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So Comfortable
The SQ.line design prioritises surgeon wellbeing, understanding it is a key factor in patient outcomes and surgical career development. Frequent bone punching can cause hand and arm pain, with spine surgeons at particular risk for musculoskeletal disorders (MSDs). MSDs can significantly impact physical health, even forcing some to take leaves of absence, limit or alter their practice, or retire early. [1]
Result: 27% reduction of pressure peaks with SQ.line® KERRISON [9]
Up to
0%
of spine surgeons suffer from musculoskeletal disorders [1]
We know that spine surgeons are at high risk of musculoskeletal disorders (MSDs) as a result of their work, and spine surgeons are particularly at risk. According to systematic reviews, the prevalence of MSDs among spine surgeons is estimated to be between 35% and 60%. These conditions take a significant toll on surgeons, with 12% of surgeons with MSD requiring a leave of absence, a change in their practice, or early retirement. [1]
At B. Braun we understand the importance of minimising harm to the treating surgeon while maximising patient outcomes. That's why we've developed the SQ.line® KERRISON – a bone punch with a handle designed for ergonomics and personal comfort. [2]
Showed a
0%
reduction in pressure peaks [3]
Our SQ.line® KERRISON bone punch handle design is suited to multiple hand sizes – it was extensively tested with people across multiple glove sizes. This ergonomic handle design is intended to minimise pressure points and reduce hand fatigue for comfortable use during extended surgical procedures. [3]
In a comparative study with a leading competitor for forehand punching, the SQ.line® KERRISON showed a 27% reduction in pressure peaks. [2]
Finally, the SQ.line® KERRISON offers the highest ergonomic comfort compared to other bone punches, as confirmed by medical users. [3] This feature further adds to the bone punch's ability to reduce harm to the treating surgeon. [2]
Whether you are performing fore- or backhand punching, you can count on our bone punch design to deliver enhanced ergonomics. The SQ.line® KERRISON is designed to be comfortable for both techniques, with its handle shape providing a well rated grip. [3]
So Comfortable!
[1] Kolz JM, Wagner SC, Vaccaro AR, Sebastian AS. Ergonomics in Spine Surgery. Clin Spine Surg. 2022 Oct 1;35(8):333-340. doi: 10.1097/BSD.0000000000001238. Epub 2021 Jul 28. PMID: 34321393.
[2] Handle comfort evaluation report. The SQ.line® KERRISON handle was compared in terms of comfort during use to its predecessor and one of its competitor’s handle. It is based on the visualization of prevailing surface pressure distributions during the actuation by means of pressure measuring foil. The SQ.line® KERRISON showed smaller areas of high surface pressure and a more homogeneous pressure distribution.
[3] Usability test with neurosurgeons. The usability test with neurosurgeons was performed to validate multiple customer requirements in terms of the performance and the ergonomics of SQ.line® KERRISON. The test was performed with 12 neurosurgeons within a simulated clinical environment. The performance and the ergonomic properties were rated positive.
[4] Manual cutting endurance test. Three samples of two worst-case SQ.line® KERRISONs and previous Aesculap KERRISONs each were used to cut lamb spine 25 000 times. All SQ.line® KERRISONs were perfectly functioning after the test cycles without repair and thereby showed up to three times increased durability.
[5] Performance test aged. Five samples of the most delicate SQ.line® KERRISON bone punch with three corresponding previous Aesculap KERRISONs were compared. After aging the SQ.line® KERRISONs by 500 reprocessing cycles, they successfully passed all defined test criteria for the wearing parts. The SQ.line® KERRISON outperformed the previous Aesculap KERRISONs.
[6] Jamming test. Five samples of three different SQ.line® KERRISONs and previous Aesculap KERRISONs were tested on lamb spine with 50 repeated punches. The SQ.line® KERRISON showed no jamming for the duration of the test.
[7] Usability test with CSSD and OR personnel. The usability test with CSSD and OR personnel was performed to validate multiple customer requirements in terms of the reprocessing and handling of the upwards cutting SQ.line® KERRISON. Ten people with an average CSSD experience of more then five years where interviewed. The suitability for reprocessing and the handling were rated positive.
[8] Handle comfort evaluation report. The SQ.line® KERRISON handle was compared in terms of comfort during use to its predecessor and one of its competitor’s handle. It is based on the visualization of prevailing surface pressure distributions during the actuation by means of pressure measuring foil. The SQ.line® KERRISON showed smaller areas of high surface pressure and a more homogeneous pressure distribution.
[9] Handle comfort evaluation report. The SQ.line® KERRISON handle was compared in terms of comfort during use to its predecessor
and one of its competitor’s handle. It is based on the visualization of prevailing surface pressure distributions during
the actuation by means of pressure measuring foil. The SQ.line® KERRISON showed smaller areas of high surface pressure and
a more homogeneous pressure distribution.
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