Reed Relays Eliminate Surgical Instruments Left Behind After Surgery

Reed Relays Detect Surgical Instruments


Every year billions of dollars are paid out for malpractice suits against practicing medical doctors. Most of these suits involve medical procedures or operations where a problem occurs during surgery. Since blood is ever abundant during surgery it can obscure the area being worked on. Sponges are used to soak up blood pools to facilitate the surgery. These blood saturated sponges placed between tissue can be left behind after the operation is complete. Of course, many times this gives rise to post surgical complications and sometimes death.  Medical electronic designers have come up with a clever way of detecting these sponges potentially left behind in conjunction with using Standex-Meder's CRF reed relays.

Full application write up:  Operating Rooms Use Reed Relays to Eliminate Instruments Left Behind After Surgery


  • High reliability
  • Ideal RF characteristics
  • Ideal for carrying fast digital pulses with skew rates less than 20 picoseconds
  • Ability to carry RF signals from DC up to 20 GHz (SRF relay-coming soon/request samples today)
  • 50Ω characteristic impedance
  • Switch to shield capacitance <0.5 picofarads
  • Dielectric strength across the contacts 200 volts
  • Contacts dynamically tested
  • Surface mounted
  • Very low profile
  • BGA's available
  • Rugged thermoset over-molded packaging
  • Qual-shield arrangement

Surface Mount Series
Relay SeriesDimensionsIllustration
W4.00.157SRF reed relay for RF
CRFW4.40.173CRF reed relay for RF