摘要:
A system for simulating a breathing lung is disclosed. The system comprises a lung model contained within an enclosure, wherein a main bronchus of the lung model is open to ambient air. In one embodiment, the system also comprises a vacuum pump connected to the enclosure, a first normally closed 2-way valve connected to the enclosure, a flow controller connected to both the vacuum pump and the enclosure, and a timer connected to the first normally closed 2-way valve. In alternative embodiments, the system comprises a first pump connected to the enclosure and a second pump connected to the enclosure, wherein the first and second pumps work independently of each other, and wherein the first pump is a vacuum pump, and the second pump is either a peristaltic pump or a piston pump.
摘要:
Devices, methods, and systems for treating Type-2 Diabetes and/or obesity by facilitating the delivery of under-digested nutrients within the gastro-intestinal tract without substantial tissue removal are disclosed. In one aspect, the gastro-intestinal tract of a patient is modified by a gastro-intestinal treatment device comprising an elongate element configured to extend within the gastro-intestinal tract, a first attachment element and a second attachment element disposed on the elongate element, wherein the first attachment element and the second attachment element are configured to attach to the gastro-intestinal tract such that a portion of the gastro-intestinal tract is compressed between the first and the second attachment elements. The length of the gastro-intestinal tract modified by the device is effectively shortened, and its surface area is reduced.
摘要:
A method for assessing lung function in a patient is disclosed. The method comprises isolating a lung compartment. Thereafter, in one embodiment, an inhaled gas of known composition is introduced into the lung and compared to the composition of the exhaled gas. Alternatively, accumulated CO2 content is measured within the isolated lung compartment over time, and compared to a baseline CO2 content. Alternatively, a change in pressure of an isolated lung compartment may be monitored. Alternatively, the magnitude of the range of CO2 values in an isolated lung compartment can be compared to a predetermined threshold. Any of the results obtained via these alternative embodiments may be used to determine lung function.
摘要:
A method for determining lung function in a patient is disclosed, in which a multi-lumen catheter with an expandable occluding element at its end is used to isolate a targeted lung compartment, and respiratory characteristics at the targeted lung compartment are measured over multiple respiratory cycles. The relation between various characteristics of the respiratory cycle is used to determine compliance of lung tissue within the targeted lung compartment.
摘要:
A method for determining lung function in a patient is disclosed, in which a multi-lumen catheter with an expandable occluding element at its end is used to isolate a targeted lung compartment, and respiratory characteristics at the targeted lung compartment are measured over multiple respiratory cycles. The relation between various characteristics of the respiratory cycle is used to determine compliance of lung tissue within the targeted lung compartment.
摘要:
A device for safely accessing bone marrow and other tissues is disclosed. Such device comprises a needle assembly, a sensor mechanism, and an actuator configured to engage with the needle assembly via the sensor mechanism to advance a tissue penetrable needle through a first tissue region and into a second tissue region. In one aspect, the first tissue region is a bone cortex and the second tissue region is a bone marrow cavity. The sensor mechanism is configured to disengage the actuator from the needle once the needle has crossed the first tissue region (e.g., bone cortex) into the second tissue region (e.g., bone marrow cavity), thereby preventing the needle from advancing further into the second tissue region. In one aspect, the sensor mechanism is mechanical and comprises a pin assembly comprising a spring-loaded pin that extends through the needle. The pin assembly is configured such that advancement of the distal tip of the spring-loaded pin past the distal tip of the needle causes the actuator to disengage from the needle. The actuator is a rotatable actuator. A catheter-based embodiment of the device can be inserted in body passageways to access tissue internally within the body.
摘要:
Devices, methods, and systems for treating Type-2 Diabetes and/or obesity by facilitating the delivery of under-digested nutrients within the gastro-intestinal tract without substantial tissue removal are disclosed. In one aspect, the gastro-intestinal tract of a patient is modified by a gastro-intestinal treatment device comprising an elongate element configured to extend within the gastro-intestinal tract, a first attachment element and a second attachment element disposed on the elongate element, wherein the first attachment element and the second attachment element are configured to attach to the gastro-intestinal tract such that a portion of the gastro-intestinal tract is compressed between the first and the second attachment elements. The length of the gastro-intestinal tract modified by the device is effectively shortened, and its surface area is reduced.
摘要:
Devices systems and methods are disclosed for preventing or inhibiting secretions from entering the lumen of a functional assessment catheter for the lungs, or removing collected secretions. The catheter comprises an expandable element, a cover, or an internal component configured to prevent or inhibit secretion flow into the lumen. The catheter alternatively or additionally comprises a distal end configured to facilitate air flow, absorb secretions or repel secretions away from the catheter tip. The catheter alternatively or additionally comprises an internal element such as a coilable wire, or an obturator configured to prevent secretions from being drawn into the lumen, or to actively remove the secretions. The catheter alternatively or additionally comprises an element to dry, aerate or aspirate the lung passageways.
摘要:
Methods and systems for targeting, accessing and diagnosing diseased lung compartments are disclosed. The method comprises introducing a diagnostic catheter with an occluding member at its distal end into a lung segment via an assisted ventilation device; inflating the occluding member to isolate the lung segment; and performing a diagnostic procedure with the catheter while the patient is ventilated. The proximal end of the diagnostic catheter is configured to be attached to a console. The method may also comprise introducing the diagnostic catheter into the lung segment; inflating the occluding member to isolate the lung segment; and monitoring blood oxygen saturation. The method may further comprise introducing the diagnostic catheter into the lung segment; determining tidal flow volume in the lung segment; determining total lung capacity of the patient; and determining a flow rank value based on the tidal flow volume of the lung segment and the total lung capacity.
摘要:
Methods, system and apparatus for relieving pressure in an organ such as, but not limited to, the eye are disclosed. The method includes implanting a bioabsorbable channel into the selected area of the organ using a delivery apparatus.