Abstract: Novel catheters are disclosed herein having multiple body components operatively configured to slideably and sealably interact with one another.

Abstract: In intravenous fluid injection wherein a syringe needle and surrounding sheath are inserted into a vein so that blood flows through the needle into a transparent hollow push-pull element fixed on the needle remote from its point to indicate proper vein insertion, and the needle is then withdrawn from the sheath and from a vial on the end of the sheath through an opening in the vial so that blood back-flows into the vial before intravenous fluid is introduced through the vial and sheath into the vein, apparatus for preventing blood leakage from the vial opening wherein the opening is covered with an elastomeric diaphragm through which the needle is initially pierced and which resiliently self-seals when the needle is withdrawn therefrom, and further wherein intravenous fluid is introduced through a port in the vial separate from the opening covered by the diaphragm, the vial having a substantially fixed volume which remains substantially unchanged during operation, so that upon withdrawal of the needle from th

Abstract: In an intravenous catheter wherein a syringe needle and surrounding sheath are inserted into a vein so that blood flows through the needle into a transparent hollow push-pull element fixed on the needle remote from its point to indicate proper vein insertion, and the needle is then withdrawn from the sheath and from a vial on the end of the sheath so that blood back-flows into the vial before intravenous fluid is introduced through a side port in the vial into the vein, the vial opening being covered with an elastomeric diaphragm through which the needle is initially pierced and which self-seals when the needle is withdrawn therefrom, the improvement of a protective enclosure for the needle wherein a housing attachable to the vial surrounds the push-pull element so that the point of the needle is enclosed within that housing when the needle is withdrawn through the diaphragm.

Abstract: A laryngoscope instrument for visual inspection of the laryngeal region of the oral cavity; including a bent blade of refractory material for insertion through a mouth and into the throat an outward end of the blade being bifurkated with an opaque shield between, the two tongues thus formed, one tongue aligning with an eyepiece for observation therethrough, and the other tongue aligning with an electric lamp for illuminating the observed region.