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Trocascope XC2000 ver. 2.0. Brought to you by: Smooth Operation Chris Kitt, Brenda Marcum, Jacob Oliver, Michael Roth, and Andrew Yuan. Laparoscopy Background. Minimally invasive abdominal surgery Multiple ports for tools – separate one for laparoscope. Current Laparoscopic Process.

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Trocascope xc2000 ver 2 0 l.jpg

Trocascope XC2000 ver. 2.0

Brought to you by:

Smooth Operation

Chris Kitt, Brenda Marcum, Jacob Oliver,

Michael Roth, and Andrew Yuan

Laparoscopy background l.jpg
Laparoscopy Background

  • Minimally invasive abdominal surgery

  • Multiple ports for tools – separate one for laparoscope

Current Laparoscopic Process

Trocascope xc2000 ver 2 03 l.jpg
Trocascope XC2000 ver. 2.0

  • Eliminate one port by incorporating the camera onto the tool port

  • More convenient for surgical team - fewer hands required and viewable screen

  • Less traumatic for patient

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Project Goals and Objectives

  • Combine current laparoscope with current surgical instrument to eliminate one port

  • Minimize camera module size, while maintaining speed and resolution

  • High resolution image displayed on LCD panel

  • Minimal wires – hopefully completely wireless and battery powered

  • Incorporate data storage device for later viewing

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Low Objectives

  • 10 mm max diameter for camera module

  • 640x480 resolution

  • 30 fps

  • LCD screen

  • LED lighting with imager

  • All wired connections

  • AC power

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Mid Level Objectives

  • Battery powered – supplement with AC (2-2.5 hr run time)

  • 6 mm max diameter of camera module

  • Higher resolution

  • Wireless

  • Stream video data to external monitor

  • Screen shot capability

  • SD onboard storage

  • Enable touch screen features

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High Level Objectives

  • Multi-camera interface – split screen

  • Motorized camera module

  • Time display

  • Audio features

  • Wireless transmission to external monitor

  • Foot pedal

  • 4 mm maximum diameter of camera module

  • Wireless storage to external device

Block diagram l.jpg

Microcontroller w/ISI and LCD controller



VGA LCD Display


SD Card

Block Diagram

Rechargeable Battery

Battery Charger Controller

Top View

Microcontroller l.jpg



32bit AVR

Camera l.jpg

Microcontroller w/ISI and LCD controller




  • Connected via SCCB (I2C) and 8 parallel data lines

  • Camera takes 640x480 @ 30fps and sends it to the Image sensor interface on the microcontroller.

  • Microcontroller controls imager via SCCB connection.

Led s l.jpg

Microcontroller w/ISI and LCD controller



  • Connected via GPIO, possibly buffered with MOSFET or BJT to supply additional power

  • Each LED is connected through a buffer to a general I/O pin on the Microcontroller.

    • Allows touch screen to control LED through microcontroller, ideal for saving power and adjustable brightness.

  • LED will be selected for maximum efficiency and brightness. Don’t want to burn patient and want lots of illumination.

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Microcontroller w/ISI and LCD controller

VGA LCD Display


  • Connected via Microcontroller LCD interface.

  • Microcontroller takes data from imager and displays it on the LCD in VGA format.

  • Microcontroller takes button presses from LCD and performs desired operations, ie toggling LEDs, screenshots, etc

  • Utilizes RGB parallel input with 18 bits of color

  • VGA standards (480x640 @ 30 fps)

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Microcontroller w/ISI and LCD controller

SD Card

External Storage

  • SD Card viable option for video storage and retrieval

  • Uses standard SPI interface to communicate

  • Uses FAT32 storage system

  • SD interface built into processor

  • Easy to find documentation on SD interface

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  • Microprocessor Options

    • BGA vs. Quad Flatpack

    • Smaller/less features vs. timing issues

    • Other alternatives available

  • Long BGA layout turn-around time

  • Unfamiliar Technology

    • PCB layout

    • Eval. Board coding vs. prelim. Demo board coding

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Alternative #1

Top View

LCD controller (Epson S1D13513)



Microcontroller w/ISI (OV530-B49)

VGA LCD Display


SD Card

Alternative 2 l.jpg
Alternative #2

Top View

Image Sensor Controller (Atmel 32-bit Image Sensor interface)


W/LCD controller

(NXP LPC2158 ARM7)

VGA LCD Display



SD Card


Alternative 3 l.jpg
Alternative #3

Top View

Image Sensor Controller (Atmel 32-bit Image Sensor interface)

LCD controller (Epson S1D13513)




VGA LCD Display

SD Card


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Risks/Concerns Cont’d

  • Schedule Uncertainty

    • Enough time to learn how to store data, battery operable, etc.

    • Prototype completed by the beginning of March?

  • Component Risks

    • Expensive Eval. Board

    • Sensor frame rate and resolution vs. size

  • Questionable Feasibility

    • Low level objectives seem obtainable

    • Can we make our mid/high level objectives?

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  • Over 2 million laparoscopic surgeries performed each year

  • New laparoscopic surgeries are being introduced as technology improves

  • 6 million Trocar used each year

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Laparoscopic Surgery

  • Patient’s Point of View

    • Cheaper

      • $1,000 less than open surgery

    • Quicker Recovery

      • Hospital stay is 1/4th the time of open surgery

    • Post operative pain is less

    • Reduced infection rate

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Laparoscopic Surgery

  • Surgeon’s Point of View

    • Longer operative times

    • Expensive equipment

    • Requires extra surgical training

    • More complicated surgery

      • 1 in 2000 patients suffer vascular injuries

      • 17% of vascular injuries are fatal

      • Average surgical malpractice lawsuit = $222,285

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Our Goal

  • Make laparoscopic surgery more appealing to surgeon

    • Efficient

      • Faster Operative Times

    • Easier

      • Fewer mistakes

      • Less Surgical training

    • Safer

      • Less Crowded Operating Room

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Environmental Impact

  • Biomedical Waste

    • 6 Million Trocar used and disposed each year

    • Removing 1 Trocar per surgery reduces number by 1-2 million

  • Potential for Reusability is important

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  • Part Availability

    • All parts can be obtained from variety of different vendors

  • Maintenance

    • Trocar are eventually disposed

    • Data storage device

  • Support

    • Training

    • Setting up data storage

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  • Component tolerances may have effect on image quality

  • Testing

    • Development Board

    • Processor on a simple PCB

  • Regulations

    • FDA

    • FCC

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  • Laparoscopic Surgery

    • Dangerous Instruments

    • Complex Procedure

    • Crowded workspace

    • Exposure to patient blood

  • Our Goal

    • Reduce Complexity

    • Less Crowded

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Impact on Society

  • Safer, more efficient surgeries

  • Reduce number of assistants required for surgery

  • Potential for cheaper surgery

  • 3rd world surgery potential