A vascular sheath apparatus is used for placement of a medical device through a perforation in a side wall of a patient's blood vessel. An elongated cylindrical sheath has a distal end portion constructed to be received through the blood vessel. An annular expandable sealing device is disposed about the sheath and expandable radially outward beyond the outer surface of the sheath. The sealing device preferably lies generally in a plane oriented at an acute angle to the longitudinal axis of the sheath. A clamp is slidably disposed on the sheath proximally of the sealing device and can slide toward the sealing device so as to sandwich the vessel wall and overlying tissue between the clamp and the expanded sealing device. The sealing device may be either an inflatable balloon or an accordion fold. Other features include the particular geometry of the clamp which makes it especially suited for use in clamping a sheath in place in the femoral artery.
An introducer for use in interventional vascular procedures having a sealing mechanism for closure of a puncture site is disclosed. The introducer has a vessel-engaging component and a sealing component thereon. The vessel-engaging component comprises an elongated filament engaged within a channel in the wall of the introducer. The filament has an expandable part that is changeable from a first configuration to a second, expanded configuration. When the distal end of the introducer is inserted into the lumen of a blood vessel, the expandable part may be inflated. Pulling the introducer through the puncture in a direction opposite the vessel then causes the expandable member to be engaged on the vessel wall at the location of the puncture to provide resistance in pulling the introducer away from the blood vessel. In this way, the vessel-engaging component locates the puncture site. The sealing component comprises an applicator and a plurality of rings comprised of thrombogenic materials such as collagen on the wall of the introducer. The applicator is used to position the rings at the puncture site once it is located with the vessel-engaging component.
Apparatus for injecting fluids into the walls of blood vessels, body cavities, and the like, includes a plurality of laterally flexible needles disposed in a catheter for exit either out the distal end of the catheter or the catheter or through corresponding side openings in the catheter. In the latter case, the terminal ends of the needles would be curved laterally, with each terminal end being positioned in a respective side opening so that when the needles were moved forwardly in the catheter, the terminal ends of the needles would move laterally out the respective openings to pierce a vessel or cavity wall adjacent to which the catheter was positioned. Hilts positioned near the terminal ends of the needles serve to control the depth of penetration of the needles.
Occlusion assembly for sealing openings in blood vessels, consisting of an occlusion element and fixing element to be fitted through the openings in the blood vessel. The fixing element is firmly connected to a retaining element. A locking element engages on the retaining element. This locking element is fitted horizontally against the outside of the blood vessel.
A novel catheter apparatus for use in delivering an anesthetic agent or other fluid medicament to the portion of subcutaneous tissue through which a catheter device has been inserted into a patient, thereby allowing the catheter device to be retracted without causing pain or discomfort to the patient. The catheter device has an indwelling cannula adapted for insertion through subcutaneous tissue into a patient's body. A helical sheath is formed from an elongate band that is wrapped around the cannula in a helical fashion so as to be capable of being positioned within the subcutaneous tissue once the cannula has been inserted into the body. The helical sheath has formed therein a lumen into which the anesthetic agent or other fluid medicament can be delivered via a hub that is connected to the proximal end of the helical sheath. The helical sheath has formed therein a plurality of delivery holes that form a fluid communication path with the lumen. The delivery holes permit the anesthetic agent or fluid medicament to be delivered to the surrounding subcutaneous tissue.
A novel catheter apparatus for use in delivering an anesthetic agent or other fluid medicament to the portion of subcutaneous tissue through which a catheter device has been inserted into a patient, thereby allowing the catheter device to be further manipulated or retracted without causing pain or discomfort to the patient. The catheter device has an indwelling cannula adapted for insertion through subcutaneous tissue into a patient's body. A cylindrical sleeve around the cannula can be positioned within the subcutaneous tissue once the cannula has been inserted into the body. The cylindrical sleeve has formed therein one or more lumens into which the anesthetic agent or other fluid medicament can be delivered via a hub that is connected to the proximal end of the cylindrical sleeve. The cylindrical sleeve has formed therein a plurality of delivery holes that form a fluid communication path with the one or more lumens. The delivery holes permit the anesthetic agent or fluid medicament to be delivered to the surrounding subcutaneous tissue.
