Patent Application
20200297330
The present disclosure relates generally to medical devices, systems, and methods. More particularly, the present disclosure relates to tissue biopsy devices and systems used in hysteroscopic surgical procedures, and methods of hysteroscopic tissue biopsy.
Tissue biopsy is a medical procedure used to obtain a tissue sample from an area of the body. The obtained tissue sample is usually tested to assist in diagnosing a medical condition or to assess the effectiveness of a particular treatment. Endometrial biopsies are procedures employed for evaluating uterine tissue for the presence of cancerous or pre-cancerous cells. Endometrial biopsies typically include the insertion of a catheter through the cervix and into the uterus of the patient. Following insertion of the catheter, a biopsy needle is inserted into the uterus via the catheter, whereupon a small amount of endometrial lining is aspirated with the biopsy needle.
In an aspect of the present disclosure, a tissue biopsy system is provided and includes an elongate guide member and a biopsy needle. The elongate guide member includes a proximal end portion, and a distal end portion. The distal end portion has a distal tip extending distally therefrom. The distal tip has a helical configuration and is configured to pierce tissue during a rotation of the elongate guide member about a longitudinal axis defined by the elongate guide member. The biopsy needle has a distal tip configured to pierce and capture a sample of tissue. The distal tip of the elongate guide member is configured to guide the distal tip of the biopsy needle toward the sample of the tissue.
In aspects, the distal tip of the elongate guide member may define a channel.
In aspects, the distal tip of the biopsy needle may be configured to pass through the channel defined by the distal tip of the elongate guide member to pierce and capture the sample of the tissue.
In aspects, the channel of the distal tip of the elongate guide member may have a diameter that is greater than a diameter of the distal tip of the biopsy needle.
In aspects, the elongate guide member may have a hollow shaft, and the distal tip of the elongate guide member may extend distally from the hollow shaft.
In aspects, the biopsy needle may have an elongate body portion configured to pass through the hollow shaft. The distal tip of the biopsy needle may extend distally from the elongate body portion.
In aspects, the biopsy needle may define a longitudinally-extending passageway. The distal tip of the elongate guide member may be configured for receipt in the passageway.
In aspects, the biopsy needle may be configured to slide distally relative to and over the distal tip of the elongate guide member while the distal tip of the elongate guide member is disposed in the passageway.
In accordance with another aspect of the disclosure, an elongate guide member is provided and includes a shaft, a handle portion, and a distal tip. The shaft has a proximal end portion and a distal end portion and defines a longitudinal axis. The handle portion is coupled to the proximal end portion of the shaft and the distal tip extends distally from the distal end portion of the shaft. The distal tip has a helical configuration and is configured to pierce tissue during a rotation of the shaft about the longitudinal axis.
In aspects, the distal tip may define a longitudinally-extending channel.
In aspects, the shaft may define a longitudinally-extending channel coextensive with the channel of the distal tip.
In aspects, the distal tip may have a further-most end that is tapered for piercing tissue.
In accordance with yet another aspect of the disclosure, a method of performing a needle biopsy of uterine tissue is provided. A distal tip of an elongate guide member is positioned relative to uterine tissue; the elongate guide member is rotated, thereby fixing the distal tip of the elongate guide member in the uterine tissue; and a distal tip of a biopsy needle is guided along the elongate guide member and into the uterine tissue to take a sample of the uterine tissue. The distal tip of the elongate guide member has a helical configuration.
In aspects, guiding the distal tip of the biopsy needle may include moving the distal tip of the biopsy needle through a channel defined by the distal tip of the elongate guide member.
In aspects, guiding the distal tip of the biopsy needle may include distally sliding the distal tip of the biopsy needle over the distal tip of the elongate guide member.
In aspects, the biopsy needle may define a longitudinally-extending passageway. The distal tip of the elongate guide member may be disposed in the passageway while the distal tip of the biopsy needle distally slides over the distal tip of the elongate guide member.
As used herein, the term distal refers to that portion of the device which is farthest from the user, while the term proximal refers to that portion of the device which is closest to the user. Further, to the extent consistent, any of the aspects detailed herein may be utilized with any or all of the other aspects detailed herein.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and, together with a general description of the disclosure given above, and the detailed description of the embodiment(s) given below, serve to explain the principles of the disclosure, wherein:
Embodiments of the present disclosure will now be described in detail with reference to the drawings, in which like reference numerals designate identical or corresponding elements in each of the several views. In the following description, well-known functions or constructions are not described in detail to avoid obscuring the present disclosure in unnecessary detail.
The devices, systems, and methods of the present disclosure may be used for retrieving tissue during any minimally invasive procedure. That is, although the systems and methods of the present disclosure are described below with reference to a hysteroscopic biopsy procedure, the systems and methods of the present disclosure may also be used for other minimally invasive tissue-retrieving procedures.
With reference to
The biopsy needle 12 has an elongate body portion 14, a handle portion 16 coupled to a proximal end portion 14a of the elongate body portion 14, and a distal tip 18 coupled to a distal end portion 14b of the elongate body portion 14. The elongate body portion 14 may be a catheter, a cannula, a tube, or the like, and defines a longitudinally-extending passageway 20. The elongate body portion 14 may be fabricated from any suitable material including a metal or plastic, such as, for example, silicone rubber, polyurethane, PET, thermoplastic polymers, and/or nylon. The handle portion 16 is configured to be grasped by a clinician to manipulate the biopsy needle 12 to a selected position within a surgical site. In some aspects, the handle portion 14 of the biopsy needle 12 may be configured to be attached to a robotic arm assembly (not shown) for controlling movement of the biopsy needle 12.
The distal tip 18 of the biopsy needle 12 extends distally from the distal end portion 14b of the elongate body portion 14. In aspects, the distal tip 18 may be monolithically formed with the distal end portion 14b of the elongate body portion 14 or be connected thereto in any other suitable manner, e.g., via mechanical engagement, welding, adhesion, etc. The distal tip 18 is configured to pierce tissue and capture a sample of the tissue therein. The distal tip 18 may be fabricated from metal (e.g., stainless steel) and defines a hollow interior 22 configured for receipt of tissue. A distal-most end 24 of the distal tip 18 may have a lancet point configuration. It is contemplated that the distal-most end 24 of the distal tip 18 may be any suitable needle tip type of any suitable geometry and any suitable gauge (e.g., 18 gauge) to facilitate piercing tissue.
With reference to
The handle portion 34 of the elongate guide member 30 is coupled to the proximal end portion 32a of the shaft 32 and is configured to be grasped by a clinician to manipulate the elongate guide member 30 to the target tissue site. In some aspects, the handle portion 34 of the elongate guide member 30 may be configured to be attached to the robotic arm assembly for controlling movement of the elongate guide member 30.
The distal tip 36 of the elongate guide member 30 extends distally from the distal end portion 32b of the shaft 32. In aspects, the distal tip 36 of the elongate guide member 30 may be monolithically formed with or otherwise connected to the distal end portion 32b of the shaft 32, e.g., via welding, mechanical engagement, etc. The distal tip 36 of the elongate guide member 30 is an open coil helical wire, such that adjacent coils 36a, 36b of the distal tip 36 have a space 40 defined therebetween to allow for tissue to be disposed therebetween. The distal tip 36 may be configured to resist compression or may be configured to compress under a threshold force to narrow the distance between the adjacent coils 36a, 36b. It is contemplated that the distal tip 36 may have any suitable length including any suitable number of coils and pitch of coils to make up the helical configuration thereof. A further-most distal end 42 of the distal tip 36 may be sharp, pointed, or otherwise tapered, such that the distal tip 36 is configured to pierce tissue during a rotation of the shaft 32 about the longitudinal axis “X.”
The distal tip 36 of the elongate guide member 30 is also configured to guide the distal tip 18 of the biopsy needle 12 towards target tissue. In particular, the distal tip 36 of the elongate guide member 30 defines a longitudinally-extending channel 44 that is coextensive with the channel 38 of the shaft 32. As such, as the distal tip 18 of the biopsy needle 12 passes distally out of the shaft 32 of the elongate guide member 30, the distal tip 18 of the biopsy needle 12 enters the channel 44 of the distal tip 36 of the elongate guide member 30. The channel 44 of the distal tip 36 of the elongate guide member 30 has a diameter that is greater than a diameter of the distal tip 18 of the biopsy needle 12 to allow for the distal tip 18 of the biopsy needle 12 to pass therethrough during use.
In aspects, the distal tip 36 of the elongate guide member 30 may be radiopaque so that it can be seen with imaging systems such as X-ray, cone beam CT, CAT, fluoroscopy, etc. The distal tip 36 of the elongate guide member 30 may have fixation elements (e.g., barbs, teeth, hooks, or the like) disposed at a suitable distance proximal from the further-most end 42 thereof. The fixation elements (not shown) may assist in fixing the distal tip 36 in tissue and/or may provide tactile feedback to the clinician indicating that the distal tip 36 has reached a sufficient depth in tissue. In aspects, the distal tip 36 of the elongate guide member 30 may be coated with or fabricated from polytetrafluoroethene (PTFE), graphite, or other lubricating agents to minimize friction with tissue. In aspects, the distal tip 36 may be fabricated from a shape memory material (polymer or alloy), e.g., nickel titanium, such that the distal tip 36 may be configured to move from a first state, in which the distal tip 36 is linear, to a second state, in which the distal tip 36 assumes its helical configuration upon receiving an electrical impulse or upon changing to a particular temperature (e.g., body temperature).
Referring again to
With the distal tip 36 of the elongate guide member 30 fixed to the tissue, the biopsy needle 12 is positioned into the channel 38 of the shaft 32 of the elongate guide member 30 (e.g., via an entry opening at a proximal end of the shaft 32 or handle portion 34) and moved distally therethrough. The distal tip 18 of the biopsy needle 12 moves through the channel 38 of the shaft 32 and thereafter into the channel 44 of the distal tip 36. The distal tip 36 of the biopsy needle 12 is driven distally through and relative to the distal tip 36 of the elongate guide member 30 to pierce the tissue to capture a sample of the tissue in the hollow interior 22 of the distal tip 18 of the biopsy needle 12. Channel 44 guides the distal tip 18 of the biopsy needle 12 through tissue and may also serve as a visual indicator for the depth of insertion the distal tip 18 of the biopsy needle 12. That is, distal 18 may piece the tissue to a selected depth corresponding or relative to the distal-most end of distal tip 36, thus allowing surgeon to control the depth.
Upon capturing the tissue sample, the biopsy needle 12 is withdrawn proximally from the elongate guide member 30 and the elongate guide member 30 is reverse-rotated to detach the distal tip 36 thereof from the tissue to enable removal of the elongate guide member 30.
The biopsy needle 112 defines a longitudinally-extending passageway 120 configured for receipt of a distal tip 136 of the elongate guide member 130. As such, instead of the elongate guide member 130 configured to guide the biopsy needle 112 through it, the biopsy needle 112 is slid distally over the distal tip 136 of the elongate guide member 130 while the distal tip 136 of the elongate guide member 130 remains disposed within the passageway 120 of the biopsy needle 112, thus guiding the biopsy needle 112 about the elongated guide member 130. During use, after capturing tissue within the distal tip 118 of the biopsy needle 112, the elongate guide member 130 is rotated to detach the distal tip 136 thereof from the tissue prior to withdrawing the biopsy needle 112. Alternatively, elongate guide member 130 and biopsy needle 112 may be withdrawn together with one another (with both rotating and translating or with both translating and just elongated guide member 130 rotating).
Persons skilled in the art will understand that the devices and methods specifically described herein and illustrated in the accompanying drawings are non-limiting exemplary embodiments. It is envisioned that the elements and features illustrated or described in connection with one exemplary embodiment may be combined with the elements and features of another without departing from the scope of the present disclosure. As well, one skilled in the art will appreciate further features and advantages of the disclosure based on the above-described embodiments. Accordingly, the disclosure is not to be limited by what has been particularly shown and described, except as indicated by the appended claims.
