Philosophical debates about the concept of disease, particularly of mental disease, might benefit from reconsideration and a closer look at the established terminology and conceptual structure of contemporary medical pathology and clinical nosology. The concepts and principles of medicine differ, to a considerable extent, from the ideas and notions of philosophical theories of disease. In medical theory, the concepts of disease entity and pathologicity are, besides the concept of disease itself, of fundamental importance, and they are essentially connected to the (...) concepts cause of disease or etiological factor, natural course or natural history of disease, and pathological disposition. It is the concept of disease entity that is of key importance for understanding medical pathology and theory of disease. Its central role is shown by a short reconstruction of its main features and its intrinsic connection to the concept of pathologicity. The meaning of pathologicity is elucidated by explicating the underlying criteria. (shrink)

Der Krankheitsbegriff ist sowohl ein Begriff der Lebenswelt als auch ein theoretischer Begriff der medizinischen Wissenschaft. Das Paper zeigt die wichtigsten Unterschiede auf. Im ersten Teil wird die Grundstruktur der Krankheitslehre anhand von 7 Prinzipien dargestellt. Im zweiten Teil werden einige besonders wichtige Unterschiede in Form von Frage und Antwort explizit erklärt. Prinzipien: Die Krankheitslehre hat das individuelle menschliche Leben unter dem Aspekt von Krankheit und Gesundheit zum Gegenstand. Die Krankheitslehre fasst Krankheiten als abgrenzbare Anteile eines individuellen Lebens auf. Jedes (...) krankhafte Phänomen ist entweder eine Krankheit oder deren Manifestation. Jede einzelne Krankheit ist ein Fall einer allgemeinen Art: einer Krankheitsentität. Krankheitsentitäten werden definiert durch eine Kombination von Erstursachen, Wirkbedingungen, Reaktionen und Folgen im Organismus, Verlaufsformen und Ausgängen. Krankheitsentitäten sind durch sie definierende pathologische Merkmale gekennzeichnet. Die Pathologizität von Merkmalen lässt sich durch ein System von Krankheitskriterien charakterisieren. Ein fraglich pathologischer Lebensvorgang kann durch Rekurs auf die Ätiopathologie der zugehörigen Krankheitsentität theoretisch eingeordnet werden. Fragen : Gibt es eine scharfe Grenze zwischen Gesundheit und Krankheit? Gibt es zwischen Gesundheit und Krankheit einen neutralen Bereich von Zuständen? Kann die Medizin eine positive Definition von Gesundheit angeben? Kann man Gesundheit mit vollständigem subjektivem Wohlbefinden gleichsetzen? Ist Krankheit etwas Unnatürliches? Können Menschen auch dann gesund sein, wenn sie eine Krankheit oder Behinderung haben? Ist jemand krank, bei dem ein Risikofaktor festgestellt wird? Dürfen gegen eine Krankheit nur Personen mit nachgewiesener Erkrankung behandelt werden? Ist Krankheit immer ein Übel? Welche normativen Implikationen hat der wissenschaftliche Krankheitsbegriff? (shrink)

The article tries to demonstrate how the tools and perspectives of action theory may be used in philosophy of medicine and medical ethics. In the first part, some concepts and principles of action theory are reconstructed and used to sketch a view of medicine as a science of actions. The second part is a contribution to the discussion on medical ethics in the same issue of this journal and consists in a detailed analysis of the main arguments and critical remarks (...) from the point of view of action theory. (shrink)

This article has a threefold intention. 1. It intends to contribute to the clarification of the question in what respect medicine may be called a science and in what respect a practice. 2. It proposes a concept of clinical methodology (including clinical-ethical aspects), as a theory of medical practice that is one component of theoretical medicine. 3. It sketches an approach and some steps towards a systematic analysis of medical-clinical practice. In the first part, the position that medicine is a (...) practical science is criticized. It is shown that the supposed opposition of theoretical and practical sciences is misconstrued. The relevant distinctions are those between knowledge, research, and scientific practice. In the second part, an analysis of the structure and function of descriptive and normative data and of clinical knowledge and principles in clinical practice is given, and a strategy for solving the deep problems of clinical methodology and ethics is sketched. (shrink)

Medical expert systems (MES) are knowledge-based computer programs that are designed for advising physicians on diagnostical and therapeutical decision-making. They use heuristic methods developed by Artificial Intelligence researchers in order to retrieve from large knowledge-bases information needed in the situation. Constructing the knowledge-base of a MES embraces the problem of explicating and fixing the conceptual, causal and epistemic relations between a lot of medical objects. There is a number of preconditions which any adequate representation of such knowledge must fulfil, among (...) them the conditions of consistency, of completeness, of unequivocality, etc. Existing systems for classification and coding, like ICD and SNOMED, are not designed for the needs of constructing expert systems or, more generally, of knowledge processing and knowledge engineering. Their syntax is not sufficiently rich for expressing the more complex structures of (medical) knowledge. What is needed, is a language that can be used for expressing logical and descriptive relations between medical objects and facts, approximately at the level of the language of second order predicate logic. Simultaneously, it must be possible to process this language at the machine level. This can be achieved by using some dialects of the programming language LISP or, particularly, by using the programming language PROLOG. Thus, in order to achieve a suitable classification system, it is necessary to develop a system of medical data structures and predicates expressed in LISP or PROLOG. (shrink)