# US 11,986,586 B2 · Catheter for chest drainage and chest drainage system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,986,586 B2 - Document ID: US11986586B2 - Status: Granted - Kind: B2 - Application number: 17/477,902 - Filed: 2021-09-17 - Published: 2023-03-23 - Granted: 2024-05-21 - Earliest claimed: 2021-09-17 - Applicants: Naoyuki Ishikita - Inventors: Naoyuki Ishikita - Web page: https://patentgrep.com/patent/US11986586B2 ## CPC - A61M 1/84: {Drainage tubes; Aspiration tips (for negative pressure wound therapy A61M1/90; for surgical cutting instruments A61B17/32)} - A61M 1/85: {with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants (for negative pressure wound therapy A61M1/92, A61M1/94; combined with tracheal tubes A61M16/0463; dental instruments with combined rinsing and aspirating A61C17/0208)} - A61M 1/87: {Details of the aspiration tip, not otherwise provided for} - A61M 13/003: {Blowing gases other than for carrying powders, e.g. for inflating, dilating or rinsing} - A61M 16/00: Devices for influencing the respiratory system of patients by gas treatment, e.g. ventilators (iron lungs A61H31/02); Tracheal tubes - A61M 25/0068: {Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure} - A61M 25/0069: {Tip not integral with tube} - A61M 25/0074: {Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable} - A61M 25/04: in the body, e.g. expansible {(A61M25/10, A61M16/0488 take precedence)} - A61M 27/00: Drainage appliance for wounds or the like {, i.e. wound drains, implanted drains} ({negative pressure wound therapy devices A61M1/90;} implements for holding wound open A61B17/02 {; middle ear drainage A61F11/202}) - A61M 39/0247: {Transcutaneous or percutaneous access sites to the inside of the body} - A61M 16/0078: {Breathing bags} - A61M 16/06: Respiratory or anaesthetic masks - A61M 19/00: Local anaesthesia (syringes therefor A61M5/00); Hypothermia (A61M5/42 takes precedence; cooling blood in a bypass of the arterial system A61M1/36) - A61M 2039/0252: {for access to the lungs} - A61M 2039/0261: {Means for anchoring port to the body, or ports having a special shape or being made of a specific material to allow easy implantation/integration in the body} - A61M 2039/0273: {for introducing catheters into the body} - A61M 2039/0276: {for introducing or removing fluids into or out of the body} - A61M 2202/0208: Oxygen - A61M 2205/3344: Measuring or controlling pressure at the body treatment site - A61M 2210/101: Pleural cavity - A61M 2210/1039: Lungs - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract To reduce the suffering of the patient and enable easier removal of excess fluid such as pleural effusion fluid from the chest space, the disclosure provides a catheter for chest drainage intended for removal of excess fluid from a chest space of a living body and to be placed in the living body in such a manner as to extend from an inside of the chest space to an outside of the living body. The catheter includes a passage member formed of a flexible sheet and having a passage through which the excess fluid is to be drained, and an indwelling member formed of an elastic body and provided at a proximal end of the passage member. The indwelling member has an inlet that allows the excess fluid to flow through. The indwelling member includes a retaining portion spreading in a flange shape and being retainable at a chest wall. ## Claims ### Claim 1 A catheter for chest drainage intended for removal of excess fluid from a chest space of a living body and to be placed in the living body in such a manner as to extend from an inside of the chest space to an outside of the living body, the catheter comprising: a passage member having a passage through which the excess fluid is to be drained; and an indwelling member provided at a proximal end of the passage member, the indwelling member having an inlet that allows the excess fluid to flow through, and a retaining portion having a flange shape and a plate shape facing perpendicular to the passage member at normal times, wherein the passage member is collapsed in a flat sheet-like shape at normal times when the passage member is not used to drain the excess fluid, wherein the retaining portion is formed of an elastic body and is elastically bent to face in a horizontal direction with respect to the passage member and elastically foldable into a sheet while being inserted into the living body, and spreads in a flange shape perpendicularly with respect to the passage member with restoring force exerted by the rubber elastic body forming the retaining portion after being inserted into the living body and is retainable at a chest wall. ### Claim 2 (depends on 1) The catheter for chest drainage according to claim 1, wherein the indwelling member has a groove in a region overlapping at least the inlet. ### Claim 3 (depends on 1) The catheter for chest drainage according to claim 1, wherein the indwelling member further includes a connecting portion connected to the proximal end of the passage member, and wherein the retaining portion spreads in the flange shape with respect to the connecting portion. ### Claim 4 (depends on 2) The catheter for chest drainage according to claim 2, wherein the indwelling member further includes a connecting portion connected to the proximal end of the passage member, and wherein the retaining portion spreads in the flange shape with respect to the connecting portion. ### Claim 5 (depends on 1) The catheter for chest drainage according to claim 1, wherein the indwelling member is made of silicone rubber. ### Claim 6 (depends on 1) The chest drainage system configured to remove the excess fluid from the chest space of the living body, the system comprising: the catheter for chest drainage according to claim 1; and a gas supplying unit configured to generate a positive pressure in lungs of the living body by supplying gas into the lungs. ### Claim 7 (depends on 3) The catheter for chest drainage according to claim 3, wherein a space is provided on the proximal end of the passage member. ### Claim 8 (depends on 3) The catheter for chest drainage according to claim 3, wherein the inlet has a wedge-like sectional shape that is tapered toward the distal end of the connecting portion. ### Claim 9 (depends on 1) The catheter for chest drainage according to claim 1, wherein the retaining portion is disc-shaped. ### Claim 10 (depends on 2) The catheter for chest drainage according to claim 2, wherein the groove is provided in a region overlapping the inlet so that the excess fluid is smoothly introduced into the inlet. ### Claim 11 (depends on 1) The chest drainage method to remove the excess fluid from the chest space of the living body, the method comprising: attaching the catheter according to claim 1 such that the catheter extends from the inside of the chest space of the living body and through the chest wall, and draining the excess fluid from the chest space to the outside of the living body through the catheter by applying a positive pressure to lungs. ### Claim 12 (depends on 1) The catheter for chest drainage according to claim 1, wherein the passage member is formed of a pair of flexible sheets. ### Claim 13 (depends on 12) The catheter for chest drainage according to claim 12, wherein the indwelling member further includes a connecting portion connected to the proximal end of the passage member, wherein the proximal end of each of the pair of flexible sheets is connected to the connecting portion, wherein the inlet opens when the excess fluid flows into the groove, wherein the connecting portion undergoes elastic deformation from a flat shape into a tubular shape when the inlet opens, and wherein the passage opens between the lateral ends of the pair of flexible sheets when the connecting portion undergoes the elastic deformation. ### Claim 14 (depends on 12) The catheter for chest drainage according to claim 12, wherein the pair of flexible sheets forming the passage member is a resin film. ### Claim 15 (depends on 12) The catheter for chest drainage according to claim 12, wherein the pair of flexible sheets is flat at normal times when the passage member is not used to drain the excess fluid. ### Claim 16 (depends on 12) The catheter for chest drainage according to claim 12, wherein the proximal end of the pair of flexible sheets and the indwelling member are to be inserted into the living body. ### Claim 17 (depends on 4) The catheter for chest drainage according to claim 4, wherein a space is provided on the proximal end of the passage member. ### Claim 18 (depends on 4) The catheter for chest drainage according to claim 4, wherein the inlet has a wedge-like sectional shape that is tapered toward the distal end of the connecting portion. ### Claim 19 (depends on 1) The catheter for chest drainage according to claim 1, wherein passage member has a space provided on the proximal end of the passage member, the space serves as an introduction port that introduces a flow of the excess fluid, and the space is tapered toward a distal end side.