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PubMedDate not supplied

Bioengineering: the advent of metabiology (part II).

The ability to modify or replace organs or functions and to intervene in the transmission of hereditary characteristics is a fundamental turning point in the development of living organisms and of bioengineering. The theoretical potential of metabiology--the intervention from the outside on functions, organs and sub-organs through artificial organs as well as genetic engineering-- is briefly reviewed. Specific goals are proposed and engineering capabilities needed to achieve them are assessed. The impact on engineering and bioengineering of metabiology is examined and some fundamental issues of public policy concerning metabiology and bioengineering are proposed. (Part I of this paper was published in the July-Sept. 1981 issue of the Journal of Clinical Engineering.).

Artificial Organs↗

PubMed1979

Small hospitals manage clinical equipment.

Small hospitals can develop clinical engineering programs that meet their needs by using regional shared clinical engineering services or by hiring engineering technicians.

Biomedical Engineering↗

PubMed2005

E-learning for assistive technology professionals--a review of the TELEMATE project.

The Telematic Multidisciplinary Assistive Technology Education project (TELEMATE) was conducted during 1998-2001 by a consortium of seven European organisations involved in rehabilitation engineering and education. Assistive technology professionals work in a rapidly developing field but are few in number and widely dispersed, therefore, electronic delivery of their education is particularly advantageous. TELEMATE took existing concepts and standards in education to create and test an e-learning framework. As well as providing an appropriate learning environment, the aim was to share teaching resources and encourage a sound and consistent understanding of assistive technology across the European Union. This paper explores work carried out and the subsequent outcomes of the project.

Biomedical Engineering↗

PubMed2005

Engineering and medical applications of diatoms.

Biologists, and diatomists in particular, have long studied the properties of single-cell algae, and engineers are just discovering how to exploit features unique to these organisms. Their uniform nanopore structure, microchannels, chemical inertness, and silica microcrystal structure suggest many nanoscale applications. This paper proposes three potential research initiatives taking advantage of diatom morphology and mechanical and chemical properties: (1) embedding diatom frustules in a metal-film membrane; (2) magnetizing frustules for pinpoint drug delivery; and (3) producing silica nanopowders from frustules. The potential benefits of each initiative and its technical challenges are outlined.

Biomedical Engineering↗

PubMed1999

A review and methodologic critique of the literature refuting whiplash syndrome.

The validity of whiplash syndrome has been a source of debate in the medical literature for many years. Some authors have published articles suggesting that whiplash injuries are impossible at certain collision speeds; others have stated that the problem is psychological, or is feigned as a means to obtain secondary financial gain. These articles contradict the majority of the literature, which shows that whiplash injuries and their sequelae are a highly prevalent problem that affects a significant proportion of the population. The authors of the current literature critique reviewed the biomedical and engineering literature relating to whiplash syndrome, searching for articles that refuted the validity of whiplash injuries. Twenty articles containing nine distinct statements refuting the validity of whiplash syndrome were found that fit the inclusion criteria. The methodology described in these articles was evaluated critically to determine if the authors' observations regarding the validity of whiplash syndrome were scientifically sound. The authors of the current critique found that all of the articles contained significant methodologic flaws with regard to their respective authors' statements refuting the validity of whiplash syndrome. The most frequently found flaws were inadequate study size, nonrepresentative study sample, nonrepresentative crash conditions (for crash tests), and inappropriate study design. As a result of the current literature review, it was determined that there is no epidemiologic or scientific basis in the literature for the following statements: whiplash injuries do not lead to chronic pain, rear impact collisions that do not result in vehicle damage are unlikely to cause injury, and whiplash trauma is biomechanically comparable with common movements of daily living.

Accidents, Traffic↗

PubMed1998

Tissue engineering: generation of differentiated artificial tissues for biomedical applications.

A new field in biomedical science has been established. Cell biologists, engineers, and surgeons now work within a team. Artificial connective, epithelial, or neuronal tissues are being constructed using living cells and different kinds of biomaterials. Numerous companies and laboratories are presenting dynamic developments in this field. Prognoses predict that, at the beginning of the coming century, the industry of tissue engineering will reach the importance of the present genetic technology. An enormous demand for organ and tissue transplants motivates research activities and drives the acquisition of innovative techniques and creative solutions. At the front of this development is the creation of artificial skin for severely burned patients and the generation of artificial cartilage for implantation in articular joint diseases. Future challenges are the construction of liver organoids and the development of an artificial kidney on the basis of cultured cells. In this paper we show strategies, needs, tools, and equipment for tissue engineering. The presupposition for all projects is the induction, development, and maintenance of differentiation within the tissue under in vitro conditions. As experiments in conventional culture dishes continued to fail, new cell and tissue culture methods had to be developed. Tissues are cultured under conditions as close as possible to their natural environment. To optimize adherence or embedding, cells are grown on novel tissue carriers and on individually selected biomatrices or scaffolds. The tissues are subsequently transferred into different types of containers for permanent perfusion with fresh culture medium. This guarantees constant nutrition of the developing tissue and prevents the accumulation of harmful metabolites. An organo-typical environment for epithelial cells, for example, is obtained in gradient containers, which are permanently superfused at the apical and basal sides with different media. Long term experiments result in cultured tissues in a quality thus far unreached.

Biomedical Engineering↗

PubMed2003

Ethical considerations in bioengineering research.

Biomedical science and engineering have made rapid advancements in the field of medicine over the past few decades. New ethical problems arising from this technology are influencing biomedical research more and more. It is disturbing that bioengineering professionals have had relatively little contact with moral and legal theory in light of these developments and particularly since they represent the forefront of new medical innovations. The objective of this communication is to introduce the study of bioethics and the use of principlism when examining bioengineering problems and dilemmas. Specific examples derived from actual proceedings, such as the Baltimore case, will alert scientists to the importance of misconduct in academic society. Cases will be used to illustrate how tools learned in this presentation are applied to analyze bioethical issues. New technology has a large social impact and is setting the standard of care for treatment. The health care system continually relies on researchers to produce improvements in patient therapy. Society will increasingly expect scientists to be morally responsible for the research they perform and uphold those virtues that ensure good ethical conduct.

Biomedical Engineering↗

PubMedDate not supplied