Biomedical subjects
C D Belcher
Publications and source records attributed to C D Belcher.
Acute glaucoma following Nd: YAG laser membranotomy.
A 65-year-old aphake with a functioning filtration bleb underwent neodymium:YAG laser membranotomy. Shortly thereafter, he acutely developed pain, nausea, and visual blur with an intraocular pressure of 42 mm Hg. The mechanism of the acute glaucoma is believed to be occlusion of the fistula by herniated vitreous.
Laser photodisruptors. Damage mechanisms, instrument design and safety.
Short-pulse neodymium: YAG clinical laser systems permit noninvasive incision of transparent intraocular structures. Selection and safe use of these photodisruptors, however, require a limited understanding of certain basic physical principles. These principles are reviewed and applied in a series of optical experiments designed to study the performance and safety of clinical, short-pulse laser systems. The results of these experiments are presented, in addition to an analysis of current and proposed photodisruptors.
Current status of neodymium:YAG laser photodisruptors in ophthalmology: Part I.
Explore the source record for details and available documents.
Current status of neodymium: YAG laser photodisruptors in ophthalmology: Part II.
Explore the source record for details and available documents.
Argon laser trabeculoplasty in the presurgical glaucoma patient.
The trabecular meshwork in 334 eyes of 260 patients with medically uncontrolled primary and secondary open-angle glaucoma was treated with the argon laser. The average intraocular pressure reduction obtained was 7.1 mm Hg. Tonographic data showed significant increase in the facility of outflow. Glaucoma surgical intervention was avoided in 87.5% of phakic eyes and in 62.1% of aphakic eyes. Laser trabeculoplasty was found to be effective in primary open-angle glaucoma, pseudoexfoliation glaucoma, pigmentary glaucoma, angle recession glaucoma, glaucoma secondary to uveitis, and in eyes with failed glaucoma surgical procedures. The length of follow-up in this series ranged from one week to 21 months, with an average of five months. The major complication noted was a rise in intraocular pressure following treatment. In one eye, a small central island of vision was lost due to this intraocular pressure elevation. Treating one-half of the angle in each of two treatment sessions separated by a few weeks reduces the degree of this pressure elevation. The glaucoma status of 3% eyes was made worse after treatment with trabeculoplasty.
"Hybrid" myosin filaments from smooth and striated muscle.
Explore the source record for details and available documents.
Medical care in United States and elsewhere.
Explore the source record for details and available documents.