7 results about "Left atrial pressure" patented technology

The present disclosure relates to a device assembly and a method for treating heart failure by normalizing elevated blood pressure in the left atrium of a heart of a mammal. Disclosed herein is a transcatheter interatrial septum excision device assembly configured to create a sized interatrial aperture between the right and left atria of a heart for the relief of elevated left atrial pressure. The device assembly comprises a delivery catheter, a tissue stabilizer attached to a first catheter having a central lumen and a penetrating tip that permits passage of a guidewire, and a cutter attached to a second catheter having a central lumen that permits passage of the first catheter. Alternative configurations comprise a (third) catheter having a central lumen that permits passage of the aforementioned components to and from the right atrium, a tissue retention mechanism and an optional coaxial alignment mechanism.

This document describes systems and methods for cardiac monitoring and treatment using left atrial pressure. In many ways, an implantable pressure sensor in the patient's left atrium records a pressure signal. This left atrial pressure allows the calculation of the atrioventricular ratio (AVR), which is clinically relevant and can be used to guide treatment or as part of an open- or closed-loop automated treatment system.

A method and devices for relieving pressure in the left atrium of a patient's heart is disclosed. The method includes using an ablative catheter in a minimally invasive procedure to prepare an opening from the coronary sinus into a left atrium of the patient's heart. Once the opening is prepared, the opening may be enlarged by a technique such as expanding a balloon within the opening. A stent is then placed within the coronary sinus of the patient, with a transverse portion expanding within the opening, allowing blood to flow from the left atrium to the coronary sinus and then to the right atrium. Pressure within the left atrium is thus relieved.

A left atrium pressure monitoring device based on an acoustic resonant cavity comprises an implant, a receiving probe and a host. The implant comprises a pressure film, a reflection cavity, a modulation structure and a shell, and is implanted into the left atrium through minimally invasive surgery; the pressure film is of a polyimide and silica gel composite structure and is used for sensing pressure and generating deformation; the reflection cavity is of a micro-cavity structure and is coupled with the pressure film; the modulation structure is arranged in the reflection cavity and is used for modulating reflected ultrasonic waves; the receiving probe transmits ultrasonic waves to the implant and receives modulated echoes; and the host processes the echo signal and displays a pressure value. According to the invention, lead-free and passive continuous monitoring is realized, and the device has the advantages of small implantation trauma, high measurement precision and good biocompatibility.

The present disclosure relates to a device assembly and a method for treating heart failure by normalizing elevated blood pressure in the left atrium of a heart of a mammal. Disclosed herein is a RF energy-based transcatheter interatrial septum excision device configured to create a sized interatrial aperture between the right and left atria of a heart for the relief of elevated left atrial pressure. The device assembly comprises a delivery catheter, a tissue stabilizer attached to a tissue stabilizer catheter, a tissue cutter attached to a tissue cutter catheter, a remotely located RF generator connected to an RF cathode and anode of the device assembly.

The invention discloses a left atrium sensing implantation device based on piezoelectric ceramic ultrasonic energy supply and a sensing system. The left atrium sensing implantation device comprises a shell, piezoelectric ceramic, a sensor and a transceiving circuit. The piezoelectric ceramic adopts a partition electrode design, a concentric annular region of the piezoelectric ceramic is used for receiving in-vitro ultrasonic energy and converting the in-vitro ultrasonic energy into electric energy, and a fan-shaped region of the piezoelectric ceramic is used for modulating sensing data in a load keying (LSK) mode and backscattering the sensing data. The sensor is integrated based on a CMOS-MEMS process and synchronously collects pressure and temperature signals in the left atrium. The system further comprises an in-vitro ultrasonic probe and a host, and wireless energy supply, data return and information display are achieved. Complete wireless passive work and minimally invasive implantation of the implantation device are achieved, high-precision and continuous real-time monitoring of pressure and temperature of the left atrium is supported, and the device is suitable for long-term physiological parameter management of heart failure patients.

The utility model relates to a balloon type left atrium piezometric tube, which comprises a piezometric tube main body, the piezometric tube main body is a Y-shaped pipeline mainly formed by a main cavity piezometric tube, an auxiliary cavity balloon tube and an imbedding catheter, and the inner cavity of the main cavity piezometric tube and the inner cavity of the auxiliary cavity balloon tube are not communicated with each other. An eccentric balloon communicated with an inner cavity of the auxiliary cavity balloon tube is arranged at the front end of the auxiliary cavity balloon tube, and a sharp soft head is arranged at the front end of the imbedding catheter. Compared with a traditional left atrium piezometric tube, the balloon type left atrium piezometric tube is easier to operate, not prone to being separated from the left atrium, capable of stably and continuously measuring pressure and capable of being conveniently and rapidly pulled out.