A coronary artery load detection method includes: (S1) obtaining the cross-sectional area of a reference cavity, and separately obtaining voltage values of a primary device at a location corresponding to the cross-sectional area of the reference cavity in a low frequency state and a high frequency state; (S2) separately obtaining voltage values of the primary device at the location of a bottom end or a top end of a to-be-detected object in the low frequency state and the high frequency state under the same current; (S3) driving the primary device to move at a constant speed, and obtaining a voltage value of the primary device during the movement in the low frequency state under the same current; and (S4) obtaining the cross-sectional area of each location of the to-be-detected object according to a preset fixed current value, the cross-sectional area of the cavity, and the obtained voltage values.

A medical sensing system (100) includes an elongate interventional device (101) and an adjustable capacitance circuit (102). The elongate interventional device (101) includes a sensor (103) having a capacitance (C.sub.ss). The elongate interventional device (101) also includes a first electrical conductor (104) and a second electrical conductor (105). The first electrical conductor (104) and the second electrical conductor (105) are in electrical contact with the sensor (103) and extend along the elongate interventional device (101). The elongate interventional device (101) also includes i) an electrically conductive shield (106) that overlaps the electrical conductors (104, 105) and/or ii) an electrically conductive shaft (107). The adjustable capacitance circuit (102) provides an adjustable capacitance (C.sub.Adj1, C.sub.Adj2) between at least one of the electrical conductors (104, 105) and i) the electrically conductive shield (106) that overlaps the electrical conductors (104, 105) and/or ii) the electrically conductive shaft (107).

This document describes devices, systems, and methods for automatically deploying intravascular devices. For example, this document describes devices, systems, and methods for automatically deploying and controlling intravascular catheter-based devices for treating catastrophic bleeding from large and medium size vessels such as, but not limited to, the aorta or iliac arteries. In some embodiments, an operator/care giver will simply press the system against the patients body proximate to a desired site of insertion, or will attach the system to the patient proximate to the desired site of insertion. The operator will then activate the system. Thereafter, the system will use built in imaging (e.g., ultrasound) to locate a proper insertion point and then deploy an access needle to attain vascular access. With that, the system will then automatically insert the intravascular device into the patient.

A system may include an expandable member, and a plurality of sensors disposed on an outer surface of the expandable member and circumferentially spaced apart from one another, wherein each of the plurality of sensors includes a first emitter configured to emit light of a first wavelength, and a detector configured to detect light, and a controller coupled to the plurality of sensors.

Systems, devices, and methods for organ Retroperfusion along with regional mild hypothermia. One such system includes a hypothermia system including a hypothermia system outlet and a hypothermia system inlet; and a connector comprising a coolant inlet, a coolant outlet, a coolant reservoir, and a blood lumen, whereby the coolant inlet is configured to couple to the hypothermia system outlet and whereby the coolant outlet is configured to couple to the hypothermia system inlet; whereby a cooling product, when the hypothermia system is connected to the connector, can flow from the hypothermia system, through the hypothermia system outlet, into the coolant inlet, through the coolant reservoir, into the coolant outlet, and into the hypothermia system inlet, so that the cooling product can cool blood flowing through the blood lumen.

Systems, devices, and methods for organ Retroperfusion along with regional mild hypothermia. One such system includes a hypothermia system including a hypothermia system outlet and a hypothermia system inlet; and a connector comprising a coolant inlet, a coolant outlet, a coolant reservoir, and a blood lumen, whereby the coolant inlet is configured to couple to the hypothermia system outlet and whereby the coolant outlet is configured to couple to the hypothermia system inlet; whereby a cooling product, when the hypothermia system is connected to the connector, can flow from the hypothermia system, through the hypothermia system outlet, into the coolant inlet, through the coolant reservoir, into the coolant outlet, and into the hypothermia system inlet, so that the cooling product can cool blood flowing through the blood lumen.

Systems, methods, and devices for hyperspectral imaging in a light deficient environment are disclosed. A system includes an emitter for emitting pulses of electromagnetic radiation and an image sensor comprising a pixel array for sensing reflected electromagnetic radiation. The system includes a controller comprising a processor in electrical communication with the image sensor and the emitter, wherein the controller synchronizes timing of the pulses of electromagnetic radiation during a blanking period of the image sensor. The system is such that at least a portion of the pulses of electromagnetic radiation emitted by the emitter comprises one or more of electromagnetic radiation having a wavelength from about 513 nm to about 545 nm, electromagnetic radiation having a wavelength from about 565 nm to about 585 nm, or electromagnetic radiation having a wavelength from about 900 nm to about 1000 nm.

Systems, methods, and devices for hyperspectral imaging in a light deficient environment are disclosed. A system includes an emitter for emitting pulses of electromagnetic radiation and an image sensor comprising a pixel array for sensing reflected electromagnetic radiation. The system includes a controller comprising a processor in electrical communication with the image sensor and the emitter, wherein the controller synchronizes timing of the pulses of electromagnetic radiation during a blanking period of the image sensor. The system is such that at least a portion of the pulses of electromagnetic radiation emitted by the emitter comprises one or more of electromagnetic radiation having a wavelength from about 513 nm to about 545 nm, electromagnetic radiation having a wavelength from about 565 nm to about 585 nm, or electromagnetic radiation having a wavelength from about 900 nm to about 1000 nm.

Systems, methods, and devices allow percutaneous mapping, orientation and/or ablation in bodily cavities or lumens. Such may include a structure that is percutaneously positionable in a cavity, such as an intra-cardiac cavity of a heart. Transducers carried by the structure are responsive to blood flow. For example, the transducers may sense temperature, temperature being related to convective cooling caused by blood flow. A controller discerns positional information or location, based on signals from the transducers. For example, blood flow may be greater and/or faster proximate a port in cardiac tissue than proximate tissue spaced from the port. Position information may allow precise ablation of selected tissue, for example tissue surround a port in the intra-cardiac cavity.

Systems, methods, and devices allow percutaneous mapping, orientation and/or ablation in bodily cavities or lumens. Such may include a structure that is percutaneously positionable in a cavity, such as an intra-cardiac cavity of a heart. Transducers carried by the structure are responsive to blood flow. For example, the transducers may sense temperature, temperature being related to convective cooling caused by blood flow. A controller discerns positional information or location, based on signals from the transducers. For example, blood flow may be greater and/or faster proximate a port in cardiac tissue than proximate tissue spaced from the port. Position information may allow precise ablation of selected tissue, for example tissue surround a port in the intra-cardiac cavity.