 Surgical drainage tube system |
| It is therefore an object of the present invention to provide an improved wound drainage system ... |
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| Method for introducing cardioplegia solution into the coronary sinus |
| In its broader aspects, the invention comprises a catheter for supplying liquid to the coronary ... |
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| Catheter system for the isolation of a segment of blood vessel |
| In accordance with one aspect of the present invention, a catheter for isolating a segment of a ... |
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| Device for treating tissues with an electromagnetic field |
| What is claimed is: 1. A method for normalising biological functions of living tissues by action of ... |
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| Flexible microscope slide |
| It is an object of the present invention to provide a microscope slide adapted for supravital ... |
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| Endoscopic instrument for forming an artificial valve |
| The first object of the present invention is to provide the apparatus and method for forming a ... |
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| Intracardiac blood pump |
| What is claimed is: 1. An intracardiac blood pump, comprising: a pump section having a distal end ... |
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| Transobturator surgical articles and methods |
| The invention overcomes the deficiencies of the prior art and provides for a surgical apparatus and ... |
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| Inflatable isolation bag |
| OF THE PREFERRED EMBODIMENTS One aspect of the invention relates to collapsible structures which ... |
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| Surgical retrieval assembly and associated method |
| As illustrated in FIG. 1A, a snare cauterization instrument assembly comprises a hand held control ... |
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High pressure perfusion device
| Details |
Inventors: Spears, J. Richard; Levin, Philip S.; Zalesky, Paul J.;
Assignee: Therox, Inc. (Costa Mesa, CA); Wayne State University (Detroit, MI)
Primary Examiner: Coggins; Wynn Wood
Assistant Examiner: Gring; N. Kent
Attorney, Agent or Firm: Pennie & Edmonds LLP
The present invention includes a guidewire device capable of delivering perfusion fluids to a vascular site while at the same time exhibiting handling characteristics associated with existing non-perfusion guidewires. Preferred embodiments include a perfusion guidewire which closely matches the dimensions and physical characteristics of standard guidewires. Preferred embodiments also permit high pressure perfusion of supersaturated solutions, and include a liquid flow path which will not promote bubble generation or growth, or destabilize a supersaturated solution. |
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DETAILED DESCRIPTION The structure and function of the preferred embodiments can best be understood by reference to the drawings.
The reader will note that the same reference numerals appear in multiple figures.
Where this is the case, the numerals refer to the same or corresponding structure in those figures.
The present invention includes several embodiments of a perfusion guidewire.
As will be made clear below, the major differences between the various embodiments are in the transitional region and distal segments.
Persons of ordinary skill in the art will understand that the alternative regions or segments may be used together in combinations other than described in detail below, based on the teachings contained herein.
Transluminal Fluid Delivery System FIG.
1 shows a transluminal fluid delivery system 100 according to a preferred embodiment of the invention.
Fluid delivery system 100 includes a high pressure source 102, such as a pump or reservoir, a connector 70, a tube 104 connecting an output of high pressure source 102 to an input of connector 70, and a perfusion guidewire 108.
As will be discussed further below, each embodiment of perfusion guidewire 108 includes a handle or proximal segment 10, a transitional region 20, and a distal segment 40.
Proximal Segment or Handle Referring now to FIG.
2, a handle or proximal segment 10 of perfusion guidewire 108 is shown.
Proximal segment 10 includes a thin-walled tube 12 which defines a lumen.
Tube 12 is made of bio-compatible material, has the appropriate dimensions, and the appropriate burst strength, flexibility, torque transfer, and kink resistance characteristics for use as perfusion guidewire as described herein.
Tube 12 is preferably coated over most of its length with a low friction, thin film bio-compatible coating 13, such as PTFE.
Tube 12 also has an opening 16 for connection to a source of high pressure, oxygen supersaturated liquid.
In one embodiment, tube 12 of proximal segment 10 is preferably a 304 stainless steel tube having a 0
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Heart Surgery 
