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Biomedical subjects

A Neetens

Publications and source records attributed to A Neetens.

At least 127 records · Page 7Linked to original sources
PubMed1977

Lacrimal flow.

Syncinetic reflex or isolated orbicularis muscle contraction squeezes the tearsac between Horner's muscle and the inner palpebral ligament, closes the canaliculi and prevents conjunctival fornix backflow, while the tears are expressed (pseudo-peristaltism) towards the nose through the flexible naso-lacrimal canal. The diameter at the level of the canaliculi should be kept optimal in order to allow proper suction towards the tearsac and free capillarity since surface tension varies to a lesser extent. Scopy of contrast lacrimal outflow-channels provides important information on the morphology and the physiopathology of the lacrimal ducts, ruling out eventual functional origin of the lacrimation. The technique is especially important in decision making for treatment (allergic conditions, congenital dacryocystitis) for evaluation of dacryocystorhinostomy, for the early diagnosis and management of infection, inflammation and posttraumatic conditions of the face and anterior skull.

Child, Preschool↗
PubMed1977

Oculomotor anomalies in sellar and parasellar pathology.

The authors report 19 cases where diplopia was the initial symptom of sellar pathology, Additionally, 5 cases with doubtful, diagnosis are discussed. Considering a series of 134 adenomata, the onset in 7 cases was intermittent diplopia with involvement of the third nerve.

Abducens Nerve↗
PubMed1977

Autoregulation of the blood supply to the anterior optic nerve and lamina cribrosa.

In the optic nerve an axial arterial system of peripheral origin is present; several intraneural collaterals of the central retinal artery are absent in the majority of cases while a rich pial network always exists. The question whether the central retinal artery should be considered as an important axial nutritional artery for the anterior optic nerve has to be answered in the negative. One or two large centrifugal collaterals running to the pial sheath-network probably play an autoregulatory role, protecting the laminar region from a temporary lack of blood supply during moderate rises in intraocular pressure.

Collateral Circulation↗
PubMed1977

Hyperproduction glaucoma.

Hyperproduction glaucoma is a tonographic clinical entity characterized by high IOP and normal C: 1. It may occur as open angle glaucoma spontaneously or pharmacologically induced. 2. It may be an inflammatory ocular hypertension characterized by a breakdown of the blood-aqueous barrier. The treatment of choice is topical and/or systemic drugs such as epinephrine and acetazolamide which inhibit aqueous inflow; glucocorticoids should be added in cases of the inflammatory type. The pathogenesis is directly related to hyperproduction of aqueous, depending chiefly on increased capillary hydrostatic pressure at the level of the ciliary body.

Aqueous Humor↗