Medical instrument for fluid injection and related method
First Claim
1. A medical instrument comprising an elongate member and a plurality of hollow needle elements connected to one end of said elongate member, said needle elements extending in a direction away from said one end of said elongate member, said needle elements each being convex on an outer side facing away from others of said needle elements and concave on an inner side facing said others of said needle elements so that said needle elements together define a bulbous ovoid shape, with tips of said needle elements angled inwardly at a distal tip of the medical instrument.
2 Assignments
0 Petitions
Accused Products
Abstract
A medical instrument for fluid injection includes a tubular member and a plurality of hollow needle elements connected to one end of the tubular member. Generally, the tubular member has a lumen and all the needle elements communicate with the lumen to enable a distribution of a diagnostic or therapeutic fluid to various points in a predetermined region. The tubular member is provided with a fluid introduction port at an end of the tubular member opposite the needle elements, the fluid introduction port communicating with the lumen. The needle elements are disposed in a predetermined configuration adapted to carry out a desired function. The needle elements are at least partially made of resilient material with a memory so that the needle elements are biased by their internal stresses towards a predetermined rest configuration and are alternately disposable in the rest configuration and at least one stressed or loaded configuration.
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Citations
51 Claims
- 1. A medical instrument comprising an elongate member and a plurality of hollow needle elements connected to one end of said elongate member, said needle elements extending in a direction away from said one end of said elongate member, said needle elements each being convex on an outer side facing away from others of said needle elements and concave on an inner side facing said others of said needle elements so that said needle elements together define a bulbous ovoid shape, with tips of said needle elements angled inwardly at a distal tip of the medical instrument.
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6. A surgical method comprising:
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providing a medical instrument including a needle device with multiple fluid ejection apertures;
inserting said needle device proximate to a selected tissue mass; and
injecting sufficient fluid through said apertures to elevate said tissue mass from surrounding tissues. - View Dependent Claims (7, 8, 9, 10)
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11. A medical instrument assembly comprising:
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a catheter insertable into a biopsy channel of an endoscope; and
a medical instrument made of a memory material manufactured to have a first configuration at room temperature and to assume a second configuration upon attaining a predetermined activation temperature higher than room temperature, said instrument being removably disposed inside said catheter. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A surgical method comprising:
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providing a catheter;
providing an instrument having a first configuration at room temperature;
inserting said catheter into a patient;
thereafter inserting said instrument into the patient through said catheter;
after inserting said instrument into the patient, heating said instrument to an activation temperature above room temperature;
upon the attainment of said activation temperature by said instrument, automatically deforming said instrument to a second configuration different from said first configuration, the deforming of said instrument occurring by virtue of the attainment of said activation temperature; and
using said instrument in said second configuration to perform an operation on internal body tissues of the patient. - View Dependent Claims (18, 19)
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- 20. A medical instrument comprising a needle flexible enough to traverse a biopsy channel of a flexible endoscope and stiff enough for insertion into organic tissues of a patient, said needle being at least 6 mm long.
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23. A surgical method comprising:
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providing an instrument having a first configuration at room temperature;
inserting said instrument into a patient;
after inserting said instrument into the patient, heating said instrument to an activation temperature above room temperature;
upon the attainment of said activation temperature by said instrument, automatically deforming said instrument to a second configuration different from said first configuration, the deforming of said instrument occurring by virtue of the attainment of said activation temperature; and
using said instrument in said second configuration to perform an operation on internal body tissues of the patient. - View Dependent Claims (24, 25, 26)
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- 27. A medical instrument having at least a portion made of a memory material manufactured to have a first configuration at room temperature and to assume a second configuration upon attaining a predetermined activation temperature higher than room temperature.
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33. A medical therapeutic method comprising:
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providing a hollow needle having a plurality of apertures spaced from one another longitudinally along said needle;
inserting said needle into tissues along and substantially parallel to a vascular lumen; and
thereafter injecting a fluid substantially simultaneously from apertures into said tissues. - View Dependent Claims (34, 35, 36)
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37. A subcutaneous medical treatment method comprising:
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providing a hollow needle having a plurality of apertures spaced from one another longitudinally along said needle;
inserting said needle into subcutaneous tissues along and substantially parallel to a skin surface; and
thereafter injecting a fluid substantially simultaneously from apertures into said tissues. - View Dependent Claims (38)
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39. A surgical method comprising:
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providing a medical instrument including a needle device with multiple fluid ejection apertures;
inserting said needle device into a polyp so that said apertures are distributed through at least a substantial portion of said polyp; and
injecting a marker fluid substantially simultaneously through said apertures to mark said polyp.
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40. A medical method comprising:
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providing a tubular member having, at one end, a plurality of hollow needle elements;
placing distal tips of said needle elements in contact with organic tissues of a patient about a presented tissue mass;
thereafter feeding a fluid through said tubular member and through said needle elements to inject said fluid into said organic tissues to generate a peduncle beneath said tissue mass; and
using a cauterization snare to cut through said peduncle and sever said tissue mass. - View Dependent Claims (41)
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42. A medical method comprising:
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providing a tubular member having, at one end, a plurality of hollow needle elements;
placing distal tips of said needle elements in contact with organic tissues of a patient about a bleeding site; and
thereafter feeding a blood-flow reducing agent through said tubular member and through said needle elements to inject said agent into said organic tissues to stem the bleeding at said site. - View Dependent Claims (43, 44)
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45. A medical method comprising:
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inserting an endoscope into a patient;
moving an elongate needle through a biopsy channel of said endoscope, said needle having a length of greater than one centimeter and being flexible to negotiate bends in said biopsy channel;
ejecting said needle from said biopsy channel;
subsequently inserting said needle into internal tissues of the patient proximate to a distal end of said endoscope; and
injecting fluid into said internal tissues via the inserted needle. - View Dependent Claims (46, 47)
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48. A medical method comprising
providing a medical instrument including at least one needle element made of an electrically resistant material, said needle being preformed to assume a desired use configuration upon attainment of a predetermined activation temperature above room temperature; -
inserting said needle into a patient;
thereafter heating said needle to said activation temperature so that said needle assumes said desired use configuration; and
subsequently manipulating said needle inside the patient to engage internal tissues with said needle in said desired use configuration. - View Dependent Claims (49)
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50. A medical method comprising:
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providing a medical instrument including a plurality of needle elements all made of an electrically resistant material, said needle elements being preformed to assume respective desired use configurations upon attainment of a predetermined activation temperature above room temperature;
inserting said needle elements substantially simultaneously through a tubular member into a patient;
thereafter heating said needle elements to said activation temperature so that said needle elements assume the respective desired use configurations;
moving said needle elements inside the patient to engage internal tissues with said needle elements; and
using said needle elements in said respective desired use configurations to perform a procedure on the internal tissues. - View Dependent Claims (51)
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Specification