure recorder Remler M 2000 was investigated in 101 unselected, untreated volunteers. On the average, pressures recorded during usual daily activities were lower by approximately 10 mm Hg than pressures measured in the office. However, individual ambulatory pressures could not be predicted from office readings...
متن کاملAmbulatory blood pressure monitoring.
IN this issue Pickering and Harshfield review the use of invasive and noninvasive arterial blood pressure monitoring in ambulant humans. Their review is well balanced and comprehensive but is limited to the discussion of patients with hypertension. Although it is true that the Framingham Study, the Hypertension Detection and Follow-up Program, and the insurance industry data all show the powerf...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- British journal of anaesthesia
دوره 29 1 شماره
صفحات -
تاریخ انتشار 1957