9 results about "Implantable Catheters" patented technology

The invention relates to an implantable catheter able to generate an autonomous flow of liquid therein, formed by a tubular body (1) in which is defined an internal structure (2) that determines two separate conduits (3-3') defining two lumens which, at one end, open at different points and therefore at a different height of the cavity in which the catheter is disposed, one conduit being larger than the other. The flow moves naturally in the cavity or system by means of a pressure gradient existing along same. This pressure gradient is transmitted through the holes of each conduit of the catheter, meaning that the pressure at a given moment is different in each end hole, generating an autonomous flow not actively forced through the catheter. This continuous flow of biological fluid can be used to administer drugs in a controlled manner, filter fluid, etc. By interposing one or more valves in one or more lumens or interposed devices, the flow can be made predominantly one way or the speed of the liquid can be altered.

The present invention relates to an implantable catheter - type blood oxygen meter and its monitoring method, which is applicable to continuous blood oxygen monitoring of the central vein or artery of the human body. The blood oxygen meter includes a flexible catheter body, an optical sensing element, a signal processing unit, a wireless transmission unit, and a power supply component. The optical sensing element is arranged in the inner cavity or wall of the catheter, and includes a transmitting end for emitting light signals of different wavelengths and a receiving end for receiving the light signals after absorption and scattering by blood, forming a transmission - type or reflection - type optical detection path. The signal processing unit collects the light intensity signals output by the receiving end, and calculates the ratio of oxygenated and reduced hemoglobin in the blood according to the absorption characteristics of multi - wavelength light, generating a blood oxygen saturation signal. The wireless transmission unit sends the blood oxygen signal to an external device for display or alarm, and the power supply component can use a micro - battery or catheter - powered mode to supply power to the system. The present invention realizes continuous, high - precision, and low - interference blood oxygen monitoring in the body.

A crimp tool facilitates crimping a resiliently radially compressible human-implantable catheter pump, and transferring the crimped pump into a tubular transfer sheath, by pulling the heart pump through an elongated tube that defines a tapered longitudinal bore. The bore has an inside dimension that tapers gradually along the length of the bore. A large end of the bore is sufficient to accept an uncrimped heart pump. A small end of the bore has a dimension similar to an inside dimension of the transfer sheath. A proximal end of the tube has a hub. A proximal end of a bore through the hub is configured to receive a distal end portion of the transfer sheath coaxially with the tube bore. Optionally, a latch is configured to releasably restrain the distal end portion of the transfer sheath within the hub.

The liquid conveying device comprises a liquid storage device, a filter and a liquid conveying pipeline, a liquid inlet and a liquid outlet are formed in the liquid storage device, the filter comprises an inlet and a plurality of outlets, the inlet is communicated with the liquid outlet, the outlets are all communicated with the inlet, the filter comprises a first circulation section and a second circulation section, and the first circulation section and the second circulation section are arranged at an angle. A circulation cavity is formed in the first circulation section, a plurality of circulation channels which are arranged at intervals are formed in the second circulation section, the circulation channels are all communicated with the circulation cavity, and the ends, away from each other, of the circulation cavity and the circulation channels are an inlet and an outlet of the filter respectively; the number of the liquid conveying pipelines is the same as that of the outlets, each liquid conveying pipeline comprises a flow limiting pipe and a liquid conveying pipe which are communicated with each other, the end, away from the liquid conveying pipe, of the flow limiting pipe is communicated with the corresponding outlet, and the end, away from the flow limiting pipe, of the liquid conveying pipe is used for being communicated with an implantable catheter. When the implantable catheter is provided with a plurality of connectors, the connectors can be dredged at the same time.

The present invention belongs to the field of automatic control technology, and particularly relates to a control system for a wireless implanted catheter-type blood oxygen meter; the system includes: a signal quality control module, a signal filtering control module, and a blood oxygen saturation analysis module; the signal quality control module is used to set the target average photocurrent of the photodiode of the wireless implanted catheter-type blood oxygen meter, control the wireless implanted catheter-type blood oxygen meter to operate at the target LED emission intensity, and ensure signal quality; the signal filtering control module is used to obtain the output signal of the photodiode, calculate the thermal noise and shot noise to synthesize the total noise power spectral density, and filter the output signal based on the total noise power spectral density to obtain a filtered signal; the blood oxygen saturation analysis module is used to calculate the corrected blood oxygen saturation; the present invention significantly improves the anti-interference ability, signal stability, and measurement accuracy of implanted blood oxygen monitoring, and can overcome the limitations of traditional methods.

An implantable medical system includes an implantable catheter advanceable into a coronary sinus of a patient's heart. A guide element and an implantable lead receivable in the side lumen is advanceable through an angled opening of the catheter to be deflected laterally away from the catheter at the deflection angle to position the at least one testing electrode or at least one pacing electrode, respectively, in a myocardium of the patient's heart when the distal portion of the catheter is positioned in the coronary sinus.

A crimping tool facilitates the crimping of a radially compressible, elastic human implantable catheter pump and the transfer of the crimped pump to a tubular transfer sheath by pulling the cardiac pump through an elongated tube that defines a tapered longitudinal bore. The bore has an internal dimension that gradually narrows along its length. A wide end of the bore is sufficient to accommodate an uncrimped cardiac pump. A narrow end of the bore has a dimension similar to the internal dimension of the transfer sheath. A connector is located at the proximal end of the tube. The proximal end of the bore, passing through the connector, is configured to receive the distal portion of the transfer sheath coaxially with the tube bore. Optionally, a latch is configured to releasably secure the distal portion of the transfer sheath within the connector.

To provide a catheter to be embedded in a cochlea and a cell transmission device.SOLUTION: A catheter to be embedded in a cochlea includes an embedded catheter body. Both ends of the embedded catheter body facing each other define a proximal end and a guide distal end. A central lumen is provided in the center of the embedded catheter body. An outer surface of the embedded catheter body is provided with at least one guide groove extending along a longitudinal direction of the embedded catheter body, and a plurality of horizontally oriented through holes penetrating the central lumen from the outer surface of the embedded catheter body. The embedded catheter body is configured to enter a cochlea of an internal ear of a patient and is bent along rotation of the cochlea of the patient, and a cell or a medicine as a treatment medicine passes the central lumen and the plurality of horizontally oriented through holes and enters the inside of the cochlea of the patient.SELECTED DRAWING: Figure 1