Abstract: The present technology is directed to adjustable interatrial shunting systems that selectively control blood flow between the left atrium and the right atrium of a patient. The adjustable interatrial devices include a shunting element having an outer surface configured to engage native tissue and an inner surface defining a lumen that enables blood to flow from the left atrium to the right atrium when the system is deployed across the septal wall. The systems can include an actuation assembly for selectively adjusting a geometry of the lumen and/or a geometry of a lumen orifice to control the flow of blood through the lumen.

Abstract: Systems, devices, and methods involve ablation of tissue to treat rhinitis and/or other nasal conditions. Implementations allow treatment of tissue in the confined space of the nasal cavity. Additionally, implementations allow targeted treatment tissue to be ablated, while protecting other non-treatment tissue from unintentional collateral effects that might be produced by the ablation. According to an example implementation, an approach for treating a nasal condition includes advancing a probe into a nasal cavity, the probe including a shaft and a cryotherapy element coupled to the shaft. The approach also includes cryogenically cooling a target treatment site with the cryotherapy element to treat at least one nasal nerve. Additionally, the approach includes transmitting a focused ultrasound beam to a target heating site to increase a temperature tissue at the target heating site.

Abstract: The present technology is directed to adjustable interatrial shunting systems that selectively control blood flow between the left atrium and the right atrium of a patient. The adjustable interatrial devices include a shunting element having an outer surface configured to engage native tissue and an inner surface defining a lumen that enables blood to flow from the left atrium to the right atrium when the system is deployed across the septal wall. The systems can include an actuation assembly for selectively adjusting a geometry of the lumen and/or a geometry of a lumen orifice to control the flow of blood through the lumen.

Abstract: The present technology generally relates to a sensor assembly for an implantable medical device. In some embodiments, the sensor assembly includes a housing having a cavity, and a measurement component positioned within the cavity. When the medical device is implanted within a patient, the sensor can be configured to measure one or more physiological parameters of the patient. In some embodiments, the sensor assembly further includes a coupling element positioned within the cavity and at least partially covering, contacting, or encapsulating the measurement component. The coupling element can be configured to transmit or convey the one or more physiological parameters to the measurement component, such that the measurement component can measure the one or more physiological parameters without exposure to an environment external to the sensor assembly.

Abstract: The present technology is directed to implantable medical devices, systems, and methods for restricting, closing, or blocking an opening or defect in an anatomical structure. For example, many embodiments of the present technology are directed to implantable closure devices for plugging or sealing an opening in an anatomical structure separating a first body region and the second body region. In many of the embodiments described herein, the implantable closure devices are designed to be “recrossable,” such that a catheter or other percutaneous tool can be passed through the closure device after the device has been implanted.

Abstract: The present technology is directed to adjustable shunting systems having a shunting element, a shape memory actuator, and a lumen extending therethrough for transporting fluid. The shape memory actuator can have a plurality of struts proximate the shunting element and a plurality of projections extending from the plurality of struts. In operation, the shape memory actuator can be used to adjust a geometry of the lumen. In some embodiments, the system is configured such that (a) any strain in the shape memory actuator is concentrated in the struts, and/or (b) the struts experience greater resistive heating than the projections when an electrical current is applied to the actuator.

Abstract: The present technology relates to interatrial shunting systems and methods. In some embodiments, the present technology includes a method for monitoring a shunting element implanted in a patient and having a lumen fluidly coupling cavities of the patient's heart. The method can comprise obtaining first and second radiographic images of at least two radiopaque elements associated with the lumen of the shunting element. A spatial relationship between the radiopaque elements varies according to a size of the lumen. The first radiographic image can be taken from a first viewing angle and the second radiographic image can be taken from a second viewing angle generally orthonormal to the first viewing angle. The method also includes determining the size of the lumen based, at least in part. on locations of the radiopaque elements in the first and second radiographic images.

Abstract: The present technology provides shunting systems that include an anchoring feature, a first canister, a second canister, and a tethering element coupling the first canister to the second canister. The tethering element can (a) orient the first canister and the second canister in a predetermined configuration when the system is deployed from a catheter, and (b) retain the first canister and the second canister in the predetermined configuration following deployment of the system.

Abstract: The present technology is directed to adjustable interatrial shunting systems that selectively control blood flow between the left atrium and the right atrium of a patient. The adjustable interatrial devices include a shunting element having an outer surface configured to engage native tissue and an inner surface defining a lumen that enables blood to flow from the left atrium to the right atrium when the system is deployed across the septal wall. The systems can include an actuation assembly for selectively adjusting a geometry of the lumen and/or a geometry of a lumen orifice to control the flow of blood through the lumen.

Abstract: A system for delivering energy to implanted devices using electromagnetic wireless charging and associated systems and methods are disclosed herein. In some embodiments, the system includes an energy transmission device and an implanted device. The energy transmission device can include multiple transmission coils, while the implanted device can include one or more receiving coils and one or more chargeable energy storage components. The transmission coils on the energy transmission device can each be energized to generate an electromagnetic field. When the implanted device is positioned within range of the energy transmission device, the receiving coils in the implanted device interact with the electromagnetic fields to generate a current. The current is used to charge the energy storage components.

Abstract: The present technology is directed to adjustable shunting systems having a shunting element, a shape memory actuator, and a lumen extending therethrough for transporting fluid. The shape memory actuator can have a plurality of struts proximate the shunting element and a plurality of projections extending from the plurality of struts. In operation, the shape memory actuator can be used to adjust a geometry of the lumen. In some embodiments, the system is configured such that (a) any strain in the shape memory actuator is concentrated in the struts, and/or (b) the struts experience greater resistive heating than the projections when an electrical current is applied to the actuator.

Abstract: The present technology is directed to implantable medical devices including one or more communication elements configured to transmit and/or receive communication signals. The one or more communication elements can be coupled to one or more components of the device. The communication signals can be used to control, transmit, and/or to receive information from one or more of the components. The communication element(s) can additionally be coupled to a power source and used to transfer power to the components, and/or to transfer operational signals from a first component to a second component. The communication element(s) can be configured to perform a first function at a first (e.g., high) frequency or frequency range, and to perform a second function at a second (e.g., low) frequency or frequency range.

Abstract: The present disclosure provides apparatuses and methods for treating conditions such as chronic daily headache, cluster headache, tension headache, migraine, or acute headache of a patient. In example methods, a cryotherapy element is introduced into the nasal cavity or pterygopalatine fossa to cool or cryoablate at least one of a nasal nerve tissue or nasal blood vessel. The cryotherapy element may be introduced into the nasal cavity in a collapsed position, and prior to cooling a target treatment site may be expanded to an expanded configuration.

Abstract: The present technology is generally directed to medical systems having sensors and diaphragms. The sensor device can include a body having a diaphragm. The diaphragm can be formed, for example, by applying a force to the body to create an impression or pattern that corresponds to the diaphragm. The sensor device can be positioned at least partially within a body cavity, and the diaphragm can be configured to flex or bend in response to one or more physiological parameters in the body cavity. In some embodiments, the sensor device can include one or more sensor measurement components configured to measure the one or more physiological parameters based on the flexing or bending of the diaphragm.

Abstract: The present technology includes implantable medical devices having a first disc-shaped anchoring portion and a second disc-shaped anchoring portion connected to the first disc-shaped anchoring portion by an intermediate neck region. The first and second disc-shaped anchoring portions can be formed by one or more filaments woven or formed in a mesh-like pattern. The filaments can be configured such that the first and second disc-shaped anchoring portions have three-dimensional bodies having a partially enclosed cavity or chamber. The device can further include one or more canisters positioned within and retained by the partially enclosed chamber. The canisters can house one or more components of the device, such as an energy storage component, a sensor, or other electronics.

Abstract: The present technology includes systems and methods for invasively adjusting implantable devices for selectively controlling fluid flow between a first body region and a second body region of a patient. For example, in many of the embodiments described herein, a catheter can be used to mechanically and/or electrically engage an implanted medical device. Once the catheter engages the medical device, the catheter can (i) increase a dimension associated with the medical device, such as through mechanical expansion forces, and/or (ii) decrease a dimension associated with the medical device, such as by heating a shape memory component of the medical device above a phase transition temperature.

Abstract: The present technology is generally directed to implantable medical devices and associated methods. For example, a system configured in accordance with embodiments of the present technology can include a body implantable into a patient and configured to undergo a shape change, the body having a conductive path with variable conductivity in portions thereof for selective and/or preferential heating. The body can be coupled with an energy source that can delivery energy to the body and/or conductive path, to promote the shape change in the body.

Abstract: The present disclosure provides apparatuses and methods for treating conditions such as chronic daily headache, cluster headache, tension headache, migraine, or acute headache of a patient. In example methods, a cryotherapy element is introduced into the nasal cavity or pterygopalatine fossa to cool or cryoablate at least one of a nasal nerve tissue or nasal blood vessel. The cryotherapy element may be introduced into the nasal cavity in a collapsed position, and prior to cooling a target treatment site may be expanded to an expanded configuration.

Abstract: The present technology is directed to measuring, estimating, or otherwise determining extravascular lung water (EVLW) in a patient. The systems can include a first device configured to be implanted in the patient and a second device configured to remain external to the patient. The first device can transmit electromagnetic energy, receive electromagnetic energy, or both transmit and receive electromagnetic energy. Likewise, the second device can receive electromagnetic energy, transmit electromagnetic energy, or both receive and transmit electromagnetic energy. In operation, an electromagnetic energy transmission pathway between the first device and the second device can include the patient's lungs. Accordingly, the system can determine EVLW in the patient based at least in part on an attenuation or phase shift of electromagnetic energy transmitted between the first device and the second device along the transmission path.

Abstract: The present technology is generally directed to systems and methods for transporting fluid from a first body region to a second body region, and in particular to shape memory actuators for adjustable shunting systems. The shape memory actuators can have a hysteresis temperature window that surrounds body temperature. For example, the shape memory actuator can be composed at least in part of Nitinol or a Nitinol alloy and have a low-temperature-phase finish-transformation-temperature (e.g., Mf) that is less than body temperature and a high-temperature-phase finish-transformation-temperature (e.g., Af) that is greater than body temperature.