Vascular access methods and devices
First Claim
Patent Images
1. A method of distinguishing between positioning of a probe in a vein or an artery of a patient, comprising:
- providing a device comprising a housing having a proximal housing portion and a distal housing portion, the distal housing portion coupled to the probe, the device further comprising,a pressure sensing system at least partially carried by the housing and comprising a processing unit coupled with a pressure sensor so as to receive a signal from the pressure sensor and determine from the signal a pressure value of an environment about a distal portion of the probe, andan output unit carried by the housing intermediate the proximal housing portion and the distal housing portion, the output unit comprising a visual display, the output unit coupled to the pressure sensing system so as to receive a pressure value signal and output on the visual display a reporting signal indicating the determined pressure value and/or positioning of the distal portion of the probe in the vein or the artery of the patient;
advancing the device distally such that the distal portion of the probe advances through tissue of the patient and into the vein of the patient;
detecting a change in pressure about the distal portion of the probe during advancing so as to indicate positioning of the distal portion of the probe;
distinguishing between positioning of the distal portion in the vein of the patient in response to the reporting signal on the visual display;
introducing a guidewire through the housing proximally to distally generally align with the probe into the vein following distinguishing of probe positioning, wherein the guidewire extends out a distal end of the probe; and
drawing blood toward a syringe coupled to the proximal housing portion of the housing for blood visualization.
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Abstract
Methods and devices for detecting positioning of a probe in a tissue of a patient. A method can include providing a detection device; advancing a device coupled probe through the tissue of the patient and toward the patient'"'"'s target tissue; detecting a change in pressure about the distal portion of the coupled probe during advancing, where the detected pressure change indicates probe positioning in a vein or artery of the patient; outputting the detected pressure change or indication of probe positioning to a visual display.
73 Citations
22 Claims
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1. A method of distinguishing between positioning of a probe in a vein or an artery of a patient, comprising:
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providing a device comprising a housing having a proximal housing portion and a distal housing portion, the distal housing portion coupled to the probe, the device further comprising, a pressure sensing system at least partially carried by the housing and comprising a processing unit coupled with a pressure sensor so as to receive a signal from the pressure sensor and determine from the signal a pressure value of an environment about a distal portion of the probe, and an output unit carried by the housing intermediate the proximal housing portion and the distal housing portion, the output unit comprising a visual display, the output unit coupled to the pressure sensing system so as to receive a pressure value signal and output on the visual display a reporting signal indicating the determined pressure value and/or positioning of the distal portion of the probe in the vein or the artery of the patient; advancing the device distally such that the distal portion of the probe advances through tissue of the patient and into the vein of the patient; detecting a change in pressure about the distal portion of the probe during advancing so as to indicate positioning of the distal portion of the probe; distinguishing between positioning of the distal portion in the vein of the patient in response to the reporting signal on the visual display; introducing a guidewire through the housing proximally to distally generally align with the probe into the vein following distinguishing of probe positioning, wherein the guidewire extends out a distal end of the probe; and drawing blood toward a syringe coupled to the proximal housing portion of the housing for blood visualization. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A device for distinguishing between positioning of a probe in a vein or an artery of a patient, the device comprising:
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a housing having a proximal portion and a distal portion, the distal portion having a first port that is detachably couplable to the probe, the proximal portion of the housing comprising a second port that is detachably couplable to a syringe, and the first port fluidly coupled to the second port about a channel, wherein the channel is at least partially translucent exteriorly to the device so as to allow visualization of fluid within the channel; a pressure sensing system at least partially carried by the housing and comprising a processing unit coupled with a pressure sensor so as to receive a signal from the pressure sensor and determine from the signal a pressure value of an environment about a distal portion of the probe; an output unit carried by the housing intermediate the proximal portion and the distal portion, the output unit comprising a visual display, the output unit coupled to the pressure sensing system so as to receive pressure value signal and provide an output on the visual display comprising a reporting signal indicating at least one of the determined pressure value, a position of the probe in a vein or artery of the patient, or both, wherein the output on the display distinguishes between placement of the distal portion in the artery or the vein; and a guidewire port carried by the housing and fluidly coupled to the first port wherein the syringe is coupled to the second port such that the probe, device, and syringe are arranged axially and in sequence from the distal portion to the proximal portion. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. An assembly for distinguishing between positioning of a probe in a vein or an artery of a patient, the assembly comprising:
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a device comprising a housing having a distal portion with a first port that is detachably coupled to the probe and a proximal portion with a second port detachably coupled to a syringe, and a third port to receive a guidewire and connected to the first port to form a path for extending the guidewire through the housing and the probe into a vein; a pressure sensing system carried by the housing and comprising a processing unit coupled with a pressure sensor so as to receive signal from the pressure sensor and determine from the received signal a pressure value of an environment about a distal portion of the probe; and an output unit carried by the housing, the output unit comprising a visual display, the output unit coupled to the pressure sensing system so as to receive a pressure value signal and provide an output on the visual display comprising a reporting signal indicating the positioning of the probe in a vein or artery of the patient, wherein the output on the display distinguishes between placement of the distal portion in the artery or the vein, the reporting signal output via the display comprising at least two different readings indicative of average pressures each measured over a time period having different length of time, frequency of pressure reading, or both; wherein the pressure sensing system and the output unit are disposed substantially between the distal and proximal portions of the housing. - View Dependent Claims (19, 20, 21, 22)
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Specification