Biomedical subjects

M M Parks

Publications and source records attributed to M M Parks.

At least 73 records · Page 4Linked to original sources

PubMed1977

Intracapsular aspiration.

Through a 2-mm. limbal incision, the aspiration of the lens is accomplished; this assures a strong eye immediately after operation. It frees the eye from the complications associated with the large incision required for linear extraction of the lens. Intracapsular aspiration of the entire lens cortex and nucleus is performed through a 2-mm. hole in the anterior capsule near the equator. Posterior synechiae are prevented by leaving the anterior capsule intact and in apposition with the posterior iris surface, assuring a round, mobile pupil. An axial 5-mm. hole placed through the collapsed anterior and posterior lens capsule usually remains free of secondary membrane formation, obviating the need for further surgery. The complication of vitreous presentation in the corneoscleral incision is managed by performing an anterior vitrectomy with an instrument that cuts and aspirates the vitreous.

Adult↗

PubMed1976

The role of the fascia in muscle surgery.

Mishandling of the fascial tissues during surgery on the extraocular muscles accounts for unsatisfactory alignment of the eye in the primary position; restricted movement of the globe; scarred, injected, heaped conjunctiva; and changes in the normal eyelid level. These hardships may be impossible to overcome by performing secondary surgery. The most serious and frequently recurring abuse of the fascia during muscle surgery is the needless penetration of the Tenon's capsule beyond 10 mm. from the limbus, which results in prolapse of the fat cushion into the spaces that are normally between the movable fascial planes and sclera. The prolapsed fat infiltrates into the sclera and muscle capsules and undergoes fibrofatty proliferation; with time, cicatrization of these scarred tissues pulls the eye to a deviated position, restricting its normal movement. Also, the fat cushion migrates forward under the conjunctiva toward the limbus, causing the unsightly appearance of injected yellowish fleshy tissue near the limbus. A patient's ocular motility can be ruined for life and his appearance deformed because of a surgeon's disrespect for the important role Tenon's capsule plays in the motility of the globe.

Fasciotomy↗

PubMed1975

Recession of the lateral recti. Effect of Preoperative fusion and distance-near relationship.

The importance of both preoperative fusion and the distance-near alignment relationship to the results of recession of the lateral recti for correction of exodeviation was studied. Satisfactory alignment was achieved after this procedure in 78% of patients with constant exodeviation and 80% of patients with intermittent exodeviation. In each fusion status, initial overcorrection of up to 20 prism diopters gave the highest percentage of good results (constant exodeviation patients, 88%; intermittent, 89%). Fifty-six percent of the satisfactorily realigned constant exodeviation patients and 69% of intermittent exodeviation patients remained satisfactorily realigned over an average follow-up interval of five years. If convergence insufficiency was present, satisfactory realignments noted at five to eight weeks could be maintained thereafter in 40% of patients. Where there was no preoperative convergence insufficiency, satisfactory results were maintained in 64% of patients with "high" and 68% of patients with "normal" distance-near ratios.

Follow-Up Studies↗

PubMed1975

Superior oblique tendon sheath syndrome of Brown.

Twenty-four patients with true superior oblique tendon sheath syndrome (Brown's syndrome) were extensively examined surgically. Since a tight or short anterior sheath of the superior oblique tendon was not present in any of our cases, we are not able to support the theory that this form of the syndrome is due to a congenital anomaly of the anterior sheath. The superior oblique tendon was taut and shortened in only two cases; in all the others it was limp, even in attempts to elevate the eye passively in adduction. Thus the majority of cases of constant congenital Brown's syndrome remain unexplained with no obvious abnormality found at surgery in any of the six extraocular muscles. However, our surgical findings did suggest that a restrictive band posterior and inferior to the globe was responsible for the limited elevation in adduction.

Child↗

PubMed1974