Instrument and method for delivery of anaesthetic drug
First Claim
1. A method for delivery of an anaesthetic drug into a fascia sheath of a nerve, comprising the steps of:
- a. providing a needle assembly comprising a needle capable of conveying a first electrical impulse from a proximal end to a distal tip of the needle and an electrically insulating coating over a portion of an outer surface of the needle between the proximal end and the distal tip;
b. inserting the distal tip of the needle to a position proximate the nerve;
c. applying the first electrical impulse to the proximal end of the needle which first impulse is conveyed to the distal tip of the needle to confirm the appropriate placement of the distal tip;
d. piercing the fascia sheath of the nerve with the distal tip of the needle;
e. providing a wire located within a catheter, the wire capable of conveying a second electrical impulse from the proximal end of the catheter to the distal end of the catheter, a distal end of the wire terminating at an electrically conducting tip that extends beyond the distal end of the catheter, a proximal end of the wire accessible for application of the second electrical impulse;
f. inserting the distal end of the catheter into the proximal end of the needle assembly and advancing the catheter until electrically conducting tip extends distally of the distal tip of the needle, into a space adjacent the nerve and providing a catheter adapter on the proximal end of the catheter, the catheter adapter comprising an electrical contact which allows a source of electrical impulse to be attached through the catheter adapter to the proximal end of the catheter;
g. applying the second electrical impulse through the electrical contact of the catheter adapter to the proximal end of the wire which second impulse is conveyed to the electrically conducting tip and manipulating the location of the electrically conducting tip proximate the nerve to achieve the desired placement of the electrically conducting tip; and
h. administering an anaesthetic through the catheter to the nerve.
4 Assignments
0 Petitions
Accused Products
Abstract
A needle and catheter system, including components, is provided such that the position of an epidural needle may be identified after insertion into the body of a patient by electrically stimulating and thus locating a specific nerve.When a specific nerve is located, the catheter is inserted through the needle to a point slightly beyond the distal tip of the needle. The catheter tip may then be manipulated and the optimum position for the catheter tip determined by applying an electrical voltage through the helical wire to the proximal tip of the helical wire, this electrical stimulation being utilized in locating the specific location of the catheter tip within the nerve. Once optimum placement is achieved, the catheter is utilized for continuous administration of anaesthetic. A catheter adapter is utilized to allow easy access to the catheter and introduction of fluid into the nerve of the patient through the catheter tip. The catheter and catheter adapter are also provided with components so that the catheter adapter can be in place for during electrical stimulation of the target nerve.
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Citations
31 Claims
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1. A method for delivery of an anaesthetic drug into a fascia sheath of a nerve, comprising the steps of:
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a. providing a needle assembly comprising a needle capable of conveying a first electrical impulse from a proximal end to a distal tip of the needle and an electrically insulating coating over a portion of an outer surface of the needle between the proximal end and the distal tip;
b. inserting the distal tip of the needle to a position proximate the nerve;
c. applying the first electrical impulse to the proximal end of the needle which first impulse is conveyed to the distal tip of the needle to confirm the appropriate placement of the distal tip;
d. piercing the fascia sheath of the nerve with the distal tip of the needle;
e. providing a wire located within a catheter, the wire capable of conveying a second electrical impulse from the proximal end of the catheter to the distal end of the catheter, a distal end of the wire terminating at an electrically conducting tip that extends beyond the distal end of the catheter, a proximal end of the wire accessible for application of the second electrical impulse;
f. inserting the distal end of the catheter into the proximal end of the needle assembly and advancing the catheter until electrically conducting tip extends distally of the distal tip of the needle, into a space adjacent the nerve and providing a catheter adapter on the proximal end of the catheter, the catheter adapter comprising an electrical contact which allows a source of electrical impulse to be attached through the catheter adapter to the proximal end of the catheter;
g. applying the second electrical impulse through the electrical contact of the catheter adapter to the proximal end of the wire which second impulse is conveyed to the electrically conducting tip and manipulating the location of the electrically conducting tip proximate the nerve to achieve the desired placement of the electrically conducting tip; and
h. administering an anaesthetic through the catheter to the nerve. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for delivery of an anaesthetic drug to a nerve of a patient, comprising the steps of:
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a. providing a needle assembly comprising a needle capable of conveying a first electrical impulse from a proximal end of the needle to a distal tip of the needle and an electrically insulating coating over a portion of an outer surface of the needle between the proximal end and the distal tip;
b. inserting the distal tip of the needle through a first portion of skin of the patient to a position proximate the nerve;
c. applying the first electrical impulse to the proximal end of the needle which first impulse is conveyed to the distal tip of the needle to confirm the appropriate placement of the distal tip;
d. providing a catheter, the catheter capable of conveying a second electrical impulse from a proximal end of the catheter to a distal tip of the catheter and providing a catheter adapter on a proximal end of the catheter, the catheter adapter comprising an electrical contact which allows a source of electrical impulse to be attached through the catheter adapter to the proximal end of the catheter;
e. inserting the distal tip of the catheter into the proximal end of the needle and advancing the catheter until the distal tip of the catheter extends distally of the distal tip of the needle;
f. applying the second electrical impulse through the electrical contact of the catheter adapter to the proximal end of the catheter which second impulse is conveyed to the distal tip of the catheter and manipulating the location of the distal tip of the catheter proximate the nerve to achieve the desired placement of the distal tip of the catheter; and
g. administration of an anaesthetic through the catheter to the nerve. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for delivery of an anaesthetic drug to a nerve of a patient, comprising the steps of:
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a. providing a needle assembly comprising a needle capable of conveying a first electrical impulse from a proximal end of the needle to a distal tip of the needle and an electrically insulating coating over a portion of an outer surface of the needle between the proximal end and the distal tip;
b. inserting the distal tip of the needle into the patient to a position proximate the nerve;
c. applying the first electrical impulse to the proximal end of the needle which first impulse is conveyed to the distal tip of the needle to confirm the appropriate placement of the distal tip;
d. providing a catheter, the catheter capable of conveying a second electrical impulse from a proximal end of the catheter to a distal tip of the catheter;
e. inserting the distal tip of the catheter into the proximal end of the needle;
manipulating the catheter until the distal tip of the catheter comes into contact with an electrically conducting interior bore of the needle;
g. conveying the second electrical pulse from the distal tip of the catheter to the electrically conducting interior bore of the needle which second pulse is conveyed to the distal tip of the needle; and
h. administration of an anaesthetic through the catheter to the nerve. - View Dependent Claims (20, 21, 22, 23, 24)
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25. A method for delivery of an anaesthetic drug to a nerve of a patient, comprising the steps of:
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a. providing a needle assembly comprising a needle and an electrically insulating coating over a portion of an outer surface of the needle between a proximal end and a distal tip of the needle;
b. inserting the distal tip of the needle into the patient to a position proximate the nerve;
c. providing a catheter, the catheter capable of conveying an electrical impulse from a proximal end of the catheter to a distal tip of the catheter;
d. connecting a catheter adapter to the proximal end of the catheter, the catheter adapter comprising an electrical contact which allows a source of electrical impulse to be attached through the catheter adapter to the proximal end of the catheter, the catheter adapter also providing access to the lumen of the catheter;
e. inserting the distal tip of the catheter into the proximal end of the needle;
f. applying the electrical impulse through the electrical contact of the catheter adapter to the proximal end of the catheter which impulse is conveyed to the distal tip of the catheter; and
g. administration of an anaesthetic through the catheter adapter and the catheter, to the nerve. - View Dependent Claims (26, 27, 28, 29, 30, 31)
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Specification