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Dresden University of Technology
Institute of Electromechanical and
Electronic Design



Electromechanical Design

Electronic Design

Contract Services



Faculty and Staff



Research Focus

Predevelopment of Medical Devices


  • Analysis of existing devices and components

  • Design of novel functional structures

  • Development and construction of functional models

  • Manufacture and tests of samples




Automatic insulin injection device with a disposable fluidic part and a reusable electronic part


Diabetes mellitus is a metabolic disease and leads to high blood sugar level. In Germany alone, more than 6 million people are affected by this disease. Until today you can commonly treat diabetes only by the change in lifestyle, the administration of insulin or insulin secretion stimulating drugs. For the injection of insulin in Germany mainly insulin pens are used. These devices enable the patient to inject insulin in a quick and discrete manner.

Insulin pens are based on the insulin syringe and consist of a dosing mechanism and a pre-filled glass cartridge. Due to the complex handling of reusable insulin pens there are often problems in the cartridge exchange and operation of the dosing mechanism.

In cooperation with a leading industrial partner an automatic insulin pen was developed. This device is based on an innovative function structure and consists of a low-cost disposable fluidic component for pumping the insulin and a reusable electronic part containing the costly components such as electronics and the power supply.


Functional model of an automatic

injection device

Functional model of a cartridge with a flexible wall


Minimally invasive rapid palatal expansion with an implant-supported

hyrax screw


Often children suffer from misaligned teeth, which are caused by a too narrow upper jaw. This results in the deterioration of the patients aesthetics and an increased susceptibility to infections of the respiratory tract may occur.

An effective therapy method is the palatal expansion of the upper jaw. There is a large number of orthodontic devices that are directly anchored to the teeth or on the palate bone. At the Department of Orthodontics (University Clinics, Technical University of Dresden), an apparatus for a long period of time is successfully used, which is fixed on one side by a titanium implant and on the other side by a bone screw in the upper jaw bone.

As part of a diploma thesis in collaboration with the Department of Orthodontics, the existing apparatus was optimized. By integrating new technical features an easy adaptation of the device to the patients jaw during surgery is now possible.

The apparatus was subjected to extensive reliability tests and already successfully used in the treatment of a patient.


Previous device before optimization

Optimized device with an additional joint allows easy adaptation


Innovative Cooling and Compression System to Decrease Swellings on Fractures at Extremities


The most common injuries in traumatology include the ankle fracture and the wrist fracture. They belong to the fractures of extremities, which have the highest incidence with 80% related to the totality of all fractures.

Shortly after the injury process, a swelling of the skin and soft tissue envelope occurs in the fracture area. A chirurgical operation in the area of the fracture cannot be carried out in this time. The swelling must decrease first, which in experience may take 7 to 14 days. This leads to high treatment costs, long delay times and persistent pain periods for the patients.

In order to reduce the swelling and to accelerate the swelling decline the effect of mild hypothermia by cold treatments already has been examined. A temperature decrease by 10 K reduces the metabolic rate by about 50%. Due to the reduced energy consumption and the decrease of the oxygen demand in the fracture area an adjustment on the trauma reduced local oxygen supply in the tissue takes place, which is resulted by the edema and hemorrhage in the fracture area. The local hypothermia reduces the metabolism and further circulation and leads to a decrease in post-traumatic swelling by inhibiting the local inflammatory response.

In collaboration with the Department of Trauma and Reconstructive Surgery, University Clinics, Technical University of Dresden a device matched to the human thermoregulatory system is being developed, which realizes an individual adaptation to the patient by time-varying cooling functions and swelling-dependent deformations of the cooling bandage.



Realization of the desired temperature in the interplay of human and machine


Dr.-Ing. René Richter
Dipl.-Ing. Annekathrin Päßler


Last modified: 28.04.2016