US 12,064,393 B2
Device, systems, and methods for prevention of deep vein thrombosis
Bhavya Ramesh Shah, Irving, TX (US)
Filed by Bhavya Ramesh Shah, Irving, TX (US)
Filed on Sep. 1, 2021, as Appl. No. 17/464,183.
Application 17/464,183 is a continuation of application No. 16/048,913, filed on Jul. 30, 2018, granted, now 11,135,128.
Claims priority of provisional application 62/541,784, filed on Aug. 7, 2017.
Prior Publication US 2022/0160575 A1, May 26, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61H 9/00 (2006.01); A61H 1/00 (2006.01); A61H 11/00 (2006.01); A61H 23/00 (2006.01); A61H 23/02 (2006.01)
CPC A61H 9/0092 (2013.01) [A61H 1/00 (2013.01); A61H 9/00 (2013.01); A61H 9/0007 (2013.01); A61H 9/0078 (2013.01); A61H 11/00 (2013.01); A61H 23/02 (2013.01); A61H 2201/0103 (2013.01); A61H 2201/0119 (2013.01); A61H 2201/0157 (2013.01); A61H 2201/0169 (2013.01); A61H 2201/1215 (2013.01); A61H 2201/1238 (2013.01); A61H 2201/164 (2013.01); A61H 2201/165 (2013.01); A61H 2201/169 (2013.01); A61H 2201/50 (2013.01); A61H 2201/5025 (2013.01); A61H 2201/5028 (2013.01); A61H 2201/5043 (2013.01); A61H 2201/5046 (2013.01); A61H 2201/5048 (2013.01); A61H 2201/5051 (2013.01); A61H 2201/5056 (2013.01); A61H 2201/5071 (2013.01); A61H 2201/5097 (2013.01); A61H 2205/06 (2013.01); A61H 2205/102 (2013.01); A61H 2209/00 (2013.01)] 33 Claims
OG exemplary drawing
 
1. A device for preventing deep vein thrombosis (DVT) in a patient, the device comprising:
a cuff configured to fit over the patient's knee;
an applanator coupled to an inside surface of the cuff and located on the cuff so as to be positioned over a back surface of the knee when the cuff is pulled over the knee, the applanator comprising a rigid base and a tissue contacting surface projecting from a surface of the rigid base, wherein said tissue contacting surface has a curved shape and is sized and configured to apply pressure to a back surface of the knee to compress a popliteal vein in a back of the knee when a force is applied to the applanator without damaging a venous valve in the compressed popliteal vein, wherein a diameter of the tissue contacting surface corresponds to a distance between the medial and lateral gastrocnemius muscle behind the knee to concentrate force therebetween;
an expandable member coupled to the applanator for applying a force to the applanator;
a pressure source fluidically coupled to the expandable member and coupled to the cuff;
wherein when the expandable member is expanded it applies a first force to the surface of the rigid base of the applanator which has an area greater than a bottom area of the tissue contacting surface which projects from the base surface in order to increase a second force which is transmitted by the tissue contacting surface of the applanator to the back surface of the knee and causes the popliteal vein to be compressed so as to minimize blood flow through the popliteal vein without damaging a venous valve in the compressed popliteal vein; wherein the base portion comprises a hinge, and the base portion is configured to pivot relative to the hinge when the expandable member is inflating; and
wherein the entire device is configured to be worn on the patient's knee and function while the patient is ambulatory.