Systems and method for single-operator neuraxial medical device procedures using real-time ultrasound guidance
View Patent ↗Aspects of the present disclosure describe medical device placement, including devices, systems and methods for placing catheters, such as epidural catheters, or other medical devices, such as needles, using a guide on a sterile ultrasound sheath.
1 . A medical device placement, comprising:
a medical device mount provided with a surface configured to position over and adhere to a human's back over a portion of the human's spinal structure, wherein the medical device mount includes a component that is translatable along the two dimensional surface of the human's back relative to the human spinal structure while the medical device mount is adhered to the portion of the human's back; and
a sterile ultrasound probe sheath configured with an orientation at a predetermined angle relative to the human spinal structure, wherein the sheath is integral to or is configured to connect to the translatable component of the medical device;
wherein the sheath includes at least one needle guide and is configured to at least partially rotate around an axis that is either perpendicular to the plane of the human back or offset by a specific angle from the perpendicular relative to the translatable component of the medical device mount to provide different ultrasound probe views and different approach vectors for the at least one needle guide dependent upon the rotational position of the sheath.
2 . A device in accordance with claim 1 , wherein the sheath includes three needle guides, each angled back to a path of an ultrasound probe beam directed by the sheath such that trajectories of each of the three needle guides intersect the beam at varying depths.
3 . A device in accordance with claim 2 , wherein the depths vary between 4 and 15 centimeters.
4 . A device in accordance with claim 3 , wherein the depths vary between 4 and 6 centimeters.
5 . A device in accordance with claim 3 , wherein the depths vary between 7 and 9 centimeters.
6 . A device in accordance with claim 3 , wherein the depths vary between 10 and 12 centimeters.
7 . A device in accordance with claim 3 , wherein the depths vary between 13 and 15 centimeters.
8 . A device in accordance with claim 1 , wherein the predetermined angle takes into account at least one patient parameter for that patient in order to achieve placement, including angle and depth of placement in target tissue.
9 . A device in accordance with claim 8 , wherein the at least one parameter is one or more of patient sex, age, height and weight.
10 . A device in accordance with claim 1 , wherein the predetermined angle is between 0 and 30 degrees.
11 . A device in accordance with claim 10 , wherein the predetermined angle is between 10 and 20 degrees.
12 . A device in accordance with claim 1 , wherein the translatable component comprises at least one inner frame that is translatable in an x-y axis direction relative to the spinal structure.
13 . A device in accordance with claim 2 , wherein the translatable component comprises at least one inner frame that is translatable in an x-y axis direction relative to the spinal structure and wherein the sheath with integral needle guides is rotatable around a z-axis.
14 . A device in accordance with claim 13 , wherein the z-axis rotatable portion includes guide markings for adjustment relative to a measured target depth D.
15 . A device in accordance with claim 13 , wherein translatable knobs adjust at least one inner frame in x-y axis directions.
16 . A device in accordance with claim 13 , wherein z-axis rotation of the sheath is facilitated by magnets or latches positioned at predetermined positions relative to a plurality of possible guide positions for the same device.
17 . A method for lumbar epidural catheter placement, comprising:
positioning and affixing a medical device mount against a human patient's back over a spinal structure (z axis), with an ultrasound probe and at least one needle guide in an axial configuration relative to the spinal structure, wherein the medical device mount includes a component that is translatable along the two dimensional surface of the human back relative to the human spinal structure and is configured to rotate the ultrasound and at least one needle guide relative thereto while the medical device mount is adhered to the portion of the human back;
moving the translatable component in a y-direction such that a projected ultrasound beam for an ultrasound device mounted in a sheath thereon passes through an interspace optimizing the view of the ligamentum flavum and dura as two (possibly coincident) horizontal lines;
moving the translatable component in the x direction such that the middle of the ligamentum flavum—posterior dura complex is coincident with the midline of the ultrasound view;
measuring depth D of the posterior dura from the patient's skin;
rotating the sheath to the parasagittal oblique ultrasound view;
adjusting a component of the device in the x-y plane so that a trajectory of the guide intersects the patient's median plane at depth D and so that the midline of the ultrasound display passes between adjacent lamina; and
advancing a needle and/or catheter to epidural space.
18 . A method in accordance with claim 17 , wherein said adjustment comprises adjusting a first component of the device in in an x-direction so that the trajectory of the guide intersects the patient's median plane at depth D and adjusting a second component of the device in the y-direction such that the midline of the ultrasound display passes between adjacent lamina.
19 . A method in accordance with claim 17 , wherein the medical device mount is provided with:
a surface configured to position over a portion of a human spinal structure, wherein the medical device mount is translatable along the two dimensional surface of a human back relative to the human spinal structure via the translatable component; and
a sterile ultrasound probe sheath configured with an orientation at a predetermined angle relative to the human spinal structure, wherein the sheath is integral to or is configured to connect to the medical device mount translatable component;
wherein the sheath includes at least one needle guide and is configured to at least partially rotate around an axis on the medical device mount translatable component to provide different approach vectors for the at least one needle guide dependent upon the rotational position of the sheath.
20 . A method in accordance with claim 19 , wherein the sheath includes three needle guides, each angled back to a path of an ultrasound probe beam directed by the sheath such that guide trajectories of each intersect the beam at varying depths.
21 . A method in accordance with claim 19 , wherein the predetermined angle is 15 degrees.
22 . A method in accordance with claim 19 , wherein at least one inner frame is translatable in an x-y axis direction relative to the spinal structure and wherein the sheath and needle guides are rotatable around a z-axis.
23 . A method in accordance with claim 17 , where one or measurements are made utilizing software.
24 . A method in accordance with claim 22 , wherein the depth D of the posterior dura is measured via software.
25 . A method in accordance with claim 23 , wherein one or more measurements are made utilizing artificial intelligence.
26 . A method in accordance with claim 25 , wherein the depth D of the posterior dura is measured via artificial intelligence.