Christine M. Clark

Omega‐3 polyunsaturated fatty acid supplementation attenuates blood pressure increase at onset of isometric handgrip exercise in healthy young and older humans

Aging is associated with alterations of autonomic nerve activity, and dietary intake of omega‐3 polyunsaturated fatty acids, such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) found in fish oil (FO), can modulate autonomic nerve activity. However, the effect of omega‐3 polyunsaturated fatty acid consumption on age‐related cardiovascular responses at the onset of isometric handgrip exercise, a time of rapid autonomic adjustments, is unknown. Accordingly, 14 young (25 ± 1 years; mean ± SE) and 15 older (64 ± 2 years) healthy subjects ingested 4 g FO daily for 12 weeks. On pre‐ and postintervention visits, participants performed 15‐sec bouts of isometric handgrip at 10%, 30%, 50%, and 70% maximal voluntary contraction (MVC) while beat‐to‐beat systolic, diastolic, and mean arterial blood pressure (SBP, DBP, MAP; Finometer) and heart rate (HR; electrocardiogram) were recorded. All baseline cardiovascular variables were similar between groups and visits, except DBP was higher in older subjects (P < 0.05). FO increased erythrocyte EPA and DHA content in both groups (P < 0.05). FO attenuated MAP and DBP increases in response to handgrip in both age groups (change from baseline during 70% MVC handgrip pre‐ and post‐FO: young MAPΔ 14 ± 2 mmHg versus 10 ± 2 mmHg, older MAPΔ 14 ± 3 mmHg versus 11 ± 2 mmHg; young DBPΔ 12 ± 1 mmHg versus 7 ± 2 mmHg, older DBPΔ 12 ± 1 mmHg versus 7 ± 1 mmHg; P < 0.05). FO augmented the PP (SBP‐DBP) increase with 70% MVC handgrip in both groups (P < 0.05), but did not alter SBP or HR increases with handgrip. These findings suggest that FO supplementation attenuates MAP and DBP increases at the onset of isometric handgrip exercise in healthy young and older humans.

Varicella Infection Complicated by Group A Beta-Hemolytic Streptococcal Retropharyngeal Abscess

An unimmunized 19-month-old child presented with a retropharyngeal abscess and coincident varicella infection. The abscess resolved with operative drainage. This is the first published report of this connection, although varicella is known to be associated with abscesses in general. Practitioners should be aware that cervical abscesses may complicate varicella infections.

Aging augments renal vasoconstrictor response to orthostatic stress in humans

The ability of the human body to maintain arterial blood pressure (BP) during orthostatic stress is determined by several reflex neural mechanisms. Renal vasoconstriction progressively increases during graded elevations in lower body negative pressure (LBNP). This sympathetically mediated response redistributes blood flow to the systemic circulation to maintain BP. However, how healthy aging affects the renal vasoconstrictor response to LBNP is unknown. Therefore, 10 young (25 ± 1 yr; means ± SE) and 10 older (66 ± 2 yr) subjects underwent graded LBNP (-15 and -30 mmHg) while beat-to-beat renal blood flow velocity (RBFV; Doppler ultrasound), arterial BP (Finometer), and heart rate (HR; electrocardiogram) were recorded. Renal vascular resistance (RVR), an index of renal vasoconstriction, was calculated as mean BP/RBFV. All baseline cardiovascular variables were similar between groups, except diastolic BP was higher in older subjects (P < 0.05). Increases in RVR during LBNP were greater in the older group compared with the young group (older: -15 mmHg Δ10 ± 3%, -30 mmHg Δ20 ± 5%; young: -15 mmHg Δ2 ± 2%, -30 mmHg Δ6 ± 2%; P < 0.05). RBFV tended to decrease more (P = 0.10) and mean BP tended to decrease less (P = 0.09) during LBNP in the older group compared with the young group. Systolic and diastolic BP, pulse pressure, and HR responses to LBNP were similar between groups. These findings suggest that aging augments the renal vasoconstrictor response to orthostatic stress in humans.

Trends in the management of secondary post-tonsillectomy hemorrhage in children

OBJECTIVE To define current practices in management of secondary post-tonsillectomy hemorrhage (PTH) in children by pediatric and general otolaryngologists. INTRODUCTION Bleeding after tonsillectomy is common. Our goal was to describe management methods across the U.S. METHODS Questions regarding perioperative management and treatment in response to three hypothetical cases featuring secondary post-tonsillectomy bleeding were posed via REDCap survey. Comparisons were made for pediatric otolaryngology fellowship training, regions of residency training and current practice, practice type, and number of years in practice. RESULTS A total of 400 surveys were distributed with 104 responses. Fellowship-trained respondents were more likely to have been in practice for less than ten years (41.5% versus 17.8%) and to practice in an academic setting (67.3% versus 13.6%). They were less likely to prescribe antibiotics after tonsillectomy and more likely to prescribe acetaminophen (98.3% versus 80.4%), ibuprofen (79.3% versus 56.5%), and narcotics (74.1% versus 50.0%) compared to general otolaryngologists. When faced with a post-tonsillectomy patient with visible clot but no active bleeding, pediatric otolaryngologists were less likely to remove the clot (31.6% versus 54.3%) and more likely to proceed to the OR (75.9% versus 56.5%) and admit the patient (87.9% versus 68.9%). Few regional differences were encountered; however, factors influencing the decision to pursue operative intervention varied by region. CONCLUSION Pediatric otolaryngologists are more likely to follow American Academy of Otolaryngology guidelines for tonsillectomy perioperative management. They also manage patients with secondary PTH differently than general otolaryngologists. Management trends are similar by region but salient factors considered in the decision-making process vary.

Omega‐3 polyunsaturated fatty acid supplementation reduces blood pressure but not renal vasoconstrictor response to orthostatic stress in healthy older adults

Older adults exhibit augmented renal vasoconstriction during orthostatic stress compared to young adults. Consumption of omega‐3 polyunsaturated fatty acids, such as eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) found in fish oil (FO), modulates autonomic nerve activity. However, the effect of omega‐3 polyunsaturated fatty acid consumption on the renal vasoconstrictor response to orthostatic stress in young and older adults is unknown. Therefore, 10 young (25 ± 1 years; mean ± SEM) and 10 older (66 ± 2 years) healthy adults ingested 4 g FO daily for 12 weeks, and underwent graded lower body negative pressure (LBNP; −15 and −30 mmHg) pre‐ and post‐FO supplementation. Renal blood flow velocity (RBFV; Doppler ultrasound), arterial blood pressure (BP; photoplethysmographic finger cuff), and heart rate (electrocardiogram) were recorded. Renal vascular resistance (RVR), an index of renal vasoconstriction, was calculated as mean BP/RBFV. All baseline cardiovascular values were similar between groups and visits, except diastolic BP was higher in the older group (P < 0.05). FO supplementation increased erythrocyte EPA and DHA content in both groups (P < 0.05). FO did not affect RVR or RBFV responses to LBNP in either group, but attenuated the mean BP response to LBNP in the older group (older −30 mmHg: pre‐FO −4 ± 1 vs. post‐FO 0 ± 1 mmHg, P < 0.05; young −30 mmHg: pre‐FO −5 ± 1 vs. post‐FO −5 ± 2 mmHg). In conclusion, FO supplementation attenuates the mean BP response but does not affect the renal vasoconstrictor response to orthostatic stress in older adults.

Sleep disordered breathing may signal laryngomalacia

RESEARCH ARTICLE Sleep Disordered Breathing May Signal Laryngomalacia Christine M. Clark, Dale S. DiSalvo, Jansie Prozesky and Michele M. Carr The Pennsylvania State University, College of Medicine, Hershey, PA, USA Department of Anesthesiology, University of Rochester Medical Center, Rochester, NY, USA Department of Anesthesiology and Perioperative Medicine, Division of Pediatric Anesthesia, The Pennsylvania University, College of Medicine, Hershey, PA, USA Department of Surgery, Division of Otolaryngology-Head and Neck Surgery, and Department of Pediatrics, The Pennsylvania University, College of Medicine, Hershey, PA, USA