ECG Monitor, Diascope

Accession #: 2008034

Description: S&W (Simonsen & Weel). An early Electrocardiograph or ECG monitor (identified in the USA as an EKG because the term ECG can be confused with an EEG when spoken). The device featured an electrically isolated input to protect patients from the risk of electrocution and a filter circuit extended up to radiofrequency levels to minimise the effect of RF interference from diathermy machines in operating theatres. The cathode ray tube (CRT) display had a short decay phosphor, persistence of the trace being obtained by repeatedly refreshing the display from a digital memory circuit. Though it exploited digital technology, it was the forerunner of modern computer controlled screens. ECG monitors designed for routine monitoring in operating theatres and emergency situations have a truncated frequency response intended to ensure that a trace may be viewed when there is movement or other interference. Poor low frequency response may cause significant distortion of the S-T segment resulting in impaired recognition of ischaemic cardiac conditions. These monitors are best reserved for monitoring rate and rhythm only. Monitoring bandwidth: 0.5 - 50Hz, Diagnostic bandwidth: 0.05 - 100 Hz.

Thecoloured electrode connection clips are designed for connection to three single -use, self-adhesive, silver-silver chloride gel electrodes, arranged in a triangle over the front of the patient's chest - right shoulder, left shoulder and cardiac apex.

Dimensions: 290 x 200 x 125mm.

Acquired: 09/05/2008