WO2012151751A1 - Bi-lumen tip and uses thereof - Google Patents

Bi-lumen tip and uses thereof Download PDF

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Publication number
WO2012151751A1
WO2012151751A1 PCT/CN2011/073966 CN2011073966W WO2012151751A1 WO 2012151751 A1 WO2012151751 A1 WO 2012151751A1 CN 2011073966 W CN2011073966 W CN 2011073966W WO 2012151751 A1 WO2012151751 A1 WO 2012151751A1
Authority
WO
WIPO (PCT)
Prior art keywords
lumen
fluid delivery
tip
body cavity
suction
Prior art date
Application number
PCT/CN2011/073966
Other languages
French (fr)
Inventor
Lien-Guo DAI
Ya-Hui Chang
Original Assignee
Human Origin Biotechnology Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Human Origin Biotechnology Co., Ltd. filed Critical Human Origin Biotechnology Co., Ltd.
Priority to PCT/CN2011/073966 priority Critical patent/WO2012151751A1/en
Priority to CN201190000979.2U priority patent/CN203564591U/en
Publication of WO2012151751A1 publication Critical patent/WO2012151751A1/en

Links

Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/0021Catheters; Hollow probes characterised by the form of the tubing
    • A61M25/0023Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
    • A61M25/0026Multi-lumen catheters with stationary elements
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/84Drainage tubes; Aspiration tips
    • A61M1/85Drainage tubes; Aspiration tips with gas or fluid supply means, e.g. for supplying rinsing fluids or anticoagulants
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M3/00Medical syringes, e.g. enemata; Irrigators
    • A61M3/02Enemata; Irrigators
    • A61M3/0279Cannula; Nozzles; Tips; their connection means
    • A61M3/0283Cannula; Nozzles; Tips; their connection means with at least two inner passageways, a first one for irrigating and a second for evacuating
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/158Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/0021Catheters; Hollow probes characterised by the form of the tubing
    • A61M25/0023Catheters; Hollow probes characterised by the form of the tubing by the form of the lumen, e.g. cross-section, variable diameter
    • A61M25/0026Multi-lumen catheters with stationary elements
    • A61M25/003Multi-lumen catheters with stationary elements characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves
    • A61M2025/0031Multi-lumen catheters with stationary elements characterized by features relating to least one lumen located at the distal part of the catheter, e.g. filters, plugs or valves characterized by lumina for withdrawing or delivering, i.e. used for extracorporeal circuit treatment
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M25/00Catheters; Hollow probes
    • A61M25/0067Catheters; Hollow probes characterised by the distal end, e.g. tips
    • A61M25/0068Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
    • A61M25/007Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142Pressure infusion, e.g. using pumps
    • A61M5/14212Pumping with an aspiration and an expulsion action
    • A61M5/14228Pumping with an aspiration and an expulsion action with linear peristaltic action, i.e. comprising at least three pressurising members or a helical member
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/31Details
    • A61M5/32Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/329Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles characterised by features of the needle shaft
    • A61M5/3291Shafts with additional lateral openings

Definitions

  • This invention relates to a new and improved bi-lumen tip for use as a head for a suction-irrigation system for removing unwanted materials from a body cavity and delivering fluids thereto.
  • a double lumen tip embodiment of this invention represents a considerable improvement over conventional multiple single lumen catheter insertions.
  • the double lumen irrigation tip of this invention would reduce the possibility of infection at multiple insertion sites since only one incision at the insertion site would be made. It would also be easier to operate since only one tip would be introduced into the body cavity.
  • One object of this invention is to provide an improved suction-irrigation system and a method for sterilely removing unwanted materials from a body cavity and delivering fluids thereto.
  • the present disclosure is directed to a bi-lumen tip for coupling to a suction unit and a fluid delivery unit for the removal of unwanted materials from a body cavity and the delivery of at least one fluid to the body cavity.
  • the bi-lumen tip has a perforated end and a non-perforated end, and includes a drainage lumen and a fluid delivery lumen arranged in parallel and share a common lumen wall within the bi-lumen tip, in which the perforated end is for inserting into the body cavity while the non-perforated end remains outside the body cavity.
  • the draining lumen is coupled to the suction unit, and has a first plurality of perforations on its surface toward the perforated end of the bi-lumen tip for the removal of unwanted materials from the body cavity.
  • the fluid delivery lumen is coupled to the fluid delivery unit, and has a second plurality of perforations on its surface toward the perforated end of the bi-lumen tip for delivering the at least one fluid to the body cavity.
  • the draining lumen and the fluid delivery lumen may be same or different in length.
  • the fluid delivery lumen is coupled to the fluid delivery unit, via optionally connecting through an adapter.
  • the length of the perforated end of the bi-lumen tip for inserting into the body cavity is about 0.3 to 2 inches, preferably about 0.5 to 1.8 inches, more preferably about 0.8 to 1.6 inches, and most preferably about 1.0 inch; whereas there is no particular limitation on the length of the non-tapered open end of the bi-lumen tip.
  • the draining lumen has a cross-section that is larger than that of the fluid delivery lumen; and each of the first plurality of perforations has a cross-section that is larger than that of each of the second plurality of perforations.
  • the present disclosure is directed to a suction-irrigation process for removing unwanted materials from a body cavity and delivering at least one fluid thereto by use of the bi-lumen tip of this invention as described above.
  • the suction-irrigation process includes steps of, constructing a drainage route by inserting the perforated end of the bi-lumen tip into the body cavity and coupling the drainage lumen to the suction unit; constructing a fluid delivery route by connecting the fluid delivery lumen of the bi-lumen tip to the fluid delivery unit; draining the body cavity by withdrawing the unwanted materials from the first plurality of perforations of the drainage lumen of the bi-lumen tip via the constructed drainage rout; and irrigating the body cavity by delivering the at least one fluid through the second plurality of perforations of the fluid delivery lumen of the bi-lumen tip via the constructed fluid delivery route.
  • the fluid delivery lumen of the bi-lumen tip is coupled to the fluid delivery unit, via optionally connecting through an adapter, so as to construct the fluid delivery route.
  • the draining step and the irrigating step are performed alternatively or simultaneously.
  • the fluid delivery unit is a fluid bag, and the fluid is delivered to the body cavity by way of gravity; whereas the suction unit includes a vacuum pump and a fluid reservoir.
  • the fluid delivery unit may further comprise a pump.
  • the present disclosure is directed to an improved suction-irrigation system for use with a suction-irrigation process.
  • the improved suction-irrigation system includes a suction unit for draining unwanted materials from a body cavity; and a fluid delivery unit for delivering at least one fluid to the body cavity.
  • the improvement of the suction-irrigation system includes the bi-lumen tip of this invention, to be used with the afore-described suction-irrigation process.
  • the bi-lumen tip is characterized in having a perforated end for inserting into the body cavity during the suction-irrigation process, and a non-perforated end for connecting to the suction unit and the fluid delivery unit, and includes a drainage lumen and a fluid delivery lumen, arranged in parallel and share a common lumen wall within the bi-lumen tip; and the fluid delivery lumen and the drainage lumen may be same or different in length.
  • the draining lumen is coupled to the suction unit, and has a first plurality of perforations on its surface toward the perforated end of the bi-lumen tip for the removal of unwanted materials from the body cavity.
  • the fluid delivery lumen is coupled to the fluid delivery unit via optionally connecting through an adapter, and has a second plurality of perforations on its surface toward the perforated end of the bi-lumen tip for delivering the at least one fluid to the body cavity.
  • the draining lumen has a cross-section that is larger than that of the fluid delivery lumen.
  • Each of the first plurality of perforations has a cross-section that is larger than that of each of the second plurality of perforations.
  • the fluid delivery lumen further comprises an opening toward the non-perforated end of the bi-lumen tip for receiving an optional adapter, so as to couple the fluid delivery lumen to the fluid delivery unit.
  • the fluid delivery unit is a fluid bag, and the fluid is delivered to the body cavity by gravity; whereas the suction unit includes a vacuum pump and a fluid reservoir.
  • FIG. 1 is a plain view of a suction-irrigation system according to one embodiment of this invention.
  • FIG. 2A is an enlarged view of the suction-irrigation tip assembly according to one embodiment of the present disclosure
  • FIG. 2B is an exploded view of the suction-irrigation tip assembly of FIG. 2A.
  • FIG. 2C is a sectional view of the suction-irrigation tip assembly of
  • FIG. 2A is a diagrammatic representation of FIG. 2A.
  • a suction-irrigation system 100 for simultaneously removing unwanted materials from a body cavity and delivering fluids thereto in accordance with one embodiment of the present disclosure is depicted in FIG. 1.
  • the suction-irrigation system 100 includes a suction-irrigation tip assembly 110, two catheters (140a, 140b), a suction unit 150, and a fluid delivery unit 160.
  • the suction-irrigation tip assembly 110 is composed of a bi-lumen tip 120 and an adapter 130; and the bi-lumen tip 120 has a tapered perforated open end and a non-perforated open end, and includes a drainage lumen and a fluid delivery lumen arranged in parallel, and share a common lumen wall within the bi-lumen tip 120; and the fluid delivery lumen and the drainage lumen may be of the same or different length.
  • the draining lumen is coupled to the suction unit at one end via the catheter 140a, and has a first plurality of perforations on its surface toward the perforated end of the bi-lumen tip for the removal of unwanted materials from the body cavity.
  • the fluid delivery lumen is coupled to the fluid delivery unit at one end via connecting through the adapter, and has a second plurality of perforations on its surface toward the perforated end of the bi-lumen tip for delivering the at least one fluid to the body cavity.
  • one end of the adapter 130 matches with the opening of the fluid delivery lumen, whereas the other end of the adapter 130 matches the size of the catheter 140b.
  • the fluid delivery lumen may be directly coupled to the fluid delivery unit by the catheter 140b (not shown).
  • the tapered perforated open end of the bi-lumen tip 120 is inserted into a body cavity 170 by penetrating the skin 171 of a patient with an aid of a trocar, such that the other non-perforated, non-tapered open end of the tip 120, that is, the end having two separated openings (125, 126) respectively belong to the drainage lumen 121 and the fluid delivery lumen 122, remains outside the body cavity 170 and respectively coupled to the suction unit 150 and the fluid delivery unit 160 via the catheters (140a, 140b) and thereby forming the suction-irrigation system 100 of the present disclosure.
  • the insertion of the tip 120 into the body cavity 170 is achieved by steps as follows.
  • a trocar is used to probe an inflammation site of the body, then the skin 171 above the identified inflammation site or the skin 171 above the body cavity 170, is penetrated by the trocar needle.
  • a guide wire is then introduced into the identified body cavity 170 through the trocar; then the tapered perforated open end of the bi-lumen tip 120 is inserted into the body cavity 170 using the inserted guide wire to guide and position the tip 120 within the body cavity 170, while the non-tapered, non-perforated open end of the bi-lumen tip 120 remains outside the body cavity 170.
  • the body cavity 170 suitable for practicing the suction-irrigation method or system of the present disclosure includes, and is not limited to, peritoneal cavity, chest cavity, abdomina l cavity, thorax cavity, ventricle, joint, or an open wound site after surgery such as chest surgery, urologica l surgery, lung surgery or open heart surgery.
  • FIG. 2A An enla rged view of the suction-irrigation tip assembly 110 is depicted in FIG. 2A, an exploded view of the suction-irrigation tip assembly 110 is depicted in FIG 2B, and a sectional view of the suction-irrigation tip assembly 110 is illustrated in FIG 2C.
  • FIG. 2A illustrates a bi-lumen tip 120 and a n adapter 130 connected thereto.
  • the bi-lumen tip 120 is tapered toward one end with a plurality of perforations on its surface, whereas the other end remains perforation free and has two separate openings.
  • the bi-lumen tip 120 includes a drainage lumen 121 and a fluid delivery lumen 122 arranged to be adjacent to each other a nd share a common lumen wall within the tip, and the fluid delivery lumen 122 and the drainage lumen 121 are different in length.
  • the fluid delivery lumen 122 is preferably shorter in length compared with that of the d rainage lumen 121.
  • the dra inage lumen 121 is open at both ends (125, 127), a nd have a plurality of perforations 123 on its surface for the removal of unwanted materia ls from the body cavity 170.
  • the fluid delivery lumen 122 has only one open end 126 and a plura lity of perforations 124 on its surface for the delivery of fluids to the body cavity 170. I n this example, during suction-irrigation process, one end of the adapter 130 is inserted into the opening 126 of the fluid delivery lumen 122, whereas the other end of the adapter 130 may be fitted into the catheter 140b and thereby coupling the fluid delivery lumen 122 to the fluid delivery unit (not shown).
  • the opening 125 of the drainage lumen may be fitted into the catheter 140a and thereby coupling the drainage lumen 121 to the suction unit (not shown).
  • the fluid delivery lumen 122 may be coupled to the fluid delivery unit by a connecting catheter without the aid of an adaptor.
  • the two lumens of the bi-lumen tip 120 are respectively coupled to the suction unit 150 and the fluid delivery unit 160.
  • the drainage lumen 121 of the bi-lumen tip 120 is coupled to the suction unit 150 through catheter 140a, so as to form a suction route for continuously withdrawing unwanted materials such as fluids, cell or tissue debris, blood or blood clots out of the body cavity 170.
  • the suction unit 150 is a negative pressure system and is comprised of a fluid reservoir 151 and a suction pump 152.
  • suction pump 152 Upon activating the suction pump 152, unwanted materials within the body cavity 170 are pulled through the plurality of perforations 123 located on the outer surface of lumen 121 due to the negative pressure generated by the suction pump 152, these unwanted materials then traveled through catheter 140a and are collected in a fluid reservoir 151.
  • the arrow illustrated in the suction unit 150 indicates the suction direction generated by the suction pump 152, such that materials from the body cavity are drawn continuously and trapped in the fluid reservoir 151.
  • the fluid delivery lumen 122 of the bi-lumen tip 120 may be coupled to the fluid delivery unit 160 through catheter 140b via connecting through the catheter adapter 130, so as to form a fluid delivery route for delivering a fluid such as a saline or a medical fluid to the body cavity 170.
  • the fluid delivery unit 160 is a positive pressure system.
  • the fluid delivery unit 160 is a fluid bag 161 hanged on a drip stand such that the fluid is delivered to the body cavity 170 by gravity.
  • the fluid delivery unit 160 may further comprise a pump for drawing the fluid out of its container and deliver to the body cavity via the connecting catheter.
  • a fluid within the fluid bag 161 is sent through catheter 140b due to gravity or the positive pressure generated by the optional fluid delivery pump, the fluid eventually exits from the plurality of perforations 124 located on the outer surface of the fluid delivery lumen 122 and into the body cavity 170.
  • the respective pressure generated by the suction unit 150 and the fluid delivery unit 160 may be adjusted so that the unwanted materials and the fluid are respectively transported through the system 100 in the same or different velocity, which may depend on the actual need of the irrigation process.
  • the fluid delivery unit 160 may optionally comprise a valve for adjusting the flow rate of the fluids. Any skilled technician or physician may adjust the respective pressure required for the suction unit 150 and the fluid delivery unit 160 without undue experimentation.
  • Suitable examples for a suction pump or a fluid delivery pump may include, but are not limited to, a vacuum pump and a peristaltic pump.
  • a peristaltic pump is employed as the suction pump or the optional fluid delivery pump.
  • Suitable fluid in the fluid bag 161 includes, but is not limited to, a saline or a medical fluid which contains therein an effective amount of a therapeutic agent such as an antibiotic, an anti-inflammation agent or an anti-viral agent for sterilizing and preventing the body cavity from infection.
  • a therapeutic agent such as an antibiotic, an anti-inflammation agent or an anti-viral agent for sterilizing and preventing the body cavity from infection.
  • At least one fluid may be employed when practicing the method and/or system of the present disclosure.
  • a saline may be delivered to the body cavity first, followed by a medical fluid, such as a fluid containing antibiotics.
  • saline and the medical fluid may be delivered in alternative or in any desirable sequence, and the sequence may be repeated for any desirable times, depends on the therapeutic regime ordered by the attending physician of the patient.
  • the suction route and the fluid delivery route may be established simultaneously or sequentially.
  • the suction route and the fluid delivery route are established simultaneously, in which the fluid delivery unit 160 and the suction pump 152 are activated simultaneously such that the body cavity 170 is washed with a saline or a medical fluid through the delivery route while unwanted materials and the spent fluid are withdrawn out of the body cavity and trapped in the fluid reservoir 151.
  • the suction route is established first so that the body cavity is relatively free of unwanted materials before the fluid delivery route is established and saline and/or medical fluid is delivered there to.
  • the bi-lumen tip 120 is preferably made of a polymeric material such as thermal-setting plastics or thermal plastics and the like.
  • the adapter 130 may be made of the same material as that of the bi-lumen tip 120.
  • the perforated end of the bi-lumen tip 120 may be about 0.3 to 2 inches in length, such as about 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 or 2.0 inches in length.
  • the perforated end of the bi-lumen tip 120 may be about 0.5 to 1.8 inches in length; more preferably, about 0.8 to 1.6 inches in length; and most preferably about 1.0 inch in length.
  • the length of bi-lumen tip that remains outside the body cavity 170 that is, the non-perforated, non-tapered open end of the bi-lumen tip 120
  • the fluid delivery lumen and the drainage lumen may be of the same or different length.
  • the bi-lumen tip 120 preferably may have a round cross-section that is about 1/8, 3/16 or 1/4 inch in diameter.
  • the bi-lumen tip 120 may be flattened into an elliptical or oval shape, provided that fluid communication is maintained between the bi-lumen tip and the body cavity.
  • the two lumens of the bi-lumen tip 120 may have a size that is same or different.
  • the size of the drainage lumen 121 for withdrawing unwanted materials from the body cavity is larger than that of the fluid delivery lumen 122 for fluid delivery purpose.
  • the drainage lumen 121 and the fluid delivery lumen 122 are of same size.
  • the perforations (123, 124) along the outer surfaces of the respective lumens (121, 122) may be round in shape; or any other suitable shape, as long as it allows fluid communication between the body cavity and the bi-lumen tip 120.
  • the perforations 123 on the outer surface of the drainage lumen 121 may be of the same size with those on the outer surface of the fluid delivery lumen 122.
  • the perforations 123 on the outer surface of the drainage lumen 121 are larger in size than those on the outer surface of the fluid delivery lumen 122.
  • the round perforations 123 on the outer surface of the drainage lumen 121 may be about 1 to 5 mm in diameter, such as 1, 2, 3, 4 or 5 mm in diameter; whereas the round perforations 124 on the outer surface of the fluid delivery lumen 122 may be about 1 to 3 mm in diameter, such as 1, 2 or 3 mm in diameter.
  • the bi-lumen tip of the present disclosure provides a unique and useful product for use with conventional irrigation system and/or method for conditions where drainage of unwanted materials and delivery of medical fluids are required with a minimum of complications.
  • the bi-lumen tip having first and second lumens may be tapered toward one end and is bifurcated at the other end, such that the two lumens of the bi-lumen tip share a common lumen wall at the perforated end and remain separated at the bifurcated end.
  • the perforated end of the bi-lumen tip is inserted into a body cavity of a patient, whereas the bifurcated end, in which the two lumens remain separated, is coupled to the suction unit and the fluid delivery unit respectively through suitable catheters, and thereby forming an irrigation system for removing unwanted materials from the body cavity and delivering fluids thereto.

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hematology (AREA)
  • Public Health (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Vascular Medicine (AREA)
  • Biophysics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Surgery (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • External Artificial Organs (AREA)

Abstract

A suction-irrigation system (100) having a bi-lumen tip (120) respectively coupled to a suction unit (150) and a fluid delivery unit (160) for removing unwanted materials from a body cavity (170) and delivering fluids thereto is provided. The bi-lumen tip (120) has a perforated end for inserting the bi-lumen tip (120) into the body cavity (170) and a non-perforated end for coupling the bi-lumen tip (120) to the suction unit (150) and the fluid delivery unit (160). The bi-lumen tip (120) includes a drainage lumen (121) and a fluid delivery lumen (122); the two lumens (121, 122) are arranged in parallel and share a common lumen wall within the bi-lumen tip (120). The drainage lumen (121) is coupled to the suction unit (150), and has a first plurality of perforations (123) on its surface for the removal of unwanted materials from the body cavity (170). The fluid delivery lumen (122) is coupled to the fluid delivery unit (160) via optionally connecting through an adapter (130), and has a second plurality of perforations (124) on its surface for delivering the at least one fluid to the body cavity (170). The respectively first and second perforations (123, 124) of the drainage lumen (121) and the fluid delivery lumen (122) are disposed on part of the surface of the perforated end of the bi-lumen tip (120).

Description

BI-LUMEN TIP AND USES THEREOF
BACKGROUND OF THE INVENTION
[0001 ] 1. FIELD OF THE INVENTION
[0002] This invention relates to a new and improved bi-lumen tip for use as a head for a suction-irrigation system for removing unwanted materials from a body cavity and delivering fluids thereto.
[0003] 2. DESCRIPTION OF RELATED ART
[0004] In conventional irrigation process, multiple single lumen tubes or catheters are introduced into a body cavity, either via a trocar or by surgical methods, the multiple single lumen tubes are then respectively coupled to suction devices to remove fluids or tissue debris from the body cavity and deliver fluids thereto. Each tube or catheter is placed at one insertion site via making one incision to the skin above the body cavity, however, each insertion site represents a potential source of would infection. Hence, it would be desirable to reduce the number of skin incisions and a corresponding reduction in the risk of infection while suction and irrigation conducted at the body cavity continues.
[0005] A double lumen tip embodiment of this invention represents a considerable improvement over conventional multiple single lumen catheter insertions. The double lumen irrigation tip of this invention would reduce the possibility of infection at multiple insertion sites since only one incision at the insertion site would be made. It would also be easier to operate since only one tip would be introduced into the body cavity. SUMMARY
[0006] One object of this invention is to provide an improved suction-irrigation system and a method for sterilely removing unwanted materials from a body cavity and delivering fluids thereto.
[0007] In one aspect, the present disclosure is directed to a bi-lumen tip for coupling to a suction unit and a fluid delivery unit for the removal of unwanted materials from a body cavity and the delivery of at least one fluid to the body cavity. The bi-lumen tip has a perforated end and a non-perforated end, and includes a drainage lumen and a fluid delivery lumen arranged in parallel and share a common lumen wall within the bi-lumen tip, in which the perforated end is for inserting into the body cavity while the non-perforated end remains outside the body cavity. The draining lumen is coupled to the suction unit, and has a first plurality of perforations on its surface toward the perforated end of the bi-lumen tip for the removal of unwanted materials from the body cavity. The fluid delivery lumen is coupled to the fluid delivery unit, and has a second plurality of perforations on its surface toward the perforated end of the bi-lumen tip for delivering the at least one fluid to the body cavity. The draining lumen and the fluid delivery lumen may be same or different in length.
[0008] According to one embodiment of the present disclosure, the fluid delivery lumen is coupled to the fluid delivery unit, via optionally connecting through an adapter.
[0009] According to one embodiment of the present disclosure, the length of the perforated end of the bi-lumen tip for inserting into the body cavity is about 0.3 to 2 inches, preferably about 0.5 to 1.8 inches, more preferably about 0.8 to 1.6 inches, and most preferably about 1.0 inch; whereas there is no particular limitation on the length of the non-tapered open end of the bi-lumen tip.
[0010] According to one embodiment of the present disclosure, the draining lumen has a cross-section that is larger than that of the fluid delivery lumen; and each of the first plurality of perforations has a cross-section that is larger than that of each of the second plurality of perforations.
[001 1 ] In another aspect, the present disclosure is directed to a suction-irrigation process for removing unwanted materials from a body cavity and delivering at least one fluid thereto by use of the bi-lumen tip of this invention as described above. The suction-irrigation process includes steps of, constructing a drainage route by inserting the perforated end of the bi-lumen tip into the body cavity and coupling the drainage lumen to the suction unit; constructing a fluid delivery route by connecting the fluid delivery lumen of the bi-lumen tip to the fluid delivery unit; draining the body cavity by withdrawing the unwanted materials from the first plurality of perforations of the drainage lumen of the bi-lumen tip via the constructed drainage rout; and irrigating the body cavity by delivering the at least one fluid through the second plurality of perforations of the fluid delivery lumen of the bi-lumen tip via the constructed fluid delivery route.
[0012] According to one embodiment of the present disclosure, the fluid delivery lumen of the bi-lumen tip is coupled to the fluid delivery unit, via optionally connecting through an adapter, so as to construct the fluid delivery route. [0013] According to one embodiment of the present disclosure, the draining step and the irrigating step are performed alternatively or simultaneously.
[0014] According to another embodiment of the present disclosure, the fluid delivery unit is a fluid bag, and the fluid is delivered to the body cavity by way of gravity; whereas the suction unit includes a vacuum pump and a fluid reservoir. In one example, the fluid delivery unit may further comprise a pump.
[0015] In a further aspect, the present disclosure is directed to an improved suction-irrigation system for use with a suction-irrigation process. The improved suction-irrigation system includes a suction unit for draining unwanted materials from a body cavity; and a fluid delivery unit for delivering at least one fluid to the body cavity. The improvement of the suction-irrigation system includes the bi-lumen tip of this invention, to be used with the afore-described suction-irrigation process. The bi-lumen tip is characterized in having a perforated end for inserting into the body cavity during the suction-irrigation process, and a non-perforated end for connecting to the suction unit and the fluid delivery unit, and includes a drainage lumen and a fluid delivery lumen, arranged in parallel and share a common lumen wall within the bi-lumen tip; and the fluid delivery lumen and the drainage lumen may be same or different in length. The draining lumen is coupled to the suction unit, and has a first plurality of perforations on its surface toward the perforated end of the bi-lumen tip for the removal of unwanted materials from the body cavity. The fluid delivery lumen is coupled to the fluid delivery unit via optionally connecting through an adapter, and has a second plurality of perforations on its surface toward the perforated end of the bi-lumen tip for delivering the at least one fluid to the body cavity. [0016] According to one embodiment of the present disclosure, the draining lumen has a cross-section that is larger than that of the fluid delivery lumen. Each of the first plurality of perforations has a cross-section that is larger than that of each of the second plurality of perforations. The fluid delivery lumen further comprises an opening toward the non-perforated end of the bi-lumen tip for receiving an optional adapter, so as to couple the fluid delivery lumen to the fluid delivery unit. In one example, the fluid delivery unit is a fluid bag, and the fluid is delivered to the body cavity by gravity; whereas the suction unit includes a vacuum pump and a fluid reservoir.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The present description will be better understood from the following detailed description read in light of the accompanying drawings, wherein:
[0018] FIG. 1 is a plain view of a suction-irrigation system according to one embodiment of this invention;
[0019] FIG. 2A is an enlarged view of the suction-irrigation tip assembly according to one embodiment of the present disclosure;
[0020] FIG. 2B is an exploded view of the suction-irrigation tip assembly of FIG. 2A; and
[0021 ] FIG. 2C is a sectional view of the suction-irrigation tip assembly of
FIG. 2A.
[0022] Like reference numerals are used to designate like parts in the accompanying drawings. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0023] The detailed description provided below in connection with the appended drawings is intended as a description of the present examples and is not intended to represent the only forms in which the present example may be constructed or utilized. The description sets forth the functions of the example and the sequence of steps for constructing and operating the example. However, the same or equivalent functions and sequences may be accomplished by different examples.
[0024] A suction-irrigation system 100 for simultaneously removing unwanted materials from a body cavity and delivering fluids thereto in accordance with one embodiment of the present disclosure is depicted in FIG. 1. The suction-irrigation system 100 includes a suction-irrigation tip assembly 110, two catheters (140a, 140b), a suction unit 150, and a fluid delivery unit 160. The suction-irrigation tip assembly 110 is composed of a bi-lumen tip 120 and an adapter 130; and the bi-lumen tip 120 has a tapered perforated open end and a non-perforated open end, and includes a drainage lumen and a fluid delivery lumen arranged in parallel, and share a common lumen wall within the bi-lumen tip 120; and the fluid delivery lumen and the drainage lumen may be of the same or different length. In the depicted example, the draining lumen is coupled to the suction unit at one end via the catheter 140a, and has a first plurality of perforations on its surface toward the perforated end of the bi-lumen tip for the removal of unwanted materials from the body cavity. The fluid delivery lumen is coupled to the fluid delivery unit at one end via connecting through the adapter, and has a second plurality of perforations on its surface toward the perforated end of the bi-lumen tip for delivering the at least one fluid to the body cavity. Specifically, one end of the adapter 130 matches with the opening of the fluid delivery lumen, whereas the other end of the adapter 130 matches the size of the catheter 140b. Alternatively, the fluid delivery lumen may be directly coupled to the fluid delivery unit by the catheter 140b (not shown).
[0025] During suction and irrigation process, the tapered perforated open end of the bi-lumen tip 120 is inserted into a body cavity 170 by penetrating the skin 171 of a patient with an aid of a trocar, such that the other non-perforated, non-tapered open end of the tip 120, that is, the end having two separated openings (125, 126) respectively belong to the drainage lumen 121 and the fluid delivery lumen 122, remains outside the body cavity 170 and respectively coupled to the suction unit 150 and the fluid delivery unit 160 via the catheters (140a, 140b) and thereby forming the suction-irrigation system 100 of the present disclosure. Specifically, the insertion of the tip 120 into the body cavity 170 is achieved by steps as follows. A trocar is used to probe an inflammation site of the body, then the skin 171 above the identified inflammation site or the skin 171 above the body cavity 170, is penetrated by the trocar needle. A guide wire is then introduced into the identified body cavity 170 through the trocar; then the tapered perforated open end of the bi-lumen tip 120 is inserted into the body cavity 170 using the inserted guide wire to guide and position the tip 120 within the body cavity 170, while the non-tapered, non-perforated open end of the bi-lumen tip 120 remains outside the body cavity 170. [0026] The body cavity 170 suitable for practicing the suction-irrigation method or system of the present disclosure includes, and is not limited to, peritoneal cavity, chest cavity, abdomina l cavity, thorax cavity, ventricle, joint, or an open wound site after surgery such as chest surgery, urologica l surgery, lung surgery or open heart surgery.
[0027] An enla rged view of the suction-irrigation tip assembly 110 is depicted in FIG. 2A, an exploded view of the suction-irrigation tip assembly 110 is depicted in FIG 2B, and a sectional view of the suction-irrigation tip assembly 110 is illustrated in FIG 2C.
[0028] FIG. 2A illustrates a bi-lumen tip 120 and a n adapter 130 connected thereto. I n this depicted example, the bi-lumen tip 120 is tapered toward one end with a plurality of perforations on its surface, whereas the other end remains perforation free and has two separate openings. The bi-lumen tip 120 includes a drainage lumen 121 and a fluid delivery lumen 122 arranged to be adjacent to each other a nd share a common lumen wall within the tip, and the fluid delivery lumen 122 and the drainage lumen 121 are different in length. The fluid delivery lumen 122 is preferably shorter in length compared with that of the d rainage lumen 121. Further, the dra inage lumen 121 is open at both ends (125, 127), a nd have a plurality of perforations 123 on its surface for the removal of unwanted materia ls from the body cavity 170. I n contrast, the fluid delivery lumen 122 has only one open end 126 and a plura lity of perforations 124 on its surface for the delivery of fluids to the body cavity 170. I n this example, during suction-irrigation process, one end of the adapter 130 is inserted into the opening 126 of the fluid delivery lumen 122, whereas the other end of the adapter 130 may be fitted into the catheter 140b and thereby coupling the fluid delivery lumen 122 to the fluid delivery unit (not shown). Similarly, the opening 125 of the drainage lumen may be fitted into the catheter 140a and thereby coupling the drainage lumen 121 to the suction unit (not shown). Alternatively, the fluid delivery lumen 122 may be coupled to the fluid delivery unit by a connecting catheter without the aid of an adaptor.
[0029] During the suction-irrigation process, the two lumens of the bi-lumen tip 120 are respectively coupled to the suction unit 150 and the fluid delivery unit 160. According to one embodiment of the present disclosure, the drainage lumen 121 of the bi-lumen tip 120 is coupled to the suction unit 150 through catheter 140a, so as to form a suction route for continuously withdrawing unwanted materials such as fluids, cell or tissue debris, blood or blood clots out of the body cavity 170. The suction unit 150 is a negative pressure system and is comprised of a fluid reservoir 151 and a suction pump 152. Upon activating the suction pump 152, unwanted materials within the body cavity 170 are pulled through the plurality of perforations 123 located on the outer surface of lumen 121 due to the negative pressure generated by the suction pump 152, these unwanted materials then traveled through catheter 140a and are collected in a fluid reservoir 151. The arrow illustrated in the suction unit 150 indicates the suction direction generated by the suction pump 152, such that materials from the body cavity are drawn continuously and trapped in the fluid reservoir 151. Similarly, the fluid delivery lumen 122 of the bi-lumen tip 120 may be coupled to the fluid delivery unit 160 through catheter 140b via connecting through the catheter adapter 130, so as to form a fluid delivery route for delivering a fluid such as a saline or a medical fluid to the body cavity 170. The fluid delivery unit 160 is a positive pressure system. In one example, the fluid delivery unit 160 is a fluid bag 161 hanged on a drip stand such that the fluid is delivered to the body cavity 170 by gravity. Optionally, the fluid delivery unit 160 may further comprise a pump for drawing the fluid out of its container and deliver to the body cavity via the connecting catheter. Upon activating fluid delivery unit 160, a fluid within the fluid bag 161 is sent through catheter 140b due to gravity or the positive pressure generated by the optional fluid delivery pump, the fluid eventually exits from the plurality of perforations 124 located on the outer surface of the fluid delivery lumen 122 and into the body cavity 170. The respective pressure generated by the suction unit 150 and the fluid delivery unit 160 may be adjusted so that the unwanted materials and the fluid are respectively transported through the system 100 in the same or different velocity, which may depend on the actual need of the irrigation process. The fluid delivery unit 160 may optionally comprise a valve for adjusting the flow rate of the fluids. Any skilled technician or physician may adjust the respective pressure required for the suction unit 150 and the fluid delivery unit 160 without undue experimentation. Suitable examples for a suction pump or a fluid delivery pump may include, but are not limited to, a vacuum pump and a peristaltic pump. Preferably, a peristaltic pump is employed as the suction pump or the optional fluid delivery pump.
[0030] Suitable fluid in the fluid bag 161 includes, but is not limited to, a saline or a medical fluid which contains therein an effective amount of a therapeutic agent such as an antibiotic, an anti-inflammation agent or an anti-viral agent for sterilizing and preventing the body cavity from infection. At least one fluid may be employed when practicing the method and/or system of the present disclosure. In one example, a saline may be delivered to the body cavity first, followed by a medical fluid, such as a fluid containing antibiotics. In other examples, saline and the medical fluid may be delivered in alternative or in any desirable sequence, and the sequence may be repeated for any desirable times, depends on the therapeutic regime ordered by the attending physician of the patient.
[0031 ] The suction route and the fluid delivery route may be established simultaneously or sequentially. In one example, the suction route and the fluid delivery route are established simultaneously, in which the fluid delivery unit 160 and the suction pump 152 are activated simultaneously such that the body cavity 170 is washed with a saline or a medical fluid through the delivery route while unwanted materials and the spent fluid are withdrawn out of the body cavity and trapped in the fluid reservoir 151. In another example, the suction route is established first so that the body cavity is relatively free of unwanted materials before the fluid delivery route is established and saline and/or medical fluid is delivered there to.
[0032] The bi-lumen tip 120 is preferably made of a polymeric material such as thermal-setting plastics or thermal plastics and the like. The adapter 130 may be made of the same material as that of the bi-lumen tip 120. The perforated end of the bi-lumen tip 120 may be about 0.3 to 2 inches in length, such as about 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9 or 2.0 inches in length. Preferably, the perforated end of the bi-lumen tip 120 may be about 0.5 to 1.8 inches in length; more preferably, about 0.8 to 1.6 inches in length; and most preferably about 1.0 inch in length. As to the length of bi-lumen tip that remains outside the body cavity 170, that is, the non-perforated, non-tapered open end of the bi-lumen tip 120, there is no particular limitation, as long as it does not obstruct the function of the disclosed bi-lumen tip. Further, the fluid delivery lumen and the drainage lumen may be of the same or different length. The bi-lumen tip 120 preferably may have a round cross-section that is about 1/8, 3/16 or 1/4 inch in diameter. Alternatively, the bi-lumen tip 120 may be flattened into an elliptical or oval shape, provided that fluid communication is maintained between the bi-lumen tip and the body cavity. The two lumens of the bi-lumen tip 120 may have a size that is same or different. In one example, the size of the drainage lumen 121 for withdrawing unwanted materials from the body cavity is larger than that of the fluid delivery lumen 122 for fluid delivery purpose. In another example, the drainage lumen 121 and the fluid delivery lumen 122 are of same size.
[0033] The perforations (123, 124) along the outer surfaces of the respective lumens (121, 122) may be round in shape; or any other suitable shape, as long as it allows fluid communication between the body cavity and the bi-lumen tip 120. The perforations 123 on the outer surface of the drainage lumen 121 may be of the same size with those on the outer surface of the fluid delivery lumen 122. Preferably, the perforations 123 on the outer surface of the drainage lumen 121 are larger in size than those on the outer surface of the fluid delivery lumen 122. In the case when the perforations are round, the round perforations 123 on the outer surface of the drainage lumen 121 may be about 1 to 5 mm in diameter, such as 1, 2, 3, 4 or 5 mm in diameter; whereas the round perforations 124 on the outer surface of the fluid delivery lumen 122 may be about 1 to 3 mm in diameter, such as 1, 2 or 3 mm in diameter.
[0034] The bi-lumen tip of the present disclosure provides a unique and useful product for use with conventional irrigation system and/or method for conditions where drainage of unwanted materials and delivery of medical fluids are required with a minimum of complications.
[0035] It will be understood that the above description of embodiments is given by way of example only and that various modifications may be made by those with ordinary skill in the art. For example, the bi-lumen tip having first and second lumens may be tapered toward one end and is bifurcated at the other end, such that the two lumens of the bi-lumen tip share a common lumen wall at the perforated end and remain separated at the bifurcated end. During the suction-irrigation process, the perforated end of the bi-lumen tip is inserted into a body cavity of a patient, whereas the bifurcated end, in which the two lumens remain separated, is coupled to the suction unit and the fluid delivery unit respectively through suitable catheters, and thereby forming an irrigation system for removing unwanted materials from the body cavity and delivering fluids thereto. The above specification, examples and data provide a complete description of the structure and use of exemplary embodiments of the invention. Although various embodiments of the invention have been described above with a certain degree of particularity, or with reference to one or more individual embodiments, those with ordinary skill in the art could make numerous alterations to the disclosed embodiments without departing from the spirit or scope of this invention.

Claims

WHAT IS CLAIMED IS:
1. A bi-lumen tip for coupling to a suction unit and a fluid delivery unit for the removal of unwanted materials from a body cavity and the delivery of at least one fluid to the body cavity, the bi-lumen tip is characterized in having a perforated end for inserting into the body cavity and a non-perforated end that remains outside the body cavity, the bi-lumen tip comprises,
a drainage lumen coupled to the suction unit, and has a first plurality of perforations on its surface for the removal of unwanted materials from the body cavity; and
a fluid delivery lumen coupled to the fluid delivery unit, and has a second plurality of perforations on its surface for delivering the at least one fluid to the body cavity;
wherein the drainage lumen and the fluid delivery lumen are arranged in parallel and share a common lumen wall within the bi-lumen tip, and the respective first and second plurality of perforations of the drainage lumen and the fluid delivery lumen are disposed on part of the surface of the perforated end of the bi-lumen tip.
2. The bi-lumen tip of claim 1, wherein
the drainage lumen has a cross-section that is larger than that of the fluid delivery lumen;
each of the first plurality of perforations respectively has a cross-section that is larger than that of each of the second plurality of perforations; and
the fluid delivery lumen and the drainage lumen is same or different in length.
3. The bi-lumen tip of claim 1, wherein the perforated end of the bi-lumen tip having the first and second perforations disposed thereon is about 0.3 to 2 inches in length.
4. The bi-lumen tip of claim 1, wherein the fluid delivery lumen further comprises an opening towards the perforated end of the bi-lumen tip for receiving an adapter, so as to couple the fluid delivery lumen to the fluid delivery unit
5. A suction-irrigation process for removing unwanted materials from a body cavity and delivering at least one fluid thereto comprising,
constructing a drainage route by inserting the perforated end of the bi-lumen tip of claim 1 into the body cavity and coupling the drainage lumen to the suction unit; constructing a fluid delivery route by connecting the fluid delivery lumen of the bi-lumen tip of claim 1 to the fluid delivery unit;
draining the body cavity by withdrawing the unwanted materials from the first plurality of perforations of the drainage lumen of the bi-lumen tip of claim 1 via the constructed drainage rout; and
irrigating the body cavity by delivering the at least one fluid through the second plurality of perforations of the fluid delivery lumen of the bi-lumen tip of claim 1 via the constructed fluid delivery route.
6. The suction-irrigation process of claim 5, wherein the draining step and the irrigating step are performed alternatively or simultaneously.
7. The suction-irrigation process of claim 5, wherein
the drainage lumen has a cross-section that is larger than that of the fluid delivery lumen;
each of the first plurality of perforations respectively has a cross-section that is larger than that of each of the second plurality of perforations; and
the fluid delivery lumen and the drainage lumen is same or different in length.
8. In a suction-irrigation system having a suction unit for draining unwanted materials from a body cavity; and a fluid delivery unit for delivering at least one fluid to the body cavity, wherein the improvement of the suction-irrigation system comprises a bi-lumen tip having a perforated end for inserting into the body cavity and a non-perforated end that remains outside the body cavity, and the bi-lumen tip comprises,
a drainage lumen coupled to the suction unit, and has a first plurality of perforations on its surface for the removal of unwanted materials from the body cavity; and
a fluid delivery lumen coupled to the fluid delivery unit, and has a second plurality of perforations on its surface for delivering the at least one fluid to the body cavity;
wherein the drainage lumen and the fluid delivery lumen are arranged in parallel and share a common lumen wall within the bi-lumen tip, and the respective first and second plurality of perforations of the drainage lumen and the fluid delivery lumen are disposed on a part of the surface of the perforated end of the bi-lumen tip.
9. The improvement of the suction-irrigation system of claim 8, wherein the drainage lumen has a cross-section that is larger than that of the fluid delivery lumen;
each of the first plurality of perforations respectively has a cross-section that is larger than that of each of the second plurality of perforations; and
the fluid delivery lumen and the drainage lumen is same or different in length.
10. The improvement of the suction-irrigation system of claim 8, wherein the fluid delivery lumen further comprises an opening towards the perforated end of the bi-lumen tip for receiving an adapter, so as to couple the fluid delivery lumen to the fluid delivery unit.
11. The improvement of the suction-irrigation system of claim 8, wherein the perforated end of the bi-lumen tip having the first and second perforations disposed thereon is about 0.3 to 2 inches in length.
PCT/CN2011/073966 2011-05-12 2011-05-12 Bi-lumen tip and uses thereof WO2012151751A1 (en)

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