Biomedical subjects

James E Arnold

Publications and source records attributed to James E Arnold.

4 recordsLinked to original sources

PubMed2005

Anesthetic management for laser excision of recurrent respiratory papillomatosis in a third trimester parturient.

Recurrent respiratory papillomatosis (RRP) is characterized by the development of laryngeal papillomas, which can produce partial to complete upper airway obstruction. Patients with RRP often require intermittent surgical excision to treat symptoms such as hoarseness and stridor, and to control progression of the lesions. The anesthetic management of such patients is challenging, and it requires carefully coordinated care between an anesthesiologist and otolaryngologist. We present 2 cases of general anesthesia administration during surgical excision of laryngeal papillomas, both occurring during the third trimester of separate pregnancies in the same parturient. The complexity of management was amplified in these cases because of the physiological and anatomical changes associated with pregnancy, along with the need to monitor fetal well-being. Possible complications included complete airway obstruction, pulmonary aspiration of gastric contents, hypoxemia, fetal distress, and preterm labor. Because pregnancy may lead to activation of human papillomavirus, the causative organism of RRP, management guidelines are provided for anesthesiologists who may care for patients with RRP during pregnancy.

Adult↗

PubMed2005

Vestibular-evoked myogenic potentials in infancy and early childhood.

OBJECTIVE: Hearing impairment and the often concurrent loss of vestibular function, which is rarely assessed in infants, can both impair sensory integration critical to the development of normal motor coordination. This study demonstrates, for the first time, that vestibular function in infants can be noninvasively assessed using vestibular-evoked myogenic potentials (VEMPs). Our intentions were to demonstrate that VEMPs can be reliably recorded from neonates and to compare neonatal VEMPs with those obtained from normal adults. STUDY DESIGN: Prospective cohort study. METHODS: Myogenic evoked potentials induced by air- and bone-conducted auditory stimuli were recorded from the sternocleidomastoid muscles of 12 normal neonates and 12 neonates with various clinical findings. These included infants with bilateral atresia of the external auditory canals, Treacher-Collins syndrome, and neonates who failed universal neonatal screening. RESULTS: With the exception of one patient with hearing loss, reproducible biphasic VEMPs were recorded from the sternocleidomastoid muscle of all the infants using loud, short tone-burst sounds. CONCLUSIONS: The VEMP has characteristics that differentiate it from the postauricular response and the Jaw reflex. The VEMPs were dominant on the side ipsilateral to the stimulated ear. The overall morphology of the neonatal VEMP is quite similar to that of adults. The major neonatal differences are a shorter latency of the n23 peak and higher amplitude variability. Our results suggest that recording of the VEMP in neonates with various audio-vestibular problems provides useful information about vestibular function in this population and may provide information that leads to better care and rehabilitation for neonates at risk of developmental and motor system delay.

Audiometry, Pure-Tone↗

PubMed2004

Age-, site-, and time-specific differences in pediatric deep neck abscesses.

OBJECTIVE: To clarify presentations, organisms, and locations of deep neck abscesses in children. DESIGN: Retrospective review. SETTING: Tertiary children's hospital. The study population comprised 169 patients younger than 19 years who were surgically treated for deep neck abscesses between 1989 and 1999. MAIN OUTCOME MEASURE: Resolution of abscess. RESULTS: Neck mass (91%), fever (86%), cervical adenopathy (83%), poor oral intake (66%), and neck stiffness (59%) were common in all ages. Patients younger than 4 years, compared with patients 4 years or older, presented with agitation (50% vs 14%), cough (35% vs 14%), drooling (27% vs 12%), lethargy (46% vs 33%), oropharyngeal abnormalities (45% vs 60%), respiratory distress (5% vs 2%), retractions (5% vs 2%), rhinorrhea (53% vs 15%), stridor (4% vs 2%), and trismus (14% vs 53%). Children younger than 1 year were infected with Staphylococcus aureus (79%) vs group A streptococcus (6%). Children 1 year or older were infected with group A streptococcus (29%) vs S aureus (16%). Retropharyngeal or parapharyngeal regions were involved in children 1 year or older (49%) vs younger than 1 year (21%). Anterior or posterior triangles and submandibular or submental regions were involved in 39% and 36%, respectively, of children younger than 1 year vs 30% and 23%, respectively, of children 1 year or older. Retropharyngeal and parapharyngeal abscesses yielded group A streptococcus (34%) vs S aureus (11%). Anterior and posterior triangle abscesses yielded S aureus (35%) vs group A streptococcus (19%), as did submandibular and submental abscesses (42% vs 19%). CONCLUSIONS: Abscesses in children younger than 1 year affected anterior or posterior triangles and submandibular or submental regions, yielding S aureus. Abscesses in children 1 year or older affected retropharyngeal or parapharyngeal regions, yielding group A streptococcus.

Abscess↗

PubMed2002

Presentation, diagnosis, and management of deep-neck abscesses in infants.

OBJECTIVE: To clarify the presenting signs and symptoms, clinical course, pathogenic organisms, and management of deep-neck-space abscesses in infants. DESIGN: Retrospective chart review. SETTING: Tertiary care academic children's hospital. PATIENTS: Records of 25 patients 9 months or younger with deep-neck-space abscesses from July 1989 through May 1999 were reviewed. MAIN OUTCOME MEASURE: Resolution of abscess. RESULTS: Presenting symptoms included neck mass, 92% (n = 23); fever, 60% (n = 15); and dysphagia and/or poor intake by mouth, 36% (n = 9). Overall, patients were symptomatic for a mean duration of 3.8 days before presenting to the hospital; 21 of 22 evaluated patients had elevated white blood cell counts. Imaging included 68% computed tomographic scan (n = 17) and 44% plain radiographs (n = 11). On the basis of radiology and operative findings, locations of the abscesses were as follows: anterior triangle, 8; parapharyngeal, 5; posterior triangle, retropharyngeal, and undefined, 3 each; submandibular, 2; and parotid, 1. Of 17 scanned patients, 13 had some degree of airway compromise evident on computed tomography. All were treated with incision and drainage, 3 of 25 intraorally and 22 of 25 externally. Pus was identified in all 25; 20 of these grew Staphylococcus aureus, 1 grew group A Streptococcus, and 4 grew no organism. All patients received intravenous antibiotics for a mean of 4.8 days and oral antibiotics for a mean of 11 days. Only 1 patient required a second procedure. CONCLUSIONS: Deep-neck-space abscesses in infants are rapidly progressive, often cause airway compromise, and usually present with fever and neck mass. The most common pathogen is S aureus. Patients are effectively treated with incision and drainage coupled with intravenous followed by oral antibiotics.

Abscess↗