| abstract |
An assembly of circuitry and display means for use in producing a readout value as a diagnostic aid in medicine comprises:(a) a pen-like hollow elongate outer housing;(b) an electrically conductive socket at one end of said housing, suitable to receive the outer end of at least one detachable test member capable when contacted with a physiological test liquid of producing an electrical signal correlating with a physiological parameter to which the test member is selectively sensitive and,(c) a digital read-out window towards the other end of said housing for exhibiting a numerical value corresponding to the parameter. |