Quantitative Cell Culture Biocompatibility Testing of Medical Devices and Correlation to Animal Tests

1976 ◽  
Vol 4 (3-4) ◽  
pp. 235-261 ◽  
Author(s):  
R. E. Wilsnack
1998 ◽  
Vol 21 (3) ◽  
pp. 137-146 ◽  
Author(s):  
U. Wallrabe ◽  
P. Ruther ◽  
T. Schaller ◽  
W. K. Schomburg

The complexity of modern surgical and analytical methods requires the miniaturisation of many medical devices. The LIGA technique and also mechanical microengineering are well known for the batch fabrication of microsystems. Actuators and sensors are developed based on these techniques. The hydraulic actuation principle is advantageous for medical applications since the energy may be supplied by pressurised balanced salt solution. Some examples are turbines, pumps and valves. In addition, optical sensors and components are useful for analysis and inspection as represented by microspectrometers and spherical lenses. Finally, plastic containers with microporous bottoms allow a 3-dimensional growth of cell culture systems.


2021 ◽  
Vol 10 (36) ◽  
pp. 3152-3158
Author(s):  
Ramya Shree Gangadhar ◽  
Balamuralidhara V ◽  
Rajeshwari S.R.

BACKGROUND Biomaterial is defined as "any substance or combination of medicine, artificial or natural origin, which can be used at any time, in whole or part by a system that controls, adds to, or restores any tissue, organ or function". ISO 10993-1: 2018 standard defines bio compliance law as "the ability of a medical device or tool to perform a selected program with the acceptable response of experts". Incompatible factors cause chemical reactions in patients, with little or no side effects. The body can respond in a sort of way after the installation of medical devices, so testing and improvement is important here. Therefore, testing and improvement in this field are important. Biocompatibility is required for any significant use of components or materials in medical devices. Inconsistent factors create negative biological responses in patients, which may have serious consequences. Biomaterials are substances utilized in medical devices, especially in applications where the device is touched, temporarily embedded, or permanently implanted within the body. Because of the significant impact of biocompatibility, many countries have imposed regulations on medical device manufacturers to meet biocompatibility specifications. Here is a brief explanation about the biocompatibility and incompatibility parameters of medical devices with a human body and its need for biocompatibility of medical devices with the human body. Medical devices have improved doctors' ability to diagnose and treat disease, which has led to significant improvements in health and quality of life. Thus, medical devices are prone to various incompatibility issues and procedures that affect the biological environment must be followed. KEY WORDS Biocompatibility, Material Interactions, Sterilization, Medical devices, Biocompatibility Testing, Incompatibility Factors.


2021 ◽  
Vol 5 (4) ◽  
pp. 228-237
Author(s):  
Oleksandra Dmytrenko ◽  
Maryna Arkhypova ◽  
Darya Starosyla ◽  
Svitlana Rybalko ◽  
Michael Gevorkyan ◽  
...  

Background. Programs of preclinical safety studies of the health care products depend on the regulatory status of the investigated products. The classification of such products, in particular suppositories for rectal and vaginal use, is a critical step of developing tactics for their biological evaluation. Adaptation of biological evaluation methods for the medical devices based on the combination of biologically active substances, as well as evaluation of the results of such studies is urgent task of biomedicine. Objective. To substantiate the regulatory status and to carry out a biological evaluation of medical devices in the form of vaginal suppositories based on octenidine dihydrochloride ("Prodexyn") and in the form of rectal suppositories based on Saw palmetto, Levisticum officinale and Calendula officinalis extracts ("Pravenor"). Methods. Biological evaluation was conducted according to the requirements of ISO 10993 standards using in vitro and in vivo biological test systems (cytotoxicity in cell culture and the MTT test, sensitizing and irritating effect in guinea pigs). Results. The cytotoxicity (СС50) of the medical device "Prodexyn" extract in Vero cell culture was 8.35 μg/ml calculated as octenidine dihydrochloride and 416.65 μg/ml calculated as dexpanthenol. "Pravenor" medical device was found to be non-toxic in Vero cell culture. According to the results of MMT assay CC50 for octenidine dihydrochloride was 1.67 μg/ml, and 83.33 μg/ml – for dexpanthenol. CC50 indicators calculated for the different active ingredients of the medical device "Pravenor" were the following: 50 mg/ml for the dwarf palm berries extract (Saw palmetto), 16.67 mg/ml for the lovage roots extract (Levisticum officinale), and 16.67 mg/ml for the calendula flowers extract (Calendula officinalis). No sensitizing or skin irritating effects were observed in guinea pigs. Conclusions. Biological evaluation of medical devices in the form of rectal suppositories "Pravenor" and vaginal suppositories "Prodexyn" performed using in vitro and in vivo biological systems. It was demonstrated an acceptable level of safety of the products. The MTT test was 5 times more sensitive than the Vero cell culture method in determination of cytotoxicity.


Sign in / Sign up

Export Citation Format

Share Document