29
and a sophisticated security concept, the deviation from the planned end point can be kept below 0.2 mm, which reduces the risk of facial nerve damage signifi cantly.
Monitor Drilling Temperature
“During the drilling process, there is another risk that we need to take into account,” says Arne Feldmann, Biomechanics researcher and doctoral student at the University of Bern. “There is also the danger of degenerating the facial nerve solely by the drilling temperature, as the drilling trajectory is typically within a 0.5 mm range of the nerve. That is why it is very important to keep the drilling temperature below a critical threshold.”
The optimisation of this drilling process was the subject of a detailed pre-study conducted at the University of Bern. A purpose-built test rig was constructed in order to measure the temperature increase in the skull as a result of the drilling process. The entire process, for which cow bones were used, was monitored in detail by means of a FLIR thermal imaging camera and a load cell was used to measure drilling forces and torques. The researchers opted for a FLIR A655sc science-grade LWIR camera with a 50 µm close-up lens.
Affordable Research and Science Thermal Imaging
“It was very important for us to obtain a detailed thermal view of the bone structure, because we wanted to know exactly what happens during the drilling process in terms of temperature at any drilling depth,” said Arne Feldmann. “The area we were interested in is only about 10 mm in width and 30 mm in length. We were able to study this small window very accurately with the thermal camera. For a camera which is that affordable, the A655sc offered us a high level of image quality.”
With its uncooled detector, high resolution, and all of the cutting-edge functionality scientists and researchers have come to expect from FLIR, the A655sc brings affordable research and science thermal imaging and measurement to a whole new level. Combined with FLIR’s dedicated thermal analysis software, researchers have a powerful set of tools that allow them to achieve good results quickly.
“The test set-up would not have been successful without FLIR’s ResarchIR thermal analysis software,” Arne Feldmann continued. “We used ResearchIR to record the thermal video and to thoroughly analyse the results, including plotting out maximum temperatures and monitoring a number of critical points.”
Optimising the Drilling Process
“The results obtained from our experiments with the help of the FLIR A655sc have allowed us to defi ne an optimised drilling process,” said Arne Feldmann. “With the new minimally invasive and robot-based approach, safer, more gentle and less invasive cochlear implant surgery will be possible in the future.”
Thermal images acquired during the test set-up allowed researchers to compare standard drill bits with innovative, newly designed surgical drill bits. The patented new drill bit design clearly presented a signifi cant temperature reduction during the drilling process. The FLIR A655sc thermal imaging camera was also used to compare the temperature impact of different cooling and irrigation strategies. Furthermore, researchers discovered lower temperatures with a stepwise, interval based drilling procedure, as opposed to continuous drilling.
Read, Share and Comment on this Article, visit:
www.labmate-online.com/articles Digital Thermoregulator Takes Thermoregulation to the Next Level
software are a complete Data Logging System compliant with GLP Good Laboratory Practice and can be connected with the most common hot plate stirrers such as Velp Arex, Arex Digital PRO and Arec.X for unparalleled performance.
Velp presents the Vertex Digital Thermoregulator VTF EVO, the innovative solution that takes temperature control to the next level. VTF EVO and its TEMPSoftTM
State-of-the-art technology, fl exibility and reliability are the pillars of the development of this unique product. The VTF EVO is the only thermoregulator to offer the possibility to send the data directly from the hot plate stirrer to a computer and to allow a bi-directional communication end-to-end thanks to wireless technology.
The VTF EVO is ideal for a wide range of applications and meets the most demanding requirements in terms of precision, reliability and fl exibility of use. Thanks to the Fuzzy Logic technology, it automatically adjusts the thermoregulation to different factors such as power, load and thermal dispersion.
The Wireless DataboxTM , connected to the computer, enables the data transfer and the communication. For the fi rst time the operator will be able to control the temperature and to manage all the parameters of up to 10 different VTF EVO thermoregulators directly from the PC.
The TEMPSoft™ is an extremely intuitive software able to receive the temperature logs and to manage the VTF EVO directly from the PC. This easy–to-use software guarantees the complete control of the thermoregulation activities and thanks to the real time graph all the processes are visible at a glance.
With the VTF EVO it is possible to set temperature ramps (different time and temperature) and set points (with minimum and maximum temperature alarm thresholds) enhancing the overall performance of the thermoregulation process. The VTF EVO ramps and set points avoid thermal shocks and ensure a wider application range where automation and accurate temperature control is required.
40602@reply-direct.com
Figure 5. A 3DoF test rig for bone drilling integrated with FLIR thermal imaging was set up in order to measure the temperature increase in the skull as a result of the drilling process.
Priorclave Autoclaves - a global brand
A comprehensive range of robust laboratory autoclaves that offer exceptional and proven sterilising performance and reliability. Built to International Standards and supported by one of the most comprehensive support programmes, they offer the lab manager assured operational standards.
; more than 60 standard models ; up to 850 litre chambers ; all British design ; produced in own UK manufacturing centre
; extensive range of options enable tailoring to specific requirements
; all autoclaves feature anti-microbial finish ; FREE advice on product spec and installation ; autoclave service and calibration
Int Labmate 54 x 250 display -
FINAL.indd 1
benchtop / compact / top loading / front loading / pass-through
6196ad@reply-direct.com
“autoclaves are our business”
for more information visit:
www.priorclave.co.uk
or email:
sales@priorclave.co.uk 12/03/2015 11:34:29
WWW.LABMATE-ONLINE.COM
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44
