Medical devices; Medical devices, namely, medical temperature monitoring devices; Sheaths specially adapted for medical guidewires; Transseptal needles; Medical devices for cardiac procedures, namely, devices that facilitate the ablation of biologic tissues; Medical devices for use in surgery, namely, surgical devices for separating biologic tissue; Medical devices, namely, percutaneous sheath introducers for introducing medical devices into arteries, veins, the heart or the pericardial space for diagnostic or therapeutic procedures; Medical devices, namely, oesophageal temperature probes and thermistors