Methods and devices for reducing pressure
The disclosure provides device and related methods that can be used to treat edema by applying pressure to a blood vessel such as a jugular vein to restrict flow therein, creating a local decrease in blood pressure within the jugular vein near an outlet of a lymphatic duct, causing lymph to drain from the interstitium.
1. A method of draining lymph, the method comprising:
restricting flow through a jugular vein of a patient affected by heart failure or edema by applying pressure to a neck of the patient at a spot on the neck proximal to the jugular vein with a medical device for treating edema, the medical device comprising:
an extended collar member dimensioned to extend at least partway around the neck,
a screw threaded through a portion of the collar member, and
a projection provided by a tip of the screw protruding inward from an inner surface of the collar member and positioned to press against the spot on the neck,
wherein the method includes twisting a head of the screw when the extended collar member is disposed about the neck of the patient to drive the projection into the neck to restrict flow within the jugular vein, thereby decreasing pressure at an outflow of a lymphatic duct.
2. The method of claim 1 , further comprising imaging at least a portion of the jugular vein with a medical imaging instrument and using the imaging while applying the pressure to the spot on the neck.
3. The method of claim 1 , further comprising restricting flow through the jugular vein by applying, with the projection, pressure to the jugular vein.
4. The method of claim 3 , wherein restricting the flow through the jugular vein creates a local decrease in pressure within the jugular vein near the outlet of a lymphatic duct.
5. The method of claim 1 , wherein the extended collar member forms a neck cuff that fastens around the neck.
6. The method of claim 1 , wherein the extended collar member includes a C-shaped semi-ring that extends about halfway around the neck.
7. A method of draining lymph, the method comprising:
creating, within a jugular vein, a local decrease in pressure near an outlet of a lymphatic duct by applying pressure to a neck of the patient at a spot on the neck proximal to the jugular vein using a medical device for treating edema, wherein the device includes:
an extended collar member dimensioned to extend at least partway around the neck,
a screw threaded through a portion of the collar member, wherein a tip of the screw provides a projection protruding inward from an inner surface of the collar member, the projection positioned to press against the spot on the neck,
wherein the method includes twisting a head of the screw when the collar member is disposed about the neck of the patient to drive the projection into the neck to restrict flow within the jugular vein, thereby causing lymph to drain from interstitium and into a venous system of a patient.
8. The method of claim 7 , wherein the extended collar member forms a neck cuff that fastens around the neck.
9. The method of claim 7 , wherein the extended collar member includes a C-shaped semi-ring that extends about halfway around the neck.