# US 2016/0250451 A1 · Methods of using a dual-lumen sheath in intraluminal procedures

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- Number: US 2016/0250451 A1
- Document ID: US20160250451A1
- Status: Published application
- Kind: A1
- Application number: 15/138,127
- Filed: 2016-04-25
- Published: 2016-09-01
- Earliest claimed: 2001-07-13
- Assignees: Endophys Holdings, LLC
- Applicants: Endophys Holdings, LLC
- Inventors: Phillip D. Purdy
- Web page: https://patentgrep.com/patent/US20160250451A1

## CPC

- A61M 25/09041: {Mechanisms for insertion of guide wires}
- A61B 5/14503: {invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors (A61B5/1459, A61B5/1464, A61B5/1473, A61B5/1482, A61B5/14865 take precedence)}
- A61B 5/14532: {for measuring glucose, e.g. by tissue impedance measurement}
- A61B 5/14539: {for measuring pH}
- A61B 5/14542: {for measuring blood gases (A61B5/14551 takes precedence)}
- A61B 5/369: Electroencephalography [EEG]
- A61B 5/6851: {Guide wires}
- A61B 10/02: Instruments for taking cell samples or for biopsy {(A61B10/0038 and A61B10/0045 take precedence; needle locating or guiding means A61B17/3403; samplers for enzymology or microbiology C12M1/26; sampling or preparing biological specimens G01N33/48)}
- A61B 17/12113: {within an aneurysm}
- A61B 17/12136: {Balloons}
- A61B 17/1214: {Coils or wires}
- A61F 7/12: Devices for heating or cooling internal body cavities
- A61M 25/02: Holding devices, e.g. on the body
- A61M 25/0662: {Guide tubes}
- A61M 25/09: Guide wires
- A61M 25/10: Balloon catheters ({A61M25/0125 takes precedence; embolectomy A61B17/22032; retractors A61B17/02;} inflatable balloons for placing stents or stent-grafts A61F2/958 {; stomach balloons for treatment of obesity A61F5/0003; oesophagal tubes A61J15/00})
- A61M 25/1011: {Multiple balloon catheters}
- A61M 39/22: Valves or arrangement of valves {(A61M39/02, A61M39/0247, A61M39/16 take precedence; regulating valves in infusion systems A61M5/16881; in devices worn by the patient for the reception of urine, faeces, catamenial or other discharge, or in colostomy devices A61F5/4405)}
- A61N 1/05: for implantation or insertion into the body, e.g. heart electrode (A61N1/06 takes precedence)
- A61N 5/1002: {Intraluminal radiation therapy}
- A61B 17/122: Clamps or clips, e.g. for the umbilical cord {(for the vas deferens A61F6/206)}
- A61F 7/123: {using a flexible balloon containing the thermal element}
- A61F 2007/126: {for invasive application, e.g. for introducing into blood vessels}
- A61M 25/0021: {characterised by the form of the tubing (A61M25/0054 takes precedence)}
- A61M 25/0029: {characterized by features relating to least one lumen located at the middle part of the catheter, e.g. slots, flaps, valves, cuffs, apertures, notches, grooves or rapid exchange ports (catheter shaft surface irregularities A61M2025/006)}
- A61M 25/0041: {pre-formed, e.g. specially adapted to fit with the anatomy of body channels (urethral catheters A61F2/04)}
- A61M 2025/0002: {with a pressure sensor at the distal end}
- A61M 2025/0007: {Epidural catheters}
- A61M 2025/0034: {characterized by elements which are assembled, connected or fused, e.g. splittable tubes, outer sheaths creating lumina or separate cores}
- A61M 2025/0037: {characterized by lumina being arranged side-by-side}
- A61M 2025/0166: {Sensors, electrodes or the like for guiding the catheter to a target zone, e.g. image guided or magnetically guided}
- A61M 2025/024: {having a clip or clamp system}
- A61M 2025/091: {having a lumen for drug delivery or suction}
- A61M 2210/0693: Brain, cerebrum
- A61M 2210/1003: Spinal column
- 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)}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)
- A61N: ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY (measurement of bioelectric currents A61B; surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body A61B18/00; anaesthetic apparatus in general A61M; incandescent lamps H01K; infrared radiators for heating H05B)

## Abstract

Disclosed are sheaths that comprise a first sheath member having a first passageway, a first length, and a first proximal end defined by a first valve apparatus configured to seal the first passageway, the first passageway having a first passageway diameter at a location in the first passageway; and a second sheath member coupled to the first sheath member, the second sheath member having a second passageway and a second length, the second passageway having a second passageway diameter at a location in the second passageway; where the first passageway and the second passageway are separate from each other and not co-axial, the first length is different from the second length, and the first and second sheath members are positioned beside each other for a portion of their first and second lengths.

## Claims

### Claim 1

A method of navigating a spinal subarchnoid space in a living being, comprising:
percutaneously introducing a device into the spinal subarachnoid space at an entry location, the device having a first passageway sized to slidably receive, and work with, at least a guidewire; and
advancing the device within the spinal subarachnoid space at least more than 10 centimeters from the entry location.