Surgical Protective Covers

Stollery Children's Hospital | ENT Surgical Theatre
Overview
During the 2021 COVID-19 pandemic, I had the opportunity to freelance with the Stollery Children’s Hospital’s ENT clinic to design and manufacture protective covers for operating theatre equipment. These covers helped mitigate the spread of harmful airborne particles and droplets during endoscopic
and surgical procedures.
Discipline
Medical Design
Year
2021
Hero image
Stollery Childrens Hospital exterior

Problem statement

How might we speed up post surgery sterilization procedures & mitigate the spread of aerosolized particles in ENT operating theatres during COVID-19?

How does the presence of COVID-19 affect sterilization procedures?

Graphic asset - rushing patient to ENT room
Graphic asset - endoscopic procedure
Graphic asset - sterilization procedure
Diagnosis
During diagnosis, patients may jerk
or cough in response to stimuli and release particles onto nearby equipment
Surgical procedure
During procedures, patients may continue to respond to stimuli, further spreading around  harmful particles
Sterilization
Fast patient turnovers result in poorly sterilized areas of equipment & increase long-term risks to ENTs

Solution

Poorly sterilized equipment place ENTs at a higher contraction risk of COVID-19 through surface contact. The solution called for a series of protective covers for equipment most difficult and most time consuming to sterilize between patient turnovers
Equipment to be designed for
Equipment breakdown
24" DELL Monitor

24" DELL Monitor

Monitors for general image viewing and data collecting
Pain point
Alcohol wipes damage screens during sterilization process
Needs
Protective screen that can be easily sanitized and handled

55" NEC Theatre Monitor

Provides detailed imaging during endoscopic procedures
Pain point
Alcohol wipes damage screens during sterilization process
Needs
Protective screen that can be easily sanitized and handled
55" NEC Threate monitor
Endoscopic monitor

Endoscope Monitor

Allows for high-fidelity image viewing during surgical procedures via endoscope tool
Pain Point
Rapid patient turnovers result in tight areas being missed during sterilization
Needs
Shield that covers all monitor electronics but is easily accessible

Zeiss XENON Microscope

Aids surgical procedures by providing better and more precise views, as well as tool manoeuvrability
Pain point
Machine scatters dust which can prolongs sterilization procedures
Needs
Monitors for general image viewing and data collecting
ZEISS Microscope

24" Dell Monitor | Fabrication

The final design features an acrylic uni-body with three bends and a curved cut-out for computer controls. Its seamless surfaces & curved edges ensure easy handling & sterilization. Cost-effective and minimizing material waste, it evolved from foam prototypes with obstructive rear flaps that were removed for better access and sterilization efficiency. Bent edges were taped for improved grip.
DELL monitor sketches
DELL monitor prototyping
DELL Monitor in-situ
DELL Monitor in-situ

55" NEC Theatre Monitor | Fabrication

The cover's front was secured by custom acrylic screw-on brackets for easy disassembly and replacement, ensuring easy sterilization. Initial prototypes had issues with bottom corners lifting due to the TV's angle, resolved by adding two bottom brackets. To prevent damage when placed on a mobile rolling unit, high density weather stripping was added for impact absorption.
NEC monitor sketches
NEC monitor in-situ
NEC monitor prototyping
NEC monitor in-situ

Endoscope Monitor | Fabrication

The final design protects all five sides of the monitor's rear. Two bottom flaps, secured with magnets, provide quick access to the monitor’s controls, aiding troubleshooting during procedures. The other flap facilitates easy power access, while the slotted side cutouts allow for organized, zip-tied wires, further decreasing sterilization time and easy maintenance.
endoscope monitor sketches
endoscope monitor prototyping
endoscope monitor in-situ
endoscope monitor in-situ

Zeiss XENON Microscope | Fabrication

The concept aimed for a simple box-like design with cutouts for heat dispersion and cable organization. Acrylic hinges supported multiple access doors tailored to the operating theatre's needs. Initially featuring one door, ENTs requested separate doors for accessing microscope features before and during surgery. Each served specific purposes, with cable holes covered by medical-grade silicone. Magnets maintained unity, anchored by existing screws, while additional equipment was neatly tucked aside.
ZEISS microscope sketches
ZEISS microscope prototyping
ZEISS microscope prototyping
ZEISS microscope in-situ

Manuacturing process

Acrylic sheets were cut into customized flat shapes, heated, and bent over a custom-made heat-bending apparatus. Once heated, the acrylic patterns were placed over various 3D printed moulds to achieve the desired form.
Home made heat bender
Home made heat bender
Custom built heat-bending machine

Challenges and reflections

1
Limited access to tooling, machining,
and materials due to pandemic restrictions
2
Hospital schedule time constraints affected on-site research & user testing phases
3
Limited access to ENT theatres, prompted by an influx of urgent cases