Definition of Obstruction:
Obstacle : A physical or mental barrier preventing the passage of something else into another place.
Obstacle is a word used in several senses. First it means a physical obstacle such as a wall, gate, or other kind of bar. Second it can mean any kind of barrier which prevents the passage of something from one place to another.
Third, it can refer to a condition of being prevented from doing something. Fourth, it can mean the absence of something. Fifth, it can mean the failure to do something. Sixth, it can mean the inability to accomplish anything. Seventh, it may have another sense as well; e.g., “the difficulty in getting around.” Eighth, it may be applied to a person or thing which does not move in a certain way (e.g., “a stubborn old man”). Ninth, it may apply to a situation where something is not done. Tenth, it may refer to a state of affairs in which things are not as they should be. Eleventh, it may refer to a particular action or behavior (e.g., “I’m going out now”). Twelfth, it may be applied to an idea or concept (e.g., “you’re always obstructing me with your questions”). Thirteenth, it may be applied to a person who acts as a block in some way (e.g., “he is an immovable obstacle”). Fourteenth, it may mean one of two things: either an opening in a wall for the admission of light and air or the glass itself.
Ostium (plural: ostia) : A small mouth or opening where something passes through, such as blood vessels or nerves. A hole. An inlet.
A pipe opening. A gate or door in a wall, etc. An entrance to a channel or canal. The mouth of a river or other waterway where it empties into another.
Obstruction is something which blocks the passage of another. In medicine, obstruction is an abnormal blockage by an object in the passageway of an organ or body part. In law, an obstruction is defined as a crime in which a person prevents or impedes another in the performance of their duty.
In general usage, an obstruction is anything which is an obstacle or impediment to action or progress.
Ostium verum : Actually refers to one of the two openings in the heart (the auricle). It is not actually used in modern medical terminology.
Ostium secundum : Is the other opening in the heart (auricle).
Ostium primum : Actually refers to one of the three (or four) openings on the surface of the heart that transmit blood into the left heart chambers from the veins.
Ostium secundum : Actually refers to one of the three (or four) openings on the surface of the heart that transmit blood into the left heart chambers from the veins.
Ostium tertium : Actually refers to one of the three (or four) openings on the surface of the heart that transmit blood into the left heart chambers from the veins.
Ostium quartum : Actually refers to one of the three (or four) openings on the surface of the heart that transmit blood into the left heart chambers from the veins.
Ostium quemdam : Actually refers to one of the three (or four) openings on the surface of the heart that transmit blood into the left heart chambers from the veins.
Orifice : A passageway for fluids (or other things) to pass through.
Perimysium : A covering consisting of connective tissue sheath that encloses bundles of skeletal muscle fibers.
Peritoneum : A membrane that lines the abdominal cavity and covers most of the organs within it.
Peritonium : This is a special serous membrane that is attached to certain organs within the abdomen and returns into the abdomen in such a way that it forms a closed sac; i.e., there are no openings between the peritoneum and the abdominal walls.
It completely envelopes only the intestines, omentum, and parietal peritoneum.
Plica vascularis : This is a special arterial structure that arises from the aorta and goes to the coronary arteries.
Porta hepatis : The opening of the common bile duct into the duodenum.
Proceeds : To start, begin, or set in motion.
Profunda : A fissure that divides the tongue into two parts.
Pterygopalatine fossa : The space behind the palate that contains the maxillary nerve, artery, and vein that pass to the face; the maxillary nerve, artery, and vein pass through it on their way to the face.
Ptosis : Drooping. In this case, it is a drooping of the upper eyelid.
Pulmonary artery : This is the artery that carries oxygenated blood from the heart to the lungs, where it picks up carbon dioxide and returns it to the heart.
Ramus arteriosus : One of the two parts into which the main truncus divides. It goes to the brain.
Ramus venosus : One of the two parts into which the main truncus divides. It goes to the rest of the body.
Recesses : A depression or indentation, like the one found in the human skull.
Reissner’s membrane : The middle layer of the three meninges. It is very delicate and is composed of tightly packed cells.
Rete mirabile : The network that carries blood to the brain through an extensive system of openings in the sphenoid bone. This system is found only in humans and other primates.
Reticular formation : A network of nerve tissue found just in front of the medulla. It is the main sensory relay center of the brain.
Rostral : Toward the beak. In this case, toward the front part of the skull in humans.
Salpinx : A shelly internal shell that might have been part of an early mollusk.
Saphenous : Relating to the saphenous vein.
Scaphoid fossa : A depression in the lateral part of the calcarine fissure.
Septum : A partition that divides something into two sections. In this case, the septum is found in the heart and serves as a wall between its upper and lower chambers.
Serosa : A simple term for a serous membrane.
Serous membranes : Tightly packed cells with a little fluid between them that line organs. The only exceptions are the brain and the outer layer of the heart. The inner layer of the heart is not covered by a serous membrane, but instead is covered by a simple squamous epithelium.
These membranes secret a fluid that surrounds the organs that they line.
Snuffbox : A depression located on the medial side of the pterion. It is the region where parts of several cranial nerves (including parts of the olfactory, optic, and trigeminal nerves) pass into and out of the brain.
Sphenoidal fissure : A fissure that goes from front to back and divides the middle part of the brain. It contains the bodies of small sphenoid bone as well as many important structures, such as the pituitary gland and the carotid arteries.
Stapes : One of the three smallest bones in the body. It forms the stirrup, which is part of the middle ear, just behind the eardrum.
Sources & references used in this article:
S2k-Leitlinie chronische obstipation: definition, pathophysiologie, diagnostik und therapie by V Andresen, P Enck, T Frieling, A Herold… – Zeitschrift für …, 2013 – d-nb.info
Symptome in der Palliativmedizin: Obstipation by E Klaschik – 2003 – books.google.com
Diagnosis and management in children with severe and protracted constipation and obstipation by M Davidson, MM Kugler, CH Bauer – The Journal of Pediatrics, 1963 – Elsevier
Chronische Obstipation und Stuhlinkontinenz by J Barnert, B Birkner, G Bleijenberg, GE Coremans… – 2013 – books.google.com
Diagnostik und chirurgische Therapie der chronischen Obstipation by A Herold – Viszeralchirurgie, 2001 – enddarm-zentrum.de