摘要:
Various examples are described for needle alignment for wearable biosensors. One example device includes a housing comprising an upper portion and a lower portion, the housing defining a cavity between the upper portion and the lower portion and configured to be worn on a wearer's skin, wherein: the upper portion defines a first opening extending through the upper portion to the cavity, and the lower portion defines a second opening extending through the lower portion to the cavity, the cavity establishing a substantially unobstructed pathway including the first opening and the second opening to enable an insertion needle to be inserted through the housing; and a needle guide extending into and along a portion of the pathway and aligned with a sensor wire to enable alignment between the insertion needle and the sensor wire.
摘要:
The invention relates to sensing compositional information about material by measuring thermal properties of the material. In one arrangement there is provided a needle probe for sensing compositional information. The probe comprises a needle (2) having a tip region. A resistive element (5) is attached to the needle at the tip region. A measurement system is configured to: 1) drive an electrical current through the resistive element to apply heating to the resistive element, and 2) measure an electrical response of the resistive element to the heating. A processing unit analyses the measured electrical response of the resistive element to the heating to determine compositional information about material in contact with the tip region.
摘要:
A device (1) for the direct detection of the endovascular pressure of a fluid in a vessel allows increasing the measuring accuracy, both related to static and dynamic quantities, detected through an air column which inside capillary ducts, is in contact with the endovascular fluid which exerts its pressure thereon, by separating at the same time such air column from outside in each process phase, and then by preventing that the fluid, the pressure thereof has to be measured, is polluted or infected thereby, and comprising, to this purpose, a connector (5) with a valve (13, 14), which defines a connection terminal cavity (63) which is arranged outside a needle-holding element (11) and is in fluid communication with said one or more capillary ducts (16) through a duct (6) extending from said needle-holding element (11) to said connector (5); and a re-usable element (2) including at least a pressure sensor (25) and comprising means for connecting to said connector (5) at said terminal cavity (63) of the disposable portion (3), apt to put into communication an inner space (50) of said re-usable element (2), which receives said at least a pressure sensor (25), with said terminal cavity (63), the opening of said valve (13, 14) being determined by the connection between the re-usable element (2) and said disposable portion (3).
摘要:
In various examples, a stimulation needle apparatus is used for selectively administering a trial stimulation to body tissue of a patient. The stimulation needle apparatus includes a cannula assembly including a cannula and a cannula hub disposed at a proximal cannula end. A stylet assembly includes a stylet sized and shaped to fit within a cannula lumen. A stylet hub is disposed at the proximal stylet end and is configured to engage with the cannula hub. With the stylet hub engaged with the cannula hub, the distal stylet end extends distally from the distal cannula end. A stylet connection is electrically coupled with the stylet and is configured to electrically couple with a stimulator device, such that, a stimulation pulse delivered by the stimulator device is conducted from the stylet connection through the stylet to the distal stylet end to administer the trial stimulation.
摘要:
Systems for applying a transcutaneous monitor to a person can include a telescoping assembly, a sensor, and a base with adhesive to couple the sensor to skin. The sensor can be located within the telescoping assembly while the base protrudes from a distal end of the system. The system can be configured to couple the sensor to the base by compressing the telescoping assembly.
摘要:
This application provides a medical guidance device with an inertial measurement unit and a mechanical interface. This device can provide accurate and precise orientation of insertable medical tools is critical in surgical procedure, such as for placement of a needle-like instrument according to plan based on medical images (e.g., computed tomography (CT) and Magnetic Resonance Imaging (MRI)) in percutaneous interventions.
摘要:
A pair of cooperating catheters are used together to provide rapid access to the Left heart for diagnostic or therapeutic interventions. The initial entry point for the catheter pair is the groin. The pair of catheters can be used to carry out an electrographic determination of the location of the Fossa Ovalis on the septum. Features on the Catheter system permit quick and reliable confirmation of the catheter location via echo or x-rays. Once across the septum the inner catheter is removed from the outer catheter and a standard intervention may be carried out through the lumen of the outer catheter.
摘要:
A calibration apparatus is provided for calibrating a medical tool having a tool tracking marker. The medical tool and the calibration apparatus are for use with a medical navigation system. The calibration apparatus comprises a frame, a frame tracking marker attached to the frame, and a reference point formed on the frame. The reference point provides a known spatial reference point relative to the frame tracking marker.
摘要:
The present invention relates to instruments and methods related to the in vivo analytical performance of percutaneously implanted, nitric oxide (NO)-releasing amperometric glucose biosensors. Needle-type glucose biosensors can be functionalized with NO-releasing polyurethane coatings designed to release similar total amounts of NO for rapid or slower (greater than 3 day) durations and remain functional as outer glucose sensor membranes. Relative to controls, NO-releasing sensors were characterized with improved numerical accuracy on days 1 and 3. Furthermore, the clinical accuracy and sensitivity of rapid NO-releasing sensors were superior to control and slower NO-releasing sensors at both 1 and 3 days implantation. In contrast, the slower, extended NO releasing-sensors were characterized by shorter sensor lag times ( 5.8 min) at 3, 7, and 10 d. Collectively, these results highlight the potential for NO release to enhance the analytical utility of in vivo glucose biosensors. Thus, the analytical performance benefit is dependent on the NO-release duration.