Optimal sites for throat cultures.
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Humans↗
Biomedical subjects
M L Macknin
Publications and source records attributed to M L Macknin.
Oral dexamethasone for treatment of persistent middle ear effusion.
A double-blind controlled study of oral dexamethasone (in a 2-week tapering dose from .15 mg/kg/d) v placebo in 49 pediatric patients (mean age 3.7 years) with persistent asymptomatic middle ear effusion of three or more weeks duration was conducted. Middle ear effusion resolution was determined by a myringotomy-validated algorithm that combined pneumatic otoscopy and tympanometry. Four weeks after completing treatment, 1/26 (4%) patients receiving dexamethasone and 2/23 (9%) patients receiving placebo had completely cleared their middle ear effusion (95% confidence interval -0.05 +/- 0.14). Five of 26 (19%) patients receiving dexamethasone and 6/23 (26%) patients receiving placebo had improved their hearing in all affected ears by 10 dB or more (95% confidence interval -0.07 +/- 0.23). Oral dexamethasone as used in this study was not effective in treating persistent middle ear effusion in children.
Acute Disease↗
Head-banging with subsequent hemoglobinuria and acute renal failure.
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Acute Kidney Injury↗
The effect of prolonged tourniquet application on serum bicarbonate.
BACKGROUND: Many clinicians believe that prolonged tourniquet application lowers the serum bicarbonate concentration in samples drawn from that limb, but this effect has never been examined prospectively. OBJECTIVE: To test the effect of prolonged tourniquet application before phlebotomy on serum bicarbonate concentration in healthy adults. METHODS: We drew blood samples from 27 healthy adult volunteers without a tourniquet and again 1, 3, and 5 minutes after applying a blood pressure cuff and inflating it to the mean arterial pressure. RESULTS: The mean bicarbonate concentration was 27.3 +/- 2.26 mmol/L (standard deviation) at baseline, 27.7 +/- 2.39 mmol/L at 1 minute, 27.7 +/- 2.05 mmol/L at 3 minutes, and 27.7 +/- 1.96 mmol/L at 5 minutes. The mean change in bicarbonate concentration from baseline was -0.04 +/- 1.02 mmol/L at 1 minute, 0.44 +/- 1.05 mmol/L at 3 minutes, and 0.44 +/- 1.31 mmol/L at 5 minutes. The mean lactate concentration was 1.1 +/- 0.28 mmol/L at baseline, 1.3 +/- 0.65 mmol/L at 1 minute, 1.2 +/- 0.52 mmol/L at 3 minutes, and 1.2 +/- 0.36 mmol/L at 5 minutes. The mean change in lactate concentration from baseline was 0.15 +/- 0.67 mmol/L at 1 minute, 0.11 +/- 0.11 mmol/L at 3 minutes, and 0.12 +/- 0.37 mmol/L at 5 minutes. CONCLUSIONS: Prolonged tourniquet application before phlebotomy does not lower the serum bicarbonate concentration in healthy adults.
Adult↗
Effect of inhaling heated vapor on symptoms of the common cold.
A double-blind, randomized study tested the efficacy of steam (technically, heated, humidified air) inhalation in the treatment of common cold symptoms. Two 20-minute treatments spaced 60 to 90 minutes apart were given at the time of enrollment. The active device (Rhinotherm, Netzer-Sereni, Beer Yaacov, Israel) delivered 40 L/min of saturated air at 40 degrees C to 42 degrees C, while the identical-appearing placebo delivered 2 L/min of ambient air at 20 degrees C to 24 degrees C. There were 34 patients in the placebo group and 32 in the active group. Significant improvements in the placebo-treated group were obtained on subjective symptom scores for nasal congestion, nasal drainage, and sneezing on isolated days during the treatment period (40%, vs 25% on day 3, 71% vs 60% on day 6, and 100% vs 67% on day 7). Improvement in nasal resistance as measured by rhinomanography was better in the placebo group than in the active group on day 7 (11% vs -6%). Our study demonstrated no beneficial effects of steam inhalation on common cold symptoms.
Adolescent↗