Source: https://patents.google.com/patent/US9486608B2/en
Timestamp: 2019-06-16 03:47:35
Document Index: 501202279

Matched Legal Cases: ['Application No. 61', 'Application No. 61', 'Application No. 2', 'Application No. 2', 'Application No. 2013101738390', 'Application No. 2011', 'Application No. 10', 'Application No. 201310173839', 'Application No. 201310173839']

US9486608B2 - Detachable tip microcatheter - Google Patents
US9486608B2
US9486608B2 US13/859,321 US201313859321A US9486608B2 US 9486608 B2 US9486608 B2 US 9486608B2 US 201313859321 A US201313859321 A US 201313859321A US 9486608 B2 US9486608 B2 US 9486608B2
US13/859,321
US20140135737A1 (en
2008-08-19 Priority to US9018508P priority Critical
2009-08-19 Priority to US12/543,857 priority patent/US9468739B2/en
2013-04-09 Application filed by Covidien LP filed Critical Covidien LP
2013-04-09 Priority to US13/859,321 priority patent/US9486608B2/en
2014-05-15 Publication of US20140135737A1 publication Critical patent/US20140135737A1/en
2016-11-08 Publication of US9486608B2 publication Critical patent/US9486608B2/en
This application is a continuation of U.S. application Ser. No. 12/543,857, filed Aug. 19, 2009 which claims priority to and the benefit of U.S. Provisional Patent Application No. 61/090,185, filed Aug. 19, 2008, and U.S. Provisional Patent Application No. 61/090,188, filed Aug. 19, 2008, the entire contents of each of which are incorporated herein by reference.
FIG. 7C illustrates another alternative embodiment of a sleeve 126″. The sleeve 126″ can be similar to the sleeves 126′ and 126″ described above, except that the sleeve 126″ can comprise two discrete components 128 a and 128 h. The components 128 a and 128 b can be mirror images of one another, and can be attached (e.g. adhered together or held together) to form the sleeve 126″. As with the sleeve 126′, the sleeve 126″ can include separation elements 127 which can be used to separate the distal end 134 and proximal end 136 of the tubular body 116 and tip body 130.
Example 4 Use of Detachable Tip Containing Imaging Agents
1. A microcatheter for delivering embolic agent to a vascular site within a patient, the microcatheter comprising:
an elongate flexible tubular body having a proximal end and a distal end and defining at least one tubular body lumen; and
a tip body having a proximal end and a distal end and defining a tip body lumen; and
a sleeve covering a distal portion of the tubular body and a proximal portion of the tip body such that the distal end of the tubular body is proximal to the proximal end of the tip body,
wherein the sleeve is frictionally engaged with both the tip body and the tubular body, and
wherein the tip body is supported on the tubular body by the sleeve such that the tip body lumen is in fluid communication with the at least one tubular body lumen, the tip body being detachable from the tubular body by application of a retraction force to the elongate flexible tubular body in a direction away from the tip body.
2. The microcatheter of claim 1, further comprising a first marker disposed on the distal end of the tubular body under the sleeve for indicating a position of the tip body prior to detachment of the tip body.
3. The micro catheter of claim 2, wherein the first marker is a radiopaque marker band on an outer surface of the tubular body.
4. The microcatheter of claim 3, further comprising a second marker disposed on the tubular body for indicating a position of the tip body after detachment of the tip body.
5. The microcatheter of claim 1, wherein the tip body comprises a plurality of holes on a side wall of the tip body for delivering the embolic agent to the vascular site.
6. The microcatheter of claim 1, wherein the sleeve is a thermoplastic selected from the group consisting of thermoplastic polyolefin elastomer (TPE); acrylic; celluloid; cellulose acetate; ethylene-vinyl acetate (EVA); ethylene vinyl alcohol (EVAL); fluoroplastics (PTFE, FEP, PFA, CTFE, ECTFE, ETFE); ionomers; acrylic/PVC alloy; liquid crystal polymer (LCP); polyacetal (POM or Acetal); polyacrylonitrile (PAN or acrylonitrile); polyamide (PA or Nylon); polyarylethkerketone (PAEK or Ketone); polybutadien (PBD); polybutylene (PB); polycaprolactone (PCL); polychlorotrifluoroethylene (PCTFE); polyhydroxyalkanoates (PHAs); polyketone (PK); polyester; low density polyethylene (LDPE); linear low density polyethylene (LLDPE); polyethylene (PE); polyetherimide (PEI); polyethersulfone (PES); polysulfone; polyethylenechlorinates (PEC); polylactic acid (PLA); polymethylpentent (PMP); polyphenylene oxide (PPO); polyphenylene sulfide (PPS); polyphthalamide (PPA); polypropylene (PP); polystyrene (PS); polyvinyl chloride (PVC); polyvinylidene chloride (PVDC); and combinations thereof.
7. The microcatheter of claim 6, wherein the thermoplastic is a polyolefin.
8. The microcatheter of claim 7, wherein the polyolefin is polyethylene or polyolefin elastomer or combinations thereof.
9. The microcatheter of claim 1, wherein the retraction force is between approximately 10 to 160 gram-force.
10. The microcatheter of claim 9, wherein the microcatheter has a static burst strength of between about 150 and 400 psi, and the retraction force is between about 25 and 40 gram-force.
11. The microcatheter of claim 9, wherein the retraction force is approximately 20 gram-force to approximately 40 gram-force.
12. The microcatheter of claim 9, wherein the retraction force is approximately 30 gram-force to approximately 50 gram-force.
13. The microcatheter of claim 1, wherein the tip body is biodegradeable.
14. The microcatheter of claim 1, wherein an amount the sleeve overlaps with the tubular body is greater than an amount the sleeve overlaps with the tip body.
15. The microcatheter of claim 1, wherein the retraction force is applied along a longitudinal axis of the microcatheter.
16. The microcatheter of claim 1, wherein the sleeve comprises a heat shrinkable material.
17. A microcatheter for delivering embolic agent to a vascular site within a patient, the microcatheter comprising:
an elongate flexible tubular body having a proximal end and a distal end and defining at least one tubular body lumen;
wherein the sleeve is frictionally engaged with both the tip body and the tubular body, wherein the sleeve forms a tighter frictional engagement with the tubular body than with the tip body, and
18. A microcatheter for delivering embolic agent to a vascular site within a patient, the microcatheter comprising:
wherein the sleeve is frictionally engaged with both the tip body and the tubular body, and wherein the tip body is supported on the tubular body by the sleeve such that the tip body lumen is in fluid communication with the at least one tubular body lumen, the tip body being detachable from the tubular body by application of a retraction force to the elongate flexible tubular body in a direction away from the tip body,
wherein the sleeve comprises an internal separation element configured to separate the distal end of the tubular body and the proximal end of the tip body when the sleeve is frictionally engaged with the tubular body and the tip body.
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US12/543,857 US9468739B2 (en) 2008-08-19 2009-08-19 Detachable tip microcatheter
US13/859,321 US9486608B2 (en) 2008-08-19 2013-04-09 Detachable tip microcatheter
US15/278,062 US20170079664A1 (en) 2008-08-19 2016-09-28 Detachable tip microcatheter
US12/543,857 Continuation US9468739B2 (en) 2008-08-19 2009-08-19 Detachable tip microcatheter
US15/278,062 Continuation US20170079664A1 (en) 2008-08-19 2016-09-28 Detachable tip microcatheter
US20140135737A1 US20140135737A1 (en) 2014-05-15
US9486608B2 true US9486608B2 (en) 2016-11-08
US12/543,857 Active 2033-04-06 US9468739B2 (en) 2008-08-19 2009-08-19 Detachable tip microcatheter
US13/859,321 Active 2030-03-02 US9486608B2 (en) 2008-08-19 2013-04-09 Detachable tip microcatheter
US15/278,062 Pending US20170079664A1 (en) 2008-08-19 2016-09-28 Detachable tip microcatheter
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