Abstract: A self-contained, battery powered, hand-held transmitter usable with mono or bipolar needle electrodes to sense electrochemical nerve impulses as transmitted through the nervous system and muscles of humans and animals. The hand-held transmitter is of miniaturized, generally rectangular form and comprises electronics developing and transmitting a VHF signal receivable by conventional FM receiver means. Being wireless, the transmitter avoids the possible signal distortions and restrictions of patient and physician movements which are inherent when using cable interconnections between electromyographic sensors and associated analytical equipment.

Abstract: A sheath and stand for one-handed use by a health care user of a medical needle such as a hypodermic needle or a medical electrode, wherein the stand is configured with an aperture or socket for receiving the distal end or tip of the sheath and with hook means at the proximate end of the stand which is engageable with the lip of a collar at the proximate end of the sheath to firmly retain the sheath on the stand. The sheath is readily removable from the stand after a used medical needle is reinserted in the sheath by slight axial withdrawal of the sheath to disengage its tip from the socket followed by pivotal movement of the tip upwardly to disengage the hook means on the stand from the lip on the sheath.

Abstract: Means for safely handling medical needles such as needle electrodes, also known as surgical probes, and hypodermic needles. The needle handler can remove the needle for use and return the used needle to its sheath for disposal using only one hand, thereby avoiding any risk of inadvertent penetration of the used needle point in the other hand. The needle sheath is retained in fixed position in a stand or the like at the handler's work station and the sheath and stand are designed to render the sheathed needle readily installable in and removable from the stand by single-handed manipulation.