1053 results about "Needle insertion" patented technology

The invention relates to a needle insertion device comprising a housing with a mounting surface adapted for application to the skin of a subject, where the mounting surface defines a general plane and has a needle aperture formed therein. Adhesive means is arranged on the mounting surface for adhering the insertion device to the skin of the subject, the adhesive means surrounding the needle aperture. A needle comprises a distal pointed end adapted to penetrate the skin of the subject, the pointed end being arranged within the housing in respect of the general plane. The mounting surface surrounding the needle aperture is moveable between a first position in which the pointed end of the needle is arranged within the housing, and a second position in which the pointed end of the needle projects through the needle aperture, thereby pulling the skin portion corresponding to the intended site of needle insertion against the needle.

An electrical impedance probe is provided that includes a surgical needle. In an exemplary embodiment, the probe is a two-part trocar needle designed to acquire impedance measurements at its tip. The impedance measurements are representative of the local properties of a biological substance at the needle tip. Thus, the probe may be used to confirm needle insertion into a desired anatomical target or to identify the nature of the cells surrounding the tip of the needle. In urology, this sensor is used for confirming the needle insertion into the urinary tract, for localizing renal cell carcinoma, and prostate cancer.

A robotic system for overlapping radiofrequency ablation (RFA) in tumor treatment is disclosed. The robot assisted navigation system is formed of a robotic manipulator and a control system designed to execute preoperatively planned needle trajectories. Preoperative imaging and planning is followed by interoperative robot execution of the ablation treatment plan. The navigation system combines mechanical linkage sensory units with an optical registration system. There is no requirement for bulky hardware installation or computationally demanding software modules. Final position of the first needle placement is confirmed for validity with the plan and then is used as a reference for the subsequent needle insertions and ablations.

A housing may have a needle, plunger, and bias mechanism supported within the housing by a tab configured to retain the plunger in position and to allow the plunger to move under bias force imparted by the bias mechanism to move the needle to an insert position when the tab is removed. A base and a structure may be configured for relative movement there between and may be adapted to be secured to a user with a cannula extending through a body of the structure into the user during use of a medical device. A housing may be adapted to be secured to a user to support a medical device operable with an insertion needle, the housing having a magnifying material for increasing visibility of an injection site.

An infusion medium delivery system, device and method for delivering an infusion medium to a patient-user, includes a needle inserter device and method for inserting a needle and / or cannula into a patient-user to convey the infusion medium to the patient-user. The needle inserter device and method operate to insert a needle and cannula into a patient-user's skin and automatically withdraw the needle from the patient-user, leaving the cannula in place and in fluid flow communication with a reservoir. The delivery device may include a base portion and a durable portion connectable to the base portion, and wherein the base portion can be separated from the durable portion and disposed of after one or more specified number of uses. The base portion supports the reservoir and the needle inserter device, while the durable portion supports a drive device for selectively driving the infusion medium out of the reservoir and into the needle and / or cannula.

A modular biopsy, ablation and track coagulation needle apparatus is disclosed that allows the biopsy needle to be inserted into the delivery needle and removed when not needed, and that allows an inner ablation needle to be introduced and coaxially engaged with the delivery needle to more effectively biopsy a tumor, ablate it and coagulate the track through ablation while reducing blood loss and track seeding. The ablation needle and biopsy needle are adapted to in situ assembly with the delivery needle. In a preferred embodiment, the ablation needle, when engaged with the delivery needle forms a coaxial connector adapted to electrically couple to an ablating source. Methods for biopsying and ablating tumors using the device and coagulating the track upon device removal are also provided.

An injector is automatic in that the needle is inserted into the injection site (e.g., a patient's skin) with user or caregiver assistance, the delivery is automatically initiated upon needle insertion, and the needle is retracted automatically after the end of delivery. Preferably the needle is not seen by the user prior to, during or after injection. Prior to and after injection, the needle is hidden in the device so as to avoid any potential injury or health risk to the user or health care provider. The injector includes a housing and a shield arranged to slide relative to the housing and a driver moving during drug delivery. The housing and shield form a cartridge enclosure. The cartridge is shielded and locked after delivery is completed. A needle-locking mechanism can be used in any number of pen-like injectors or safety needles.

A portal access device that is adapted to provide long term access to a port implanted in a patient has two major components, an infuser assembly and a safety needle insertion device. The infuser assembly has an infuser housing that can be configured into a specific shape, for example a dome. A blunt cannula is attached to and extends downwardly from the underside of the infuser housing. Also connected to the infuser housing, preferably at a side thereof, is a tubing or catheter. The safety needle inserter assembly has a base having a proximal portion that is configured to form fit over the infuser housing. At the distal portion of the base uprights are provided so that a second end of an arm, to which first end a needle or a sharp cannula is connected, may be movably and hingedly connected to the base. The sharp cannula extends from the underside of the proximal end of the arm and passes through the base by way of a bore formed at the proximal portion of the base. The bore is defined between an opening at the underside of the base and an opening at the upper surface of the base. Locking mechanisms are provided at the base uprights and the distal end of the arm so that when the arm is moved away from the base, and as the distal end of the arm pivots about the uprights, the respective locking mechanisms provided at the arm and the base would coact to lock the arm in place, to thereby maintain the tip of the needle within the bore formed in the base. To use, the safety needle inserter is placed over the infuser assembly, with the sharp cannula extending through the infuser housing and axially mating with the blunt cannula of the infuser assembly, but with the tip of the sharp cannula protruding beyond the tip of the blunt cannula. The combined needle inserter / infuser assembly is pressed down onto the skin surface of the patient so that the combination sharp / blunt cannulas penetrate the patient and puncture the self-sealing septum of a portal reservoir implanted in the patient. Once the safety needle inserter is removed from the infuser assembly, with the infuser housing septum being self-sealing, a closed fluid communication path is established between the portal reservoir and a fluid store that may be connected to the catheter of the infuser assembly. Long term access of the implanted portal reservoir is thereby achieved.

An implantable venous access port for a catheter. The port assembly (100) includes a body (102), a septum (134) for needle insertion, a discharge port (150) having a passageway (154) and to which a catheter proximal end (202) is connected, and a proximal port (170) with a proximal passageway (172,116) that is in line with the discharge port passageway (154). A chamber (118) of the port body (102) fluidly connects the proximal port passageway and the discharge port passageway, and a proximal septum (174) traverses and seals the proximal passageway (172,116). An entry cannula (190) is insertable into the proximal opening and penetrates the proximal septum (174) and extends to the discharge port passageway (154) enabling a guide wire (198) to be inserted therethrough after the port (100) has been connected to the catheter (200), whereafter the entire assembly is implantable into a patient over the guide wire. A method of over-the-wire venous port placement is disclosed, and also a method for assembling the port.

An injector is automatic in that the needle insertion into the injection site (e.g., a patient's skin) is triggered by the user or caregiver, the insertion is automatic, the following delivery is automatically initiated upon needle insertion, and the needle is shielded automatically after the end of delivery. Preferably the user does not see the needle prior to, during, or after injection. The injector includes a proximal and distal housings and a needle shield arranged to slide on the distal housing. The injector has a driver arranged to move the syringe to cause the needle penetration, to inject the drug, and subsequently to release the shield. The syringe needle is shielded and the shield locked automatically after delivery is completed. The patient does not experience any injector force on the tissue during injection. The injector has built in patient safety features.

After pressing a part of the exterior of a body of an administration instrument against a body region of a patient to which a drug solution is to be administered, an injection needle that is housed in the instrument body is automatically protruded from the body to insert the needle into the body region, and further, the injection needle being inserted into the body region is automatically housed in the instrument body to remove the needle from the body region. Thereby, the pain of the patient during needle insertion and needle removal is reduced, and administration at a constant speed is possible during injection of the drug solution. Furthermore, even when two kinds of drug solutions or a dissolving and mixing type drug solution are / is used, mixing can be easily and reliably carried out.

Improved medical suturing devices, systems, and methods may hold a suture needle at a fixed location relative to a handle of the device, allowing the surgeon to grasp and manipulate the handle of the suturing device to insert the needle through tissues in a manner analogous to use of a standard needle gripper. Cycling the handle from a closed position to an open position and back to the closed position may alternate the device between gripping the needle with a first clamp (for example, along a proximal portion of the needle) to gripping the needle with a second clamp (for example, along a distal portion of the needle) and optionally back to gripping with the first clamp, with the needle often staying at a substantially fixed location relative to the suturing device body. Related single-clamp needle grasping devices can be bent plastically by a surgeon, and / or have bodies that are grasped by a hand while a portion of the hand actuates a handle.

An example apparatus places translaminar screws across a facet joint between adjacent first and second vertebrae in a minimally invasive surgical procedure. The apparatus includes a first K-wire, a second K-wire, a first fixation block, a second fixation block, a support block, a first rod member, a second rod member, and a cannula. The first K-wire is inserted into the spinous process of the first vertebrae. The second K-wire is inserted into a transverse process of the second vertebrae. The first fixation block has perpendicularly extending first and second passages. The first K-wire extends into the first passage in the first fixation block. The second fixation block has perpendicularly extending first and second passages. The second K-wire extends into the first passage in the second fixation block. The support block has perpendicularly extending first and second passages. The first K-wire extends into the first passage in the support block. The first rod member extends through the second passage in the first fixation block and the second passage in the second fixation block. The second rod member further secures the first and second fixation blocks to the first and second vertebrae. The second rod member extends through the second passage in the support block. The cannula enables implantation of the translaminar screws across a facet joint between the first and second vertebrae.

This invention relates to a lancing apparatus (A1) used for inserting an insertion element (21) into a human skin (Sk) for sampling a body fluid. The lancing apparatus (A1) includes a housing (1) with a cylindrical portion (12) brought into contact with the skin (Sk), a negative pressure generator (6) that generates a negative pressure inside the cylindrical portion (12) to cause the skin (Sk) to swell upward, and a detector (5) that detects that the skin (Sk) has been raised to a predetermined height inside the cylindrical portion (12).

A robotic system for steering a flexible needle during insertion into soft-tissue using imaging to determine the needle position. The control system calculates a needle tip trajectory that hits the desired target while avoiding potentially dangerous obstacles en route. Using an inverse kinematics algorithm, the maneuvers required of the needle base to cause the tip to follow this trajectory are calculated, such that the robot can perform controlled needle insertion. The insertion of a flexible needle into a deformable tissue is modeled as a linear beam supported by virtual springs, where the stiffness coefficients of the springs varies along the needle. The forward and inverse kinematics of the needle are solved analytically, enabling both path planning and correction in real-time. The needle shape is detected by image processing performed on fluoroscopic images. The stiffness properties of the tissue are calculated from the measured shape of the needle.

The present invention relates to a lancing depth-adjustable lancing apparatus (1) for moving a lancing element (21) held in a housing (3) in a lancing direction (N1) to lance skin with the lancing element (21). The lancing apparatus (1) includes a lancing depth adjustment mechanism for adjusting lancing depth of the lancing element (21) in the skin. The lancing depth adjustment mechanism includes a displacing member (6) which is movable relative to the housing (3) in the lancing or the retreating direction (N1, N2), a cover (7) which is movable with the displacing member (6) in the lancing or the retreating directions (N1, N2), and a stepped portion (37) provided at the housing (3) for restricting the movement of the lancing element (21) in the lancing direction (N1) when the lancing element (21) moves in the lancing direction (N1).

Described is a device and method for administration of molecules to tissue in vivo for various medical applications, the device comprising a single-needle electrode which provides for the ability, when the needle is inserted into tissue, such as skin or muscle, to pulse tissue with a non-uniform electric field sufficient to cause reversible poration of cells lying along or in close proximity to the track made by the needle upon its insertion into said tissue

A catheter capture device comprising a urethral sound and a sleeve that utilizes balloon inflation to capture the catheter. A catheter capture device comprising a urethral sound and a clamshell device. The clamshell device comprises two halves, one of which comprises two pins. One pin passes through the lateral holes in the tip of the catheter, and the other pin fits into a notch in the bottom half of the clamshell device. A catheter capture device comprising a urethral sound, a sleeve and a pin that passes through the lateral holes in the tip of the catheter. A catheter capture device comprising a urethral sound, a wire and a nodule, wherein the nodule captures the catheter by lodging in the tip of the catheter. The nodule could be a ball, hook, crimped wire or similar object. A method of capturing a catheter in an obese or non-obese patient.

An apparatus and method for the insertion of a medical tool, for example a needle, within the human body. The apparatus and method are particularly useful in prostate brachytherapy and in prostate biopsy. The apparatus comprises a telescoping guide universally coupled to a first and second positioning means that are used to automatically and / or manually position the guide at a desired needle insertion trajectory. Automatic positioning of the guide is accomplished with reference to three-dimensional transrectal ultrasound images that can also be used to show needle insertion in real-time. The apparatus may be manually positioned in the approximate insertion trajectory and then a computer interconnected with the apparatus may be used to achieve the final trajectory based upon the ultrasound images. The apparatus is particularly useful in cases where multiple needles are to be inserted into a small target area and in cases where pubic arch interference prevents direct access to the target area.

A medical device includes a first housing portion (FHP) and a second housing portion (SHP) configured to be to be movable relative to each other from a first position to operatively engage at a second position to couple at least one of a drive device and a needle-inserting device supported by one of the FHP and the SHP to a reservoir supported by the other of the FHP and the SHP. Electronic circuitry configured to detect at least one of a first magnetic interaction between a magnet and at least one of a first magnetically attractive material and a first magnet-responsive device and a second magnetic interaction between the magnet and at least one of a second magnetically attractive material and a second magnet-responsive device, and to provide a signal or a change in state in response to detecting at least one of the interactions.

In an aspect, a medication delivering injector which includes a housing having opposing proximal and distal ends and an accessible internal cavity for inserting and removing a medicament container such as a syringe. The injector is designed to hold and manipulate a medication delivery device such as a large variety of standard and non-standard medical syringes with fixed or attached needles, assembled such that centrally located is a cylinder containing a liquid medicament and attached either permanently or removably to the distal end of the cylinder, is a hypodermic needle or cannula in fluidic communication with the cylinder. The needle can be from one-half inches to one-and-one-half inches in length in the illustrated embodiment and other sizes are possible by changes in scale of the injector. At the proximal end of the cylinder is an opening with an inserted seal or bung with an attached rod thus constituting a plunger. The central medicament containing cylinder could also be a standard medicament cartridge. Hereinafter, both are referred to as a “syringe”. A lid or access cover which, in an open position permits insertion and removal of the syringe into / from the housing in a horizontal fashion thus providing ease of loading. The syringe is inserted with the needle end toward the distal end of the housing and the plunger toward the proximal end of the housing. A movable carriage is disposed in the proximal end of the housing and slides in the axial direction forwards and rearwards such that a syringe, whose proximal end is gripped by the carriage, so moves with the carriage such that the needle exits the housing at the distal end of the housing and pierces the tissue of the patient prior to dispensing of the medicament, and then is retracted after the medicament has been dispensed by retraction of the carriage. Attached to the carriage is an actuator which pushes on the syringe plunger causing the medicament contained within the syringe cylinder to be dispensed through the needle into the patient's tissue. In one embodiment suitable for both removable needle and fixed needle syringes, the proximal end of the syringe including the syringe finger flange is gripped by an elastomeric flange grip which resides within the carriage, while the syringe distal end resides in and is supported by a “syringe guide” which is attached to the carriage and thus moved with it. In another embodiment which is so made to accommodate syringes with removable needles and their safe disposal, the syringe flange at the proximal end of the cylinder is gripped by an elastomeric flange grip which resides in the carriage as described above, while the syringe distal end is supported by a needle which resides in a removable disposable needle shield. The needle guide is biased toward the carriage and thus, the syringe body is compressed and guided as the carriage moves forward and rearward.Both the movement of the carriage and the actuator are controlled by servo motors which are controlled by electronics and a microcontroller so operating such that speeds and accelerations are controlled smoothly and gently so as to avoid the stop / start motion of motors controlled by limit switches and simple electronics or the vibration and abruptness such as result from injectors powered by compressed springs or gas. Furthermore, the forces are adaptive to the loads imposed and the requirements necessary for the proper dispensation of medicaments with high viscosity or sensitivity to shear forces.The housing, approximately midway between proximal and distal ends, is affixed by a hinge such that the device can be folded in half to provide for a more compact device to be stored and transported.On the distal end of the housing are electrical sensor pads in communication with the microcontroller such that contact with the patient's skin and the angle at which the injector is held against the skin and the steadiness with which the injector is being held can be ascertained. Within the housing are a haptic vibrator and an audio speaker, both producing a vibration which is variable in pitch in such a manner that biofeedback is provided to the injector user as to the pressure, angle and steadiness with which they are holding the injector against the skin. This facilitates the action of injection oneself in the gluteus muscle where visual feedback isn't available to the patient.Multiplexed onto the electrical sensor pads, is a TENS (Transcutaneous Electrical Nerve Stimulation) generator which is operational (at the user's choice) just before and during the injection to interrupt or quench the pain of tissue perforation often accompanied with needle injections.Contained on the surface of the housing such as on the access cover, is a display such that user menus, device state, directions, and battery charge status, etc. are displayed. Also contained on the surface of the housing, on the proximal half, are buttons which control the menus and selections that are shown on the display. These selections provide for the user to set such parameters as hypodermic insertion speed and medicament dispensing speeds, the preferred mode of user biofeedback which can include: speech mode (which can be accompanied by musical themes and ringtones, plus variable pitch tone and haptic vibration), MP3 mode (which has speech muted but includes musical ringtones and variable pitch tone and haptic vibration), and haptic mode (which is haptic vibration and audio tone queues needed for injector position biofeedback and readiness), plus mute mode (which provides no audio but the haptic vibration remains), and none, which provides no vibrational biofeedback, yet the display information always remains available.Also contained on the surface of the housing on the distal half, is an “injection initiate” button which causes the sequences required for performance of an injection to occur if said button is “enabled”.Contained within the electronics and its operating program is the ability to audibly play pre-recorded human speech in any language such that: directions in the form of consecutive steps which are required to load the medicament container (syringe) into the device, consecutive steps to perform an injection, steps to remove and properly dispose of parts, to alert of device status and menu choices, etc. can be played through the audio speaker. Also contained within the electronics and program is the ability to play musical ringtones as a distraction during the needle insertion and injection or when a scheduled injection alarm is reached, or calming human voice exhibiting bedside manner during the needle insertion and injection.Also contained within the electronics and software is a real-time clock-calendar which can store a patient's injection schedule and play a musical ringtone as an alarm as each scheduled injection becomes due. Also contained within the electronics and software are the ability to communicate with a personal computer through a USB port, which can also charge the injector's rechargeable battery. The battery in one embodiment, consists of three AAA batteries which can be rechargeable or non-rechargeable. The USB port in combination with an application running on the personal computer, is used to download the injection schedule into the real-time clock-calendar and to download ringtones and musical themes of the user's choice and to download foreign language sets for the pre-recorded human language feature.The injector can be further equipped with the capability to aspirate the tissue by drawing back on the plunger thus creating a vacuum into which fluids will flow. These fluids enter the syringe cylinder where they can be checked for the presence of blood by optical absorption in the red spectrum. This information is useful in the instances where intramuscular injections are to be given with drugs whose ‘Full Prescribing Information’ instructs the patient to aspirate and check for blood in the syringe which indicates that the puncture of a vein has occurred, and if so detected, to abort the injection and then re-inject into a different location.

In one embodiment, a malleable needle is provided at least three independent electrodes to facilitate the implantation of an electrical stimulation lead for peripheral nerve stimulation. The malleable characteristic of the needle enables the needle to be bent or shaped according to the patient anatomy. Once the needle is appropriately shaped by the physician, the physician inserts the needle into a prospective site for stimulation. The provision of the electrodes enables a suitable number of electrode patterns to be tested to determine whether the stimulation site is satisfactory. By utilizing the malleable needle in this manner, a number of stimulation sites can be tested in an efficient manner to identify an optimal location for implantation of the stimulation lead.

The present invention is a holder assembly having a holder housing, collar and safety shield. The safety shield is pivotably attached to the collar. The collar is receiving within a recess defined by the annular skirt and needle receiving port of the holder housing. The collar and attached safety shield may thus be rotated about the holder housing and an attached needle assembly, thereby allowing a user to freely position the safety shield during needle insertion and preventing the dislocation of safety shield from the holder housing.

Improved medical suturing devices, systems, and methods may hold a suture needle at a fixed location relative to a handle of the device, allowing a surgeon to grasp and manipulate the handle of the suturing device to insert the needle through tissues. The exemplary device includes two needle grasping clamps extending from an elongate distal portion for endoscopic surgeries, including ear, nose and throat procedures. The two clamps alternate holding the suture needle, as the surgeon sutures the tissues, each clamp having a proximal and distal gripping jaw for grasping the needle. Preferably, the gripping surfaces of the proximal and distal gripping jaws are substantially parallel to the needle's plane of curvature and exert a holding force on the needle substantially along an axis of the device.

A lancing device (X) comprising a first moving member (32) holding a lancing member (11) moved from a standby position to a puncturing position in a puncturing direction (N1), for puncturing a target portion by the lancing member (11). The lancing device (X) further comprises a second moving member (31) connected to the first moving member (32), for controlling the movement of the first moving member (32) upon the movement of the second moving member, and also comprises an impact absorbing means (23A) for absorbing impact that is caused when the first and the second moving members (31), (32) come to stop on puncture operation. The impact absorbing means (23A) includes an elastic member (23Ab) for absorbing impact by elastic deformation.