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Motorized Gynecological Examination Bed by Karma, designed by iMAC Engineering

Karma Medical needed a motorized gynecological examination bed with three-section hydraulic actuation, 500–850 mm height adjustment, and remote-controlled positioning for real clinical use.

Medical Device Design Product Engineering

Motorized Gynecological Examination Bed by Karma

This case study covers iMAC Design and Engineering Services’ complete mechanical design and engineering work on a motorized gynecological examination bed for Karma Medical.

The product required a three-section adjustable platform with controlled headrest, backrest, and legrest positioning. Key functions included hydraulic actuation, remote-controlled movement, gas spring-assisted headrest adjustment, and height adjustment from 500 mm to 850 mm.

iMAC handled the full mechanical engineering scope, including structural frame design, actuator placement, bracket engineering, gas spring mechanism integration, fluid collection provision, and DFM review for clinical durability.

Project Snapshot

Product Motorized Gynecological Examination Bed
Client Karma Medical
Industry Medical Devices and Healthcare
Services Medical Device Design and Development, Mechanical Engineering
Stage Concept to OEM-ready design
Design Scope Structural frame, actuator placement, bracket engineering, gas spring integration, height adjustment system, fluid collection provision
Motorized gynecological examination bed, three-section frame with hydraulic actuation

Engineering Challenges

Designing a three-section motorized examination bed for clinical use created a layered set of mechanical, structural, and ergonomic engineering challenges that had to be solved together.

  • Actuator and bracket alignment: Precise actuator placement was critical. Each actuator and bracket needed to transfer force through the correct motion path. Poor alignment would lead to binding, uneven movement, premature wear, or excessive stress at pivot joints.
  • Structural durability under repeated use: The frame had to withstand repeated articulation cycles, dynamic loading, and varying patient weights without deformation at joints, brackets, and mounting points.
  • Center-of-gravity stability: Stability across the full range of movement was equally important, since shifting the center of gravity through height and section changes creates instability if not controlled through frame geometry and reinforcement placement.
  • Dual-user height range: The 500 mm to 850 mm height adjustment range had to serve two user groups at the same time — patients needing easier access and caregivers needing an ergonomic working height.
  • Manufacturability and maintainability: All of these mechanisms had to integrate into a clinically usable platform that could be manufactured efficiently and maintained reliably in real hospital conditions.
Gynecological bed frame fabrication and welding at the manufacturing facility

Design Solutions

iMAC’s approach to the Karma bed was rooted in structured mechanical engineering and DFM-aware design decisions that addressed both performance requirements and long-term clinical reliability.

  • Three-section frame design: The headrest, backrest, and legrest were each aligned with their respective mattress areas, allowing the bed to support patient comfort and correct positioning through the full range of movement.
  • Actuator and bracket engineering: Dedicated brackets were designed for each actuator to guide controlled motion without misalignment or binding, set for torque efficiency and even load distribution across the frame.
  • Gas spring headrest integration: A gas spring mechanism was integrated to achieve controlled upward headrest movement up to 40 degrees from horizontal with smooth, adjustable resistance.
  • Center-of-gravity management: Bracket reinforcements and actuator mounts were distributed across the frame to maintain stability when multiple sections are elevated simultaneously.
  • DFM and clinical durability review: All design decisions were reviewed for fabrication feasibility, assembly efficiency, and reliable performance under repeated clinical use.
Motorized gynecological examination bed, headrest raised on a hydraulic lift frame

Key Findings

The engineering process produced a set of targeted design decisions that shaped a durable, clinically functional platform ready for OEM production.

  • Structural integrity: A central stud integrated into the base reduced flex during repeated movement and improved load distribution. A custom strip bracket secured the backrest frame and supported consistent pivot motion through actuation.
  • Clinical usability: Independent three-section control with remote actuation keeps adjustments hands-free and efficient during examinations.
  • Height range practicality: The 500 mm to 850 mm range serves mobility-limited patients while maintaining ergonomic conditions for clinical staff.
  • Hygiene provision: A fluid collection container supports drainage handling and clinical cleanliness.

Results and Impact

The Karma motorized gynecological examination bed moved forward as an OEM-ready product with all primary mechanical objectives met. The platform delivers reliable clinical performance across its full operating range — stable at both low and high positions, smooth through all articulation sequences, and practical for real hospital use.

Key Outcomes:

  • OEM-ready design: Structurally sound and ready for production deployment across hospital, rehabilitation, and assisted living environments.
  • Clinical usability achieved: Independent three-section control and the 500–850 mm height range support patient comfort and caregiver efficiency across a wide range of procedures.
  • Durable by design: Bracket reinforcements, central stud integration, and actuator placement collectively manage articulation loads and center-of-gravity shifts in long-term clinical use.
Finished motorized gynecological examination bed prototype at the Karma Medical facility

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