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Clinical Focus

  • Anesthesia

Academic Appointments

Professional Education

  • Board Certification: American Board of Anesthesiology, Pediatric Anesthesia (2013)
  • Board Certification: American Board of Anesthesiology, Anesthesia (2012)
  • Fellowship: Stanford University (2012) CA
  • Residency: Stanford University (2011) CA
  • Internship: MetroHealth Medical Center (2008) OH
  • Medical Education: Case Western Reserve School of Medicine (2007) OH

Research & Scholarship

Clinical Trials

  • Transnasal Humidified Rapid-Insufflation Ventilatory Exchange (THRIVE) Use in Pediatric Procedures Not Recruiting

    THRIVE (Transnasal Humidified Rapid-Insufflation Ventilatory Exchange) refers to the use of high-flow nasal cannula to augment the ability to oxygenate and ventilate a patient under general anesthesia. The use of high-flow nasal cannula oxygen supplementation during anesthesia for surgical procedures has been a recent development in the adult population, with limited data analyzing the pediatric population. This study will determine whether high flow nasal cannula oxygen supplementation during surgical or endoscopic procedures can safely prevent desaturation events in children under anesthesia.

    Stanford is currently not accepting patients for this trial. For more information, please contact Thomas J Caruso, M.D., M.Ed., 650-723-5728.

    View full details


All Publications

  • Application of Echogenic Technology for Catheters Used in Ultrasound-Guided Continuous Peripheral Nerve Blocks JOURNAL OF ULTRASOUND IN MEDICINE Mariano, E. R., Yun, R. D., Kim, T. E., Carvalho, B. 2014; 33 (5): 905-911


    Limited data exist regarding the echogenicity of perineural catheters, but visualization is crucial to ensure accurate placement and efficacy of the subsequent local anesthetic infusion. The objective of this study was to determine the comparative echogenicity of various regional anesthesia catheters. In an in vitro porcine-bovine model, we compared the echogenic qualities of 3 commercially available regional anesthesia catheters and 1 catheter under development to optimize echogenicity. Outcomes included visual echogenicity ranking, image quality, and scanning time, as assessed by 2 blinded investigators. The experimental catheter was found to be more echogenic than 2 of the 3 comparators.

    View details for DOI 10.7863/ultra.33.5.905

    View details for Web of Science ID 000335620700018

    View details for PubMedID 24764346

  • Temperature-controlled radiofrequency treatment of tonsillar hypertrophy for reduction of upper airway obstruction in pediatric patients. Archives of otolaryngology--head & neck surgery Coticchia, J. M., Yun, R. D., Nelson, L. n., Koempel, J. n. 2006; 132 (4): 425?30


    To determine if temperature-controlled radiofrequency (TCRF) tonsil reduction and adenoidectomy (TCRF&A) and conventional tonsillectomy and adenoidectomy (T&A) are statistically similar in outcome and to compare morbidity between TCRF&A and conventional T&A.Randomized control trial.Tertiary care children's hospital.The study population comprised 23 patients aged 2.6 to 12.5 years with symptoms of obstructive sleep apnea, hypertrophic tonsils with no other areas of upper airway obstruction with the exception of hypertrophic adenoids, and a body mass index (calculated as weight in kilograms divided by the square of height in meters) of less than 30.Temperature-controlled radiofrequency tonsil reduction (mean +/- SD, 12.6 +/- 1.5 ablations per patient and 994.68 +/- 91.88 J per insertion) and adenoidectomy or traditional bovie T&A.Primary outcomes were respiratory distress index and total volume reduction. Secondary outcomes include postoperative pain, daytime sleepiness, speech and swallowing problems, weight and diet, narcotic use, and analogue snoring scale.The respiratory distress index difference for TCRF&A was 5.63 vs 6.56 for standard T&A. On postoperative day 1 for the 13 patients who underwent TCRF&A, 0 reported severe pain, 11 (85%) had mild to moderate pain, and 2 (15%) had no pain. In the 10 patients who underwent standard T&A, 1 (10%) had severe pain and 9 (90%) had mild to moderate pain. By postoperative week 1, all TCRF&A patients experienced mild or no pain, whereas 1 (10%) of the standard T&A patients still had moderate pain. Mean visual analogue snore scores (0-10) 4 weeks after surgery were less than 1 for both groups. The mean +/- SD weight loss at postoperative week 1 for TCRF tonsil reduction patients was 1.0 +/- 3.5 lb (0.45 +/- 1.58 kg) vs 4.6 +/- 3.9 lb (2.07 +/- 1.76 kg) for standard T&A patients. Return to normal diet at postoperative week 1 occurred in 11 TCRF&A patients (85%) and 0 standard T&A patients.The respiratory distress indexes were similar for TCRF&A patients and standard T&A patients. In addition, there were similar analog snoring scales, decreased pain, and weight loss.

    View details for DOI 10.1001/archotol.132.4.425

    View details for PubMedID 16618912

  • Age-, site-, and time-specific differences in pediatric deep neck abscesses. Archives of otolaryngology--head & neck surgery Coticchia, J. M., Getnick, G. S., Yun, R. D., Arnold, J. E. 2004; 130 (2): 201?7


    To clarify presentations, organisms, and locations of deep neck abscesses in children.Retrospective review.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.Resolution of abscess.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%).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.

    View details for DOI 10.1001/archotol.130.2.201

    View details for PubMedID 14967751

  • mSin3A/histone deacetylase 2- and PRMT5-containing Brg1 complex is involved in transcriptional repression of the Myc target gene cad. Molecular and cellular biology Pal, S. n., Yun, R. n., Datta, A. n., Lacomis, L. n., Erdjument-Bromage, H. n., Kumar, J. n., Tempst, P. n., Sif, S. n. 2003; 23 (21): 7475?87


    The role of hSWI/SNF complexes in transcriptional activation is well characterized; however, little is known about their function in transcriptional repression. We have previously shown that subunits of the mSin3A/histone deacetylase 2 (HDAC2) corepressor complex copurify with hSWI/SNF complexes. Here we show that the type II arginine-specific methyltransferase PRMT5, which is involved in cyclin E repression, can be found in association with Brg1 and hBrm-based hSWI/SNF complexes. We also show that hSWI/SNF-associated PRMT5 can methylate hypoacetylated histones H3 and H4 more efficiently than hyperacetylated histones H3 and H4. Protein-protein interaction studies indicate that PRMT5 and mSin3A interact with the same hSWI/SNF subunits as those targeted by c-Myc. These observations prompted us to examine the expression profile of the c-Myc target genes, carbamoyl-phosphate synthase-aspartate carbamoyltransferase-dihydroorotase (cad) and nucleolin (nuc). We found that cad repression is altered in cells that express inactive Brg1 and in cells treated with the HDAC inhibitor depsipeptide. Using chromatin immunoprecipitation assays, we found that Brg1, mSin3A, HDAC2, and PRMT5 are directly recruited to the cad promoter. These results suggest that hSWI/SNF complexes, through their ability to interact with activator and repressor proteins, control expression of genes involved in cell growth and proliferation.

    View details for DOI 10.1128/mcb.23.21.7475-7487.2003

    View details for PubMedID 14559996

    View details for PubMedCentralID PMC207647

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