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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | US-0953072 (1972-09-29) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 297 인용 특허 : 0 |
A method and apparatus for determining accurately, both during and after insertion, the full length position of catheters (including implanted ports (64)), tubes (30) and placement guidewires (22) within biological tissue is disclosed including a transmitter/detector unit (2) having an alternating c
A method and apparatus for determining accurately, both during and after insertion, the full length position of catheters (including implanted ports (64)), tubes (30) and placement guidewires (22) within biological tissue is disclosed including a transmitter/detector unit (2) having an alternating current (AC) radio-frequency (RF) transmitter with antenna (14), and a radio signal transmitter in the form of a continuous or segmented fine wire receiving antenna (28, 32, 74) situated along the full length of the catheter, guidewire, and implanted port assemblies (22, 30, 64). The guidewire apparatus also includes a tip antenna. These antennae are connected by a removable clip (18) to a wide-band RF detector circuit, situated within the transmitter/detector unit (2). The RF transmitter/detector circuit provides a voltage output that is a direct function of the relative spatial proximity of the transmitting antenna. This proximity is displayed visually to the operator using a sequential linear LED array (8) whose sensitivity is controlled by a gain control knob (10). An audible tone is also produced by a miniature speaker (12), and whose tone frequency is varied as a direct function of the transmitter proximity. Also shown is a method and apparatus for locating the full length position of implanted port (64) mounted catheters (72), and a method and apparatus for simultaneous infusion into an implanted port assembly 64 and detecting the full length position of the port mounted catheter (72).
A system for assisting in the placement and location of previously inserted catheters, tubes or placement guidewires inside biological tissue, wherein each of said catheters, tubes or placement guidewires have a proximate end and a distal end and a predefined first length therebetween, said system b
A system for assisting in the placement and location of previously inserted catheters, tubes or placement guidewires inside biological tissue, wherein each of said catheters, tubes or placement guidewires have a proximate end and a distal end and a predefined first length therebetween, said system being able to determine a location of said catheters, tubes or placement guidewires inside biological tissue in close proximity thereto at any point anywhere along the first length thereof, said system comprising in combination: at least one of a catheter, tube or placement guidewire each being formed of a flexible solid material of a measurable thickness along the predefined first length thereof having; a first antenna being a flexible dipole having a proximate and a distal end defining a selected second length therebetween contained individually within said flexible solid material of each of said at least one of a catheter, tube or placement guidewire with the proximate ends of said flexible solid material and said first antenna in alignment, with said first antenna extending along at least a portion of the length of each of said at least one catheter, tube or placement guidewire to receive or transmit an RF signal along the selected second length of the flexible dipole; and a first connector mounted on said proximate end of each of said at least one of a catheter, tube or placement guidewire and connected to said proximate end of said first antenna with the distal end of said first antenna being otherwise free of connection; and a detector/transmitter including: a second antenna to receive or transmit an RF signal between itself and said first antenna external to said biological tissue in which each of said at least one of a catheter, tube or placement guidewire is located; an RF transmitter to generate an RF signal; a first conductor connected to apply said RF signal from said RF transmitter to one of said first and second antennas; a detector to determine the strength of said RF signal being coupled electro-magnetically between said first and second antennas as said second antenna of said transmitter/detector is brought into proximity of said first antenna within each of said at least one of a catheter, tube or placement guidewire in place within said biological tissue; a signaling device coupled to said detector to provide an indication to the user of a strength of said RF signal coupled between said first and second antennas; and a second connector disposed to couple with said first connector to couple said RF signal between said first antenna and said detector/transmitter.
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