Subcutaneous device with leak prevention

A medical device comprising:

• a base having a needle channel and a first surface configured to be secured to a patient's skin;
• an insertable member configured to be secured to the base with a length portion of the insertable member extending out of the needle channel at the first surface, for insertion through the patient's skin at an insertion site;
• a septum extending across the needle channel, the septum having a body through which an insertion needle may be selectively extended to facilitate the subcutaneous insertion of the length portion of the insertable member, the septum providing a liquid seal across the needle channel;
• wherein the needle channel and the septum provide a sealed volume in which a limited amount of blood or other fluid from the insertion site may be held;
• an adhesive material layer attached to the first surface of the base, for securing the first surface of the base to the patient's skin, the adhesive material layer having an opening in alignment with the needle channel in the base;
• an annular substrate located within the opening in the adhesive material layer and having an opening in alignment with the needle channel in the base and through which the insertable member extends when the insertable member is inserted through the patient's skin;
• and
• a layer of gauze or other blood absorbing material attached to a skin-facing surface of the annular substrate.

A medical device comprising:

• a base having a needle channel and a first surface configured to be secured to a patient's skin;
• an adhesive material layer attached to the first surface of the base, for securing the first surface of the base to the patient's skin, the adhesive material layer having an opening in alignment with the needle channel in the base;
• an insertable member configured to be secured to the base with a length portion of the insertable member extending out of the needle channel at the first surface and through the opening in the adhesive material layer, for insertion through the patient's skin at an insertion site;
• an annular substrate located within the opening in the adhesive material layer and having an opening in alignment with the needle channel in the base and through which the insertable member extends when the insertable member is inserted through the patient's skin;
• and
• an annular adhesive material layer provided on one side of the annular substrate for adhering the annular substrate to the first surface of the base;
• wherein the annular substrate is impregnated or coated with a first material, has a layer of the first material, or is attached to a layer of gauze or other absorbent material, that at least partially surrounds or covers the insertion site, and wherein the first material comprises at least one of a hydrophilic material, a blood clotting material, or a pain reducing material.

A method of making a medical device, the method comprising:

• providing a base having a needle channel and a first surface configured to be secured to a patient's skin;
• securing an insertable member to the base with a length portion of the insertable member extending out of the needle channel at the first surface, for insertion through the patient's skin at an insertion site;
• extending a septum across the needle channel, the septum having a body through which an insertion needle may be selectively extended to facilitate the subcutaneous insertion of the length portion of the insertable member, the septum providing a liquid seal across the needle channel;
• attaching an adhesive material layer to the first surface of the base, for securing the first surface of the base to the patient's skin, the adhesive material layer having an opening in alignment with the needle channel in the base;
• attaching an annular substrate within the opening in the adhesive material layer, the annular substrate having an opening in alignment with the needle channel in the base and through which the insertable member extends when the insertable member is inserted through the patient's skin;
• and
• providing an annular adhesive material layer on one side of the annular substrate for adhering the annular substrate to the first surface of the base;
• wherein the needle channel and the septum provide a sealed volume in which a limited amount of blood or other fluid from the insertion site may be held.