# US 2025/0366702 A1 · Cannula and Obturator with a Transparent Tip with an Opaque Component

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- Number: US 2025/0366702 A1
- Document ID: US20250366702A1
- Status: Published application
- Kind: A1
- Application number: 19/298,714
- Filed: 2025-08-13
- Published: 2025-12-04
- Earliest claimed: 2016-08-17
- Assignees: Rebound Therapeutics Corporation
- Applicants: Rebound Therapeutics Corporation
- Inventors: Peter G. Davis; Ross Tsukashima; Donald Joseph Fuller
- Web page: https://patentgrep.com/patent/US20250366702A1

## CPC

- A61B 1/00147: {Holding or positioning arrangements}
- A61B 1/00: Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes (examination of body cavities or body tracts using ultrasonic, sonic or infrasonic waves A61B8/12; endoscopic instruments for taking cell samples or for biopsy A61B10/04); Illuminating arrangements therefor (for the eyes A61B3/00)
- A61B 1/00006: {of control signals}
- A61B 1/00045: {Display arrangement}
- A61B 1/00154: {using guiding arrangements for insertion}
- A61B 1/00188: {with focusing or zooming features}
- A61B 1/00195: {with eyepieces}
- A61B 1/042: {characterised by a proximal camera, e.g. a CCD camera}
- A61B 1/05: characterised by the image sensor, e.g. camera, being in the distal end portion
- A61B 1/0669: {at proximal end of an endoscope}
- A61B 1/0684: {using light emitting diodes [LED]}
- A61B 1/07: using light-conductive means, e.g. optical fibres
- A61B 1/313: for introducing through surgical openings, e.g. laparoscopes
- A61B 17/02: for holding wounds open, e.g. retractors; Tractors
- A61B 17/0218: {for minimally invasive surgery (A61B17/0281, A61B17/0469, A61B17/12013, A61B17/1285, A61B17/29, A61B17/320016 take precedence)}
- A61B 17/34: Trocars; Puncturing needles
- A61B 17/3421: {Cannulas}
- A61B 17/3423: {Access ports, e.g. toroid shape introducers for instruments or hands (access sites for liquids A61M39/0247)}
- A61B 34/20: Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
- A61B 90/00: Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00, e.g. for luxation treatment or for protecting wound edges
- A61B 90/30: Devices for illuminating a surgical field, the devices having an interrelation with other surgical devices or with a surgical procedure
- A61B 90/361: {Image-producing devices, e.g. surgical cameras}
- A61B 90/37: {Surgical systems with images on a monitor during operation}
- A61B 1/0676: {at distal tip of an endoscope}
- A61B 17/3417: {Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating (syringe needles A61M5/32; dilators A61M29/00)}
- A61B 90/10: for stereotaxic surgery, e.g. frame-based stereotaxis
- A61B 2017/00026: {Conductivity or impedance, e.g. of tissue}
- A61B 2017/00907: {for light}
- A61B 2017/00991: {Telescopic means}
- A61B 2017/3425: {for internal organs, e.g. heart ports}
- A61B 2017/3433: {with different outer diameters of the cannula}
- A61B 2017/3454: {Details of tips}
- A61B 2018/00446: {Brain}
- A61B 2034/107: {Visualisation of planned trajectories or target regions}
- A61B 2034/2055: {Optical tracking systems}
- A61B 2090/064: {for measuring force, pressure or mechanical tension}
- A61B 2090/103: {Cranial plugs for access to brain}
- A61B 2090/306: {using optical fibres}
- A61B 2090/309: {using white LEDs}
- A61B 2090/3614: {using optical fibre}
- A61B 2090/3937: {Visible markers}
- A61B 2090/3966: {Radiopaque markers visible in an X-ray image}
- A61B 2090/3983: {Reference marker arrangements for use with image guided surgery}
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)

## Abstract

A cannula system and method for accessing a blood mass in the brain. The system comprises a cannula with a camera mounted on the proximal end of the cannula with a view into the cannula lumen and the surgical field below the lumen. A prism, reflector or other suitable optical element is oriented between the camera and the lumen of the cannula to afford the camera a view into the cannula while minimizing obstruction of the lumen. The system may also include an obturator with a small diameter shaft and a large diameter tip which is optically transmissive, so that a surgeon inserting or manipulating the assembly can easily see that the obturator tip is near brain tissue (which is white) or blood (which is red).

## Claims

### Claim 1

A cannula system for accessing a surgical field, said cannula system comprising:
a cannula comprising a cannula tube with a proximal end and a distal end and a lumen extending from the proximal end to the distal end; and
a camera assembly secured to the proximal end of the cannula, with a portion of the camera assembly overhanging the lumen; wherein
the camera assembly comprises an imaging sensor and a lens and a reflector, and the reflector is the portion of the camera overhanging the lumen.

### Claim 2 (depends on 1)

The cannula system of claim 1, wherein the reflector is spaced proximally from the proximal end of the cannula tube.

### Claim 3 (depends on 1)

The cannula system of claim 1, wherein the reflector is the distal-most optical surface of the camera assembly.

### Claim 4 (depends on 1)

The cannula system of claim 1, wherein the portion of the camera overhanging the lumen is spaced proximally from the proximal end of the cannula, and overhangs the lumen of the cannula by no more than 25%, to accommodate passage of an obturator tip having a diameter closely matching a diameter of the cannula lumen into the cannula lumen while the camera assembly is secured to the proximal end of the cannula.

### Claim 5 (depends on 1)

The cannula system of claim 1 wherein the reflector is characterized by a secondary viewing axis which extends through the lumen, the imaging sensor is characterized by an imaging sensor viewing axis, and wherein the imaging sensor viewing axis is angled relative to the secondary viewing axis.

### Claim 6 (depends on 1)

The cannula system of claim 1, wherein the reflector bends light to an angle within the range of from about 85° to about 95° from the secondary viewing axis.

### Claim 7 (depends on 1)

The cannula system of claim 1, wherein the secondary viewing axis intersects a central long axis of the cannula at a point spaced apart from the proximal end of the cannula by a distance within the range of about 80% to 120% of the length of the cannula tube.

### Claim 8 (depends on 1)

The cannula system of claim 1, wherein the secondary viewing axis intersects a central long axis of the cannula at a point spaced apart from the proximal end of the cannula by a distance within the range of about 95% to 105% of the length of the cannula tube.

### Claim 9 (depends on 1)

The cannula system of claim 1, wherein the reflector is rigidly mounted with respect to the cannula tube.

### Claim 10 (depends on 1)

The cannula system of any one of claim 1 wherein the reflector comprises a mirror.