236 results about "Venipuncture" patented technology

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.

A venipuncture site protector that includes a securement and a cover mounted to said securement. The cover includes a proximal end having a front wall with a tube receiving slot. The cover also includes a distal end having an arch that forms an opening that lies on a vertical plane that is substantially perpendicular to the securement.

A portable vein viewer apparatus may be battery powered and hand-held to reveal patient vasculature information to aid in venipuncture processes. The apparatus comprises a first laser diode emitting infrared light, and a second laser diode emitting only visible wavelengths, wherein vasculature absorbs a portion of the infrared light causing reflection of a contrasted infrared image. A pair of silicon PIN photodiodes, responsive to the contrasted infrared image, causes transmission of a corresponding signal. The signal is processed through circuitry to amplify, sum, and filter the outputted signals, and with the use of an image processing algorithm, the contrasted image is projected onto the patient's skin surface using the second laser diode. Revealed information may comprise vein location, depth, diameter, and degree of certainty of vein locations. Projection of vein images may be a positive or a negative image. Venipuncture needles may be coated to provide visibility in projected images.

A venipuncture assistor for use in inserting a needle into a patient's vein in order to draw blood or to carry out an intravenous treatment of some type. The distended. vein is received in a pair of substantially rigid, spaced, opposing notches in the bottom edge of the cylindrical body of the assistor. The notches are preferably spaced about 16 mms. from each other. The space between notches is substantially free of any member that contacts the vein segment being punctured. The edges of each notch and the bottom edge of the assistor are free of any sharp protuberances. The assistor keeps the vein segment being punctured from moving laterally out of the path of the needle that is being introduced into the vein segment. It is preferably made of a transparent plastic material.

Improvements in blood collection and testing. In one aspect, an improved method of manufacturing a blood collection tube, particularly illustrated for use in sedimentation rate testing, including providing an elongated glass tube with an open first end for receiving a venipuncture blood sample of at least 1 ml, formed with a closed end opposite the first end; and applying to a substantial portion of the receptacle a containment barrier. The improvements also pertain to resulting blood collection tubes, additives for blood collection tubes that permit reliable sedimentation test data after 8 hours from the blood draw, and methods of administering health care using the aforenoted tubes, additives or both.

A skin puncture device for use as an intravenous catheter or blood collecting needle set is provided with a mechanism for protection against needle injury and access to fluid passageway during insertion. The assembly includes a flexible extension tube connected to the proximal end of the needle housing for use in difficult insertion sites. The extension tube provides access for fluid injection so that the passageway and needle can be filled with fluid prior to needle/catheter insertion, allowing diffusion of blood to provide evidence of successful venipuncture and allowing the infusion of small amounts of fluid into the vein to facilitate catheter advancement. The locking mechanism consists of two apertures in the needle housing and two pairs of needle guard locking tabs which selectively engage when the needle guard is pushed forward to its fully extended position upon completion of insertion or blood drawing, encapsulating the length of the needle.

A multipurpose site guard for use at all peripheral and central venipuncture infusion sites, sensitive areas, and for pediatric and adult patients. The guard is a hollow plastic member with a base and a sidewall curved upwardly and inwardly to form a cover which is form fitted to the infusion site under finger pressure and which can be taped in place. Improvements to this invention include holding the guard in place with a fabric connector having closure means and cushioning the guard's base with a soft material.

The invention discloses an arteriovenous simulation method and device used for puncture teaching. According to the device, two latex tubes, namely a first latex tube and a second latex tube, are arranged on an emulational arm to respectively simulate an arterial blood vessel and a venous blood vessel, a diaphragm pump is used to extract emulational blood from a liquid storage container, and pumps the emulational blood to the first latex tube; after flowing through the first latex tube, the emulational blood enters the second latex tube through a throttle valve, and finally the emulational blood returns back to the liquid storage container through the second latex tube, so that a simulated blood circulation system is formed; a brushless DC motor is controlled to be started/stopped intermittently to drive the diaphragm pump, so that the first latex tube can shrink and expand intermittently to simulate human pulse beat; after the emulational blood flows through the throttle valve, expansion and shrinkage frequency reduces, even expansion and shrinkage disappear, so that the second latex tube can simulate a human venous blood vessel; when puncture teaching is needed, the two latex tubes on the emulational arm are respectively punctured by an injection syringe needle, so that arterial puncture and venipuncture simulation trainings are realized.

The invention relates to an identification method and a prompting system for depth of a vein blood vessel. The identification method and the prompting system solve the problem that judgment of the depth of the blood vessel cannot be carried out in the prior art. The identification method and the prompting system have the advantages that a mapping relationship between the image mode and the depth of the blood vessel is established by a machine learning regression module in machine visual learning according to the image of the vein blood vessel, so the depth of the blood vessel is automatically identified on the basis of images; the information of the depth of the blood vessel is prompted by voice and projection, and a medical staff can position the blood vessel, and can also determine the depth of the blood vessel, so the needle entry angle is accurately controlled, the success rate of vein puncturing is improved, and the pain of a patient due to the vein puncturing is reduced.

The present invention provides a simple auto electronic tourniquet which does not inflict pain on a person receiving tourniquet in the preparatory stage before venipuncture and which shorten the time required in preparation for venipuncture. The simple auto electronic tourniquet includes a manchette (wrapping member) wrapped around the upper arm and a controller provided on the manchette for controlling pressures to the upper arm by the wrapping member. The controller includes a diastolic blood pressure detecting circuit and a pressure setting and maintenance circuit The pressure setting and maintenance circuit setting pressures of the manchette at the time when changes of the biological signal are detected by the diastolic blood pressure detecting circuit as target pressures.

Provided is a pressure bandage suitable for achieving complete hemostasis at a venipuncture site. The bandage includes an adhesive backing, upon which a non-compressible, absorbent pad is centrally affixed. The backing is inelastic, which along with the non-compressible pad, provides a non-resilient dressing capable of applying the pressure necessary to achieve hemostasis. The pad typically comprises a plurality of plies of dense cotton gauze. The pressure bandage may be applied by one individual, quickly and efficiently, at a low cost.

The invention discloses a disposable automatic heating and pressurizing transfusion device comprising a closed vessel containing sterile liquid. The disposable automatic heating and pressurizing transfusion device is characterized in that the closed vessel is internally provided with a piston which divides the closed vessel into an upper part and a lower part, wherein the capacity of the upper part is larger than that of the lower part, the upper part is a liquid bin in which the sterile liquid is closed in advance, and a vacuum chamber at the lower part is internally provided with a pressurizing device which is connected with the center of the bottom surface of the piston; a medicine adding device is arranged at one side of the top of the liquid bin, and a transfusion rubber tube is led out from the other side of the top of the liquid bin and is connected with a venipuncture needle head; and a heating device is arranged at the periphery of the radial bin wall of the liquid bin. The invention can control the transfusion quantities and the transfusion speed and automatically heat under the cold condition, has simple and convenient administration operation, flexible administration, no secondary pollution, small volume, light weight, convenient carrying, and is particularly suitable for relieving a sick or injured person in field operation and doing rescue and relief work in the field under the cold condition, thereby realizing transfusion in a narrow space.

A device and method for monitoring an access to a patient for an extracorporeal blood treatment apparatus with an extracorporeal blood circuit are described, as well as an extracorporeal blood treatment apparatus with a device for monitoring the vascular access. The device and method are based on the monitoring of a characteristic property of the blood, in particular the concentration of haemoglobin in the blood flowing in the arterial blood line of extracorporeal blood circuit I of an extracorporeal blood treatment apparatus A. In the event of an incorrect vascular access, the flow conditions change in the communicating intra- and extracorporeal blood circulation system. These changes in the flow conditions can be detected as a change in the haemoglobin concentration. A disconnection of venous puncture cannula for the patient access is ascertained by a reduction in the haemoglobin concentration in the blood in arterial blood line.

The invention discloses a directing apparatus for venous blood vessel piercing, which is a venous blood vessel image-forming system comprising a rectangular near-infrared transmitting tube, a cylindrical near infrared ray receiver, a square monitor and a DC power source. During real time operation, the image signals can be transmitted to the monitor.

The invention relates to the field of medical instruments, in particular to an arteriovenous puncture instrument, which comprises a system computer, color ultrasonic diagnosis software or a portable ultrasonic diagnosis instrument, cross-shaped cursor positioning display software, cursor positioning computation confirmation sound and misplacement alarm sound software, and is characterized in that: a puncture positioning connecting rod 1-2 is a sterile assembly which is positioned and assembled in a sliding piece interface 1-16 of the arteriovenous puncture instrument; an ultrasonic transducer 1-1 is used for transmitting ultrasound for acquiring arteriovenous blood vessel positioning data; a computer ultrasonic transduction assembly 15 is used for performing data conversion on information of a three-dimensional positioning-sensing assembly 1-11; and a three-dimensional positioning sliding piece 1-12 is used for automatically or manually controlling the sterile puncture positioning connecting rod 1-2 to position and puncture arteriovenous blood vessels. Due to the adoption of the arteriovenous puncture instrument, puncture treatment can be guided quickly and accurately, the puncture accuracy is increased, the puncture difficulty is lowered, the efficiency is increased, important organs are prevented from being hurt accidentally, surrounding tissue damage and complicating diseases are reduced, and the first aid success rate is increased.

The invention discloses a compression hemostasis device capable of preventing haemorrhage after arteriopuncture and venipuncture. The compression hemostasis device disclosed by the invention comprises an inflation air sac, a hand pressure aerator and a compression device, wherein the hand pressure aerator is communicated with the inflation air sac; and the upper part of the compression device is of a hollow tubular shape and is communicated with the inflation air sac, and the lower part is of an upside-down bowl shape. Compared with the prior art, the compression hemostasis device disclosed by the invention has the following beneficial effects that: 1, a surgery doctor can autonomously adjust pressure for hemostasis according to the practical situation of a patient, a stable hemostasis pressure is provided for the patient, labour intensity of a doctor is greatly alleviated, and success rate of postoperation hemostasis on the patient is improved; and 2, the compression hemostasis device is convenient to use and is healthy.

The invention relates to a safe blood taking needle. The safe blood taking needle comprises a needle seat, a double-head needle tube, a safe jacket, a connecting mechanism and a clamping seat, wherein the double-head needle tube penetrates in the needle seat; one end of the double-head needle tube is a venipuncture needle; the other end of the double-head needle tube is an intubation needle; the clamping seat is fixed on the needle seat; the safe jacket is connected to the clamping seat through the connecting mechanism, can rotate around the connecting mechanism and is a hollow cavity; and at least one needle tube safe hook is arranged in the cavity. The safe blood taking needle has the advantages that the problem of accidental needle puncture in the prior art can be effectively solved, and the risk that medical staffs contract diseases due to accidental needle puncture is avoided.

The invention relates to an intravascular mild hypothermia therapy device which comprises a normal saline storage box, a first pipeline, an electronic refrigerator, a second pipeline, a central venous catheter and a third pipeline. The normal saline storage box and the electronic refrigerator are communicated through the first pipeline. The electronic refrigerator and the central venous catheter are communicated through the second pipeline. The central venous catheter and the normal saline storage box are communicated through the third pipeline. A pushing pump is arranged on the second pipeline. The liquid inlet end of a honeycomb meshed heat exchange pipe inside the electronic refrigerator is communicated with the first pipeline, and the liquid outlet end of the honeycomb meshed heat exchange pipe is communicated with the second pipeline. Normal saline inside the normal saline storage box is conveyed by the pushing pump into the honeycomb meshed heat exchange pipe and then cooled by an electronic refrigeration sheet into low-temperature normal saline, one end of the central venous catheter enters a lower plenum central vein from a human body femoral vein puncture opening, a temperature difference between the circularly-flowing normal saline and blood inside the central venous blood vessel, and heat exchange between the surface of the central venous blood vessel and the blood in the patient blood vessel is performed.