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Biomedical subjects

M S Karlan

Publications and source records attributed to M S Karlan.

At least 19 recordsLinked to original sources
PubMed1979

Fractures of the zygoma. A geometric, biomechanical, and surgical analysis.

We present a four-part study of the cosmetic results of common zygomatic fracture reduction techniques: (1) a geometric analysis of an idealized paper and clay model; (2) a topographic analysis of zygomatic fractures in the dry skull; (3) a biomechanical analysis of fixation techniques in the fresh cadaver; and (4) a retrospective and prospective review of our clinical experience. The following are concluded: Alignment of the fracture at three points and fixation at two stable points provide the most accurate and satisfactory postoperative results. Masseteric contraction may cause late displacement in poorly fixed fractures. Two-point interosseous fixation at the "buttress" fracture and the frontozygomatic fracture is suitable for routine surgery. The infraorbital rim may be aligned through the gingivobuccal sulcus incision. Transcutaneous incisions may be limited to the brow incision. The transconjunctival approach is suitable for orbital floor repair.

Biomechanical Phenomena↗
PubMed1979

Contour analysis in plastic and reconstructive surgery.

Three-dimensional measurements of living objects may be made using various biostereometric techniques. Moire topography provides one-step contour line maps. It is a potential low-cost adjuvant to current photographic and cephalometric techniques for documentation of surface deformities. A relatively simple apparatus may be used with instant-processing film to produce immediate contour maps superimposed on the object image on the film. There is significant qualitative information highlighted by the fine resolution of the system. This immediate had data may be quantitatively analyzed by hand with ruler and/or caliper. In the future, off-line quantitative analysis may be made by computer. Geometric constraints of the system and examples of use of the technique are provided. Emphasis is placed on facial asymmetries that are difficult to analyze from plain photographs and inaccessible to data analysis from lateral cephalometric roentgenographs.

Adolescent↗
PubMed1978

Complications of sinusitis: what to watch for.

Sinus infection remains a common cause of orbital inflammatory disease, and prompt diagnosis is essential. A team approach early in the course of the disease, with an otolaryngologist serving as coordinator, is recommended. If vigorous medical therapy fails, abscess formation should be suspected and surgical drainage instituted without delay. Of 24 patients hospitalized with complications of sinusitis, 13 were found to have acute inflammatory disease and 11 had mucocele formation. Mortality in patients with acute inflammatory was 30%; in those with intracranial extension of infection it was 67%.

Adolescent↗
PubMed1978

Improved treatment via home monitoring refractory vertigo.

The ubiquity of dizziness in clinical practice and the complexity of diagnosis and treatment has necessitated the development of a home monitoring procedure which assists the patient in collecting information concerning the course of his condition and his condition and his response to therapy. A case report of a patient with refractory, long-term, posttraumatic vertigo is presented to demonstrate the feasibility and utility of this procedure. It was found that (1) the patient was able to monitor his progress continuously for 118 days; (2) the information generated appeared to be valid; and (3) this information was integrally associated with a functional improvement in the patient's condition.

Adult↗
PubMedDate not supplied

Optokinetic suppression of aberrant vestibular reactions: an observation.

It has long been known that optokinetic nystagmus may be modified by vestibular inputs. We have suppressed an aberrant vestibular response and associated gastrointestinal sensations by use of an optokinetic stimulus simultaneous to the positional stimulus in a patient with paroxysmal positional vertigo. This single subject study utilized several optokinetic conditions, and patterned its stimulus presentations to control for visual fixation and vestibular habituation. Objective recordings of eye movements (ENG) were made simultaneously with subjective evaluation of "dizziness" on a simple magnitude estimation scale.

Adult↗
PubMedDate not supplied

Gelatin film sandwich in tympanoplasty.

A technique is presented that utilizes two sheets of gelatin film as a sandwich to provide a scaffold for medial support and lateral cover to fascia grafts while permitting visual inspection of both fascia and tympanic membrane.

Fascia↗
PubMedDate not supplied

Anterior cervical pain syndromes.

The paucity of clinical findings in patients with glossopharyngeal neuralgia, superior laryngeal neuralgia, styloid process syndrome, hyoid syndrome, or carotidynia presents an enigma to the patient and the physician. Manifest symptoms appear extraneous or incongruous unless the essential element is identified. Common to all these syndromes is the radiation of pain over the neck and face, starting from the anterior cervical area of the neck. Case histories of seven patients are presented. The rationale of underlying pathophysiologic mechanisms is discussed and supported by relevant recent basic pain research, and conceptual speculations are presented.

Adult↗
PubMedDate not supplied

Moire topography in facial plastic surgery.

Moire topography, a form of biostereometrics, is a technique that provides one-step contour maps. Facial measurements so obtained may be useful in reconstructive surgery.

Face↗