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Biomedical subjects

H A Sisler

Publications and source records attributed to H A Sisler.

18 recordsLinked to original sources
PubMed1990

New minitrephine makes lacrimal canalicular rehabilitation an office procedure.

A new minitrephine, with a stainless steel tube of 0.81-mm outer diameter, 16-mm length, a plastic hub and handle assembly for manual rotation, Luer lock attachment to either standard or specially designed 3-ml syringe with spring-assisted plunger, and an intraluminal stylet--all disposable--has been designed by us principally for opening a distally occluded lacrimal canaliculus prior to stenting with any desired implant. Local anesthesia via a nasociliary nerve block makes this an office procedure. Other potential uses include transscleral globe biopsies of suspected malignancies, intraorbital biopsies, drainage of fluid-filled spaces wherein a beveled needle evacuation might undesirably pierce the far end of the cyst--all with possible ultrasonic monitoring--or the creation of a correctly sized, round, noncollapsible passage for a Molteno valve stenting of the anterior chamber, for intractable glaucoma.

Ambulatory Care↗
PubMed1990

A new ophthalmic microtrephine.

We present a new instrument designed to facilitate the microtrephination of tissues required in various ophthalmic procedures. This microtrephine is a 21-gauge stainless steel tube, 0.81 mm in diameter and 16 mm long, with a sharpened cutting end and a plastic finger-grip area to facilitate micro-rotation. A standard plastic luer hub allows the trephine to be used with a syringe, either a standard type or one with a spring-assisted plunger. Scar tissue, biopsy specimens, or abnormal inflammatory fluids can be suctioned into the syringe for subsequent pathologic examination.

Equipment Design↗
PubMed1982

Surgical correction of blepharoptosis and lower-eyelid retraction in dry-eyed patients.

A Fasanella-Servat upper-eyelid tarsal excision was coupled with reimplantation of the excised specimen into the lower lid between its antitarsal margin and the retractor muscles of the lower lid. The reimplantation of tissues preserved secretory elements in four dry-eyed patients whose upper-lid blepharoptosis and lower-lid retraction were both surgically corrected by this procedure.

Blepharoptosis↗
PubMed1982

One-way flow in the lacrimal drainage system: determinants from the basic sciences.

All life processes must be compatible with known physical laws. While the physiology of the lacrimal pump and valvular system are well known, the physical and histologic aspects related to anatomy remain to be clarified. Maximization of forward-directed capillarity, the operation of Bernoulli's law, the Venturi tube effect, and histologic microciliation are related to the system's basic anatomy and directed toward forward flow only, or, conversely, the avoidance of backflow of nasal secretions toward the conjunctival sac.

Cilia↗
PubMed1978

Iontophoretic local anesthesia for conjunctival surgery.

An iontophoretic unit, originally designed to deliver local anesthesia to the tympanic membrane, has been adapted for use on the tarsal conjunctiva before excision of conjunctivolithiasis plaques and other intra- and subconjunctival lesions.

Anesthesia, Local↗
PubMed1976

Injected mixture for hemostasis in dacryocystorhinostomy.

A mixture of epinephrine and hyaluronidase, injected into the naso-orbital recess at the start of dacryocystorhinostomy and into the nasal mucosa immediately after bone penetration, appears to have a greater hemostatic effect than epinephrine alone. Surgical time is shortened by the reduced need for angular vessel ligation, suction, cautery of bleeding, and nasal packing. Postoperative ecchymosis and nasal clotting are also reduced.

Drainage↗
PubMed1976

Senile ectropion and entropion: a comparative histopathological study.

A microscopic histopathological study was done on 500 full-eyelid-thickness surgical specimens: 25 with the diagnosis of senile ectropion and 25 with that of senile entropion. Five different staining techniques were used. There appears to be significantly more orbicularis and Riolan's muscle ischemia, atrophy, and collagen fragmentation with ectropion than with entropion. Entropion shows more septal and tarsal atrophy. In both conditions, the skin and conjunctiva show chronic inflammation and scarring as a constant feature. Statistical significance at the 1% level was present for all six characteristics studied. These histopathological changes, if not etiological, are at least concomitant features differentiating senile ectropion from entropion at the microscopic tissue level.

Aged↗