Multi-cannula sensing device

A dual cannula device for sensing differences in an environment of a body of a patient during passage of the dual cannula device through one or more tissues in the body of the patient comprising:

• an elongate first member having a proximal end, an opposite distal end, a length extending between the proximal end and the distal end of the elongate first member, a longitudinal axis extending through the proximal end and the distal end, the elongate first member having disposed therein a first cannula having a first lumen and a second cannula having a second lumen, wherein the first and second cannulas are in a side-by-side configuration, the first cannula having a distal end that extends distally from a distal end of the second cannula, the first lumen substantially aligned with the longitudinal axis and extending through and along the length of the elongate first member between a first opening at a proximal end of the first cannula and a second opening at the distal end of the first cannula, portions of the second lumen substantially aligned with the longitudinal axis and extending through and along a portion of the length of the elongate first member between a third opening at a proximal end of the second cannula and a fourth opening adjacent the distal end of the second cannula, the elongate first member having a wall separating the first and second cannulas, wherein, in a cross-section perpendicular to the longitudinal axis, a first surface of the wall and a first interior arcuate portion of the first cannula forms a first cross-sectional area of the first lumen, and a second surface of the wall and a second interior arcuate portion of the second cannula forms a second cross-sectional area of the second lumen, the first interior arcuate portion having a shape corresponding to a majority of a circle such that the first cross-sectional area is substantially larger than the second cross sectional area;
• one or more sensors positioned in the second lumen;
• and
• a signaling component including a light source, the signaling component being connected to the one or more sensors and being configured to illuminate the light source when the one or more sensors sense that the elongate first member passes through the one or more tissues.

A dual cannula device for sensing differences in an environment of a body of a patient during passage of the dual cannula device through one or more tissues in the body of the patient comprising:

• an elongate first member having a proximal end, an opposite distal end, a length extending between the proximal end and the distal end of the elongate first member, a longitudinal axis extending through the proximal end and the distal end, the elongate first member having disposed therein a first cannula having a first lumen and a second cannula having a second lumen, wherein the first and second cannulas are in a side-by-side configuration, the first cannula having a distal end that extends distally from a distal end of the second cannula, the first lumen substantially aligned with the longitudinal axis and extending through and along the length of the elongate first member between a first opening at a proximal end of the first cannula and a second opening at the distal end of the first cannula, portions of the second lumen substantially aligned with the longitudinal axis and extending through and along a portion of the length of the elongate first member between a third opening at a proximal end of the second cannula and a fourth opening adjacent distal end of the second cannula, the elongate first member having a wall separating the first and second cannulas, wherein, in a cross-section perpendicular to the longitudinal axis, a first surface of the wall and a first interior arcuate portion of the first cannula forms a first cross-sectional area of the first lumen, and a second surface of the wall and a second interior arcuate portion of the second cannula forms a second cross-sectional area of the second lumen, the first interior arcuate portion having a shape corresponding to a majority of a circle such that the first cross-sectional area is substantially larger than the second cross sectional area;
• one or more sensors positioned in the second lumen;
• a second member connected at a distal end thereof to the proximal end of the elongate first member, the second member including a channel communicating with the first lumen;
• and
• a signaling component including a light source, the signaling component connected to the one or more sensors and being configured to illuminate the light source when the one or more sensors sense that the elongate first member passes through the one or more tissues, the light source being provided on the second member.