Sogo Design... Ten years of focus on medical health the only track.
Cooperative customers: well-known confidential customers
Project Name: Medical Handle Industrial Design
Cooperation content: design analysis | appearance design | structural design | prototype production | accompanying running assistance
1. design analysis-let the "handle" disappear
Laparoscopy, electric hook, ultrasonic scalpel ...... and then advanced energy platform, but also through a section of about 20 cm metal rod and human body dialogue. The "one-size-fits-all" cylindrical shape of the traditional handle forces the doctor to continuously resist torsion, clamping force and vibration during the 4-6 hour operation, resulting in wrist fatigue and decreased fineness. The design goal of the new handle is only one: when the instrument passes through the cannula, the doctor forgets the existence of the "handle" and only the "intention" reaches the tissue.
2. Design Language-Putting "Sports Equipment" into "Aseptic Operating Room"
Main vision: the triangular prism gradually changes to the "water drop section" of the cylinder, which not only retains 360 degrees of rotational freedom, but also gives the "three-sided logic" of the positioning of the finger belly ";
Color: gun gray anode ring + RAL 9002 medical white, cancel highlight polishing, avoid shadowless lamp reflection;
Material: 50% glass fiber PA shell, surface Ra 0.8 μm, can withstand 350 cycles of sterilization (134 ℃ high pressure steam);
Brand DNA: tail 5 ° angle and the host "Jensare" blue ring to form a family characteristics, a glance to identify the platform ownership.
3. Design Details-Millimeter Weight Reduction, Newton Drag Reduction
Torque Trim
After the head is installed, the center of gravity moves forward by 12mm, and the tail cavity of the handle is embedded with 8 g tungsten alloy counterweight, so that the overall center of gravity falls on the second knuckle of the index finger, and the wrist torque is reduced by 28%.
Double density grip area
The outer layer is covered with 35 Shore A liquid silicone to provide a 2.1 coefficient of friction; the inner layer is covered with 60 Shore A PP skeleton to ensure rigidity. The finger contact area is etched with a "micro-texture" 0.2mm deep and 0.8mm spacing, which still maintains a 1.5 coefficient of friction under blood lubrication conditions and reduces the risk of slippage by 60%.
360 ° Infinity Roller
7 mm diameter roller, 30 g pressing trigger, providing 0.1mm scale feedback; The surface is rhombic knurled and can be accurately controlled by wearing double-layer gloves, realizing single-finger electrocutting/electrocoagulation switching and eliminating the "invalid stroke" of thumb displacement ".
Two-way ratchet lock
Hidden under the roller, the cutter head can be locked for rotation by 0.3 N · m, and the cutter head can be unlocked by pressing 0.1 s again to meet the continuous action of "left hand sewing-right hand drawing thread" without helping the mirror.
damping island structure
A 0.05mm thick PVD metal-rubber composite gasket is added between the knife bar and the handle to absorb the 55 kHz high-frequency vibration of the ultrasonic knife, and the RMS acceleration of the palm is reduced by 42%, which significantly delays the "white finger syndrome" caused by long-term holding ".
One-button replacement
The stroke of the side push button is 3mm, the gradient of the force value is clear, and the removal of the cutter head is completed in 3 s; the color of the button is coded in the same color as the label of the cutter head to prevent misinstallation.
Drop-proof wire clamp
The 180-degree rotating wire clamp at the tail can clamp Φ3-6mm cable, touch the ground before the handle in case of accidental fall, absorb impact, and reduce maintenance rate by 37%.
4. ergonomics-make the 95th percentile hand shape "just right"
Circumference: the maximum diameter of the grip area is 35mm, which is suitable for the 5th percentile (67mm hand length) of Chinese women to the 95th percentile (197mm hand length) of men;
Angle: the angle of the triangular surface is 120 °, matching the angle of the thumb to the palm, reducing the ulnar deviation;
Force value: the finger pinch force decreased from the traditional 22 N to 14 N, and the EMG electromyogram score decreased by 33% in 4 hours of surgery;
Surface temperature: add aluminum nitride thermal conductive particles to the silica gel, and continuously cut the handle for 30 min. The temperature rise of the handle is less than 2 ℃ to avoid grip relaxation caused by "hot hands;
Logo: The blue function icon is 2 mm high and 0.1mm raised. Gloves stained with blood can still be recognized by touch.
5. Clinical Validation-Numbers Speak
Randomized controlled cholecystectomy (n = 60): The VAS score of wrist pain decreased by 40%, the positioning error of the cutter head decreased by 0.8mm, and the suture speed increased by 18% in the new handle group;
First use by residents: the learning curve was shortened from 15 to 8, and the error rate was reduced by 50%.
Future Prospects of 6. -- From "Mechanical Handle" to "Perception Portal"
In the next step, the thin film pressure sensor and IMU will be integrated to capture the grip force, torsion angle and acceleration in real time, which will be transmitted back to the host computer through Bluetooth LE, and the AI algorithm will give "fatigue warning" or "skill tips". It is even linked with the force feedback trolley to realize "digital twin of remote hand feeling".
Conclusion
When designers accurate the center of gravity to the millimeter and quantify the coefficient of friction to one decimal place, the medical handle is no longer a cold stainless steel rod, but an extension of the surgeon's nerve endings. Every time the 0.1mm tip moves, there is a silent revolution about "people-tools-life" behind it. Sogo Design: www.soogot.com