Subcutaneous infusion device and device for insertion of a cannula of an infusion device and method

The present invention relates to an infusion device for delivery of a substance to a patient. The present invention also relates to a device for assisting in the introduction of a cannula of an infusion device into the skin of a patient.

Infusion devices are used to deliver substances such as medications into the subcutaneous layer of skin of a patient. Typically, an infusion device includes a cannula that is introduced into the skin, as well as a tube extending from the infusion device to, for example, an infusion pump to deliver the substance.

In current designs, it is typically necessary to introduce a cannula of the infusion device into the skin while maintaining the device at a given orientation so that the tubing extends in a direction towards the infusion pump. Further, once the infusion device is placed on the skin, there is typically no way to reorient the device and associated tubing, or to remove the tubing from the body without removing the cannula from the skin of the patient. In addition, the profile of infusion devices can be undesirably high, making placement and concealment of the infusion device difficult and uncomfortable to wear. Also, introduction of the infusion device into the skin can be complicated and require two hands to accomplish.

In addition, devices for assisting in insertion of the cannula of an infusion device into the skin of the patient are known. For example, some devices utilize springs to automatically drive a needle into the skin of a patient to introduce the cannula of the infusion device into the subcutaneous layer.

Because a needle is used to introduce the cannula of the infusion device into the subcutaneous layer of skin, there is a risk associated with inadvertent exposure to the needle. Further, patients may react adversely to viewing the needle prior to insertion and may, for example, be reluctant to place the needle into the skin. Prior devices may not adequately shroud this needle prior to and/or after introduction of the infusion device.

Other issues of concern in the design and use of insertion devices include ease of use by the patient and sterilization. For example, some patients may have difficulty loading the infusion device into the insertion device.

It is therefore desirable to provide new designs for infusion devices and devices used to assist in the introduction of an infusion device into the skin of a patient to deliver a substance into the skin.

Embodiments made in accordance with the present invention are related to infusion devices for delivery of a substance to a patient. Embodiments made in accordance with the present invention also include devices that can be used to assist in the introduction of the cannula of an infusion device into the skin of a patient for delivery of a substance to the patient.

In one embodiment, an infusion device can include a site and a set. The site can include a cannula that is introduced into a subcutaneous layer of skin of the patient. The set can be coupled to the site by, for example, placing the set over the site and moving the set from an unlocked to a locked position. A substance can then be delivered through the set to the site and from the site into the patient through the cannula.

The set can preferably be oriented at multiple rotational orientations with respect to the site, and can preferably be coupled and uncoupled with the site multiple times.

In another embodiment, a device includes a needle used to insert the cannula of an infusion device into the skin of a patient. Once the cannula of the infusion device is inserted into the skin, the device moves the needle to a retracted state within the device.

In another embodiment, a device is configured to move a needle and associated cannula of an infusion device from a delivery state to a trigger state at which the cannula of the infusion device is inserted into the skin of a patient. Upon full insertion of the cannula at the trigger state, the device is then configured to move the needle to a retracted state within the device.

In another embodiment, a device includes a needle that can be used to insert a cannula of a site into the skin of a patient. Upon insertion of the cannula, the needle can be removed from the skin. In one embodiment, a cap is provided that can be placed onto the device prior to and after use of the device to provide a sterile environment and/or to reduce exposure to the needle.

In other embodiments, a subcutaneous infusion device and device for introduction of a cannula of the infusion device can be combined to introduce the cannula into the skin and deliver a substance into the skin.

The above summary of the present invention is not intended to describe each disclosed embodiment or every implementation of the present invention. Figures in the detailed description that follow more particularly exemplify embodiments of the invention. While certain embodiments will be illustrated and described, the invention is not limited to use in such embodiments.

DESCRIPTION OF THE DRAWINGS

FIG. 1 is a top perspective view of an example embodiment of a site made in accordance with the present invention.

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Pump set and pump with electromagnetic radiation operated interlock
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Needleless catheters and methods for true lumen re-entry in treatment of chronic total occlusions and other disorders
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Surgery

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