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Biomedical subjects

J T Katzen

Publications and source records attributed to J T Katzen.

6 recordsLinked to original sources
PubMed2002

Trigeminocardiac reflex: a unique case of recurrent asystole during bilateral trigeminal sensory root rhizotomy.

BACKGROUND: The trigeminocardiac reflex is the sudden-onset of dysrhythmia and hypotension during manipulation of any of the branches of the trigeminal nerve. The trigeminal nerve and cardioinhibitory vagus nerve constitute the afferent and efferent pathways in the reflex arc. The trigeminocardiac reflex has been reported to occur during craniofacial surgery, balloon-compression rhizolysis of the trigeminal ganglion, and tumour resection in the cerebellopontine angle. PATIENT & METHOD: A 2-year-old male patient with haemangioma near the sella turcica underwent rhizotomies of both sides of the dorsal sensory roots, of the trigeminal nerves for palliation of intractable trigeminal pain. RESULTS: In this report, we experienced two unexpected episodes of asystole after transection of the sensory roots of the trigeminal nerves. CONCLUSION: Sectioning of the intracranial dorsal sensory root of the trigeminal nerve provides clear evidence of the central role of the trigeminal nerve as the afferent pathway of the trigeminocardiac reflex arc.

Aged↗
PubMed2001

Imaging the neonatal mandible for accurate distraction osteogenesis.

The position of mandibular teeth is difficult to document in the neonatal patient. Panorex images are difficult to obtain in an uncooperative pediatric patient. The new technique presented by the authors uses computed tomographic data to create a curved, reformatted image of the mandible, and generates an image similar to a panorex image. This curved, reformatted mandibular image provides accurate visualization of the mandible and mandibular teeth. This technique allows for precise pin placement and osteotomy in distraction osteogenesis.

Humans↗
PubMed2000

Syndromes involving craniosynostosis and midface hypoplasia.

This article reviews a number of well-known syndromes involving craniofacial synostosis and associated midface deficiencies. Syndromes discussed include Apert's, Crouzon's, Saethre-Chotzen, and Carpenter's. Clinical characteristics and genetic defects are discussed. A general approach to surgical management is outlined.

Acrocephalosyndactylia↗
PubMed2000

Endoscopic approach for the resection of forehead masses.

Over the past several years, surgery aided by the endoscope has come into favor for a number of reasons. Because it is minimally invasive surgery, it has less morbidity, thus, reduced postoperative pain and complications. It results in earlier mobilization and shorter hospitalization, and most importantly, it contributes to an improved cosmetic appearance as a result of a shortened incision line concealed within the hairline in most cases. We have proposed an alternative approach to the surgical resection of forehead masses by means of the endoscope, which has proven to be useful not only for diagnosis but also as a therapeutic tool for the removal of forehead lesions. This report described the clinical experience with the removal of forehead masses in four patients. The cases illustrated the feasibility and ease of resecting a variety of forehead masses with excellent cosmetic results. We hope that more plastic surgeons will use the proposed technique and will continue to explore the safe limits of endoscopic plastic surgery.

Adult↗