RESUMEN
OBJECTIVE: This study aimed to determine the effect of stepstool use on chest compression (CC) quality during cardiopulmonary resuscitation (CPR) in young children. METHODS: We conducted a prospective observational study of children <8 years of age who received CC for >2 minutes in the emergency department. Data were collected through CC monitor device and video review. Data were analyzed in "CC segments" (periods of CC by individual providers). CC segments were coded "yes" or "no" for stepstool use based on video review. Univariate analyses of CC rate and depth between stepstool use and hand positions were performed through nonparametric testing, stratified by age category. RESULTS: Forty-two patients received 566 minutes of CC. Overall, American Heart Association (AHA)-compliant (rate and depth) CPR was achieved in 10% of CC segments for children <1 year and only 6% in children >1 year. A stepstool was used in 73% of CC segments in children <1 year and 88% in children >1 year. In children >1 year, stepstool use was associated with deeper CCs (P < 0.001) and a more compliant CC rate (P < 0.01). In children >1 year, 7% of those with a stepstool in use achieved AHA compliance, compared to those without a stepstool, where none achieved AHA compliance. CONCLUSIONS: In children >1 year, stepstool use resulted in greater CC depth and more AHA-compliant CC rate. No CC segments in children >1 year achieved AHA compliance without a stepstool. These data support uniform stepstool use during pediatric CPR in children >1 year of age.
RESUMEN
Three novel bismuth-organic compounds, with the general formula [Bi2(HPDC)2(PDC)2]·(arene)·2H2O (H2PDC = 2,6-pyridinedicarboxylic acid; arene = pyrene, naphthalene, and azulene), that consist of neutral dinuclear Bi-pyridinedicarboxylate complexes and outer coordination sphere arene molecules were synthesized and structurally characterized. The structures of all three phases exhibit strong π-π stacking interactions between the Bi-bound PDC/HPDC and outer sphere organic molecules; these interactions effectively sandwich the arene molecules between bismuth complexes and thereby prevent molecular vibrations. Upon UV irradiation, the compounds containing pyrene and naphthalene displayed red and green emission, respectively, with quantum yields of 1.3(2) and 30.8(4)%. The emission was found to originate from the T1 â S0 transition of the corresponding arene and result in phosphorescence characteristic of the arene employed. By comparison, the azulene-containing compound displayed very weak blue-purple phosphorescence of unknown origin and is a rare example of T2 â S0 emission from azulene. The pyrene- and naphthalene-containing compounds both display radioluminescence, with intensities of 11 and 38% relative to bismuth germanate, respectively. Collectively, these results provide further insights into the structure-property relationships that underpin luminescence from Bi-based materials and highlight the utility of Bi-organic molecules in the realization of organic emission.
RESUMEN
A new bismuth-organic compound containing 1,10-phenanthroline (phen) and 2,5-pyridinedicarboxylic acid (PDC) was synthesized and structurally characterized by single-crystal X-ray diffraction. The structure consists of 2-D {Bi(phen)(HPDC)(PDC)}n sheets wherein the PDC ligands bridge metal centers via three unique bonding modes. The 2-D sheets are further connected through strong hydrogen-bonding interactions to form a 3-D supramolecular network. The parent compound displayed yellow photoluminescence in the solid state at room temperature. Doping studies were undertaken to incorporate Eu3+ into the structure, statistically replacing Bi3+ in small quantities (1, 5, and 10 mol % Eu3+ relative to Bi3+). All three compounds displayed characteristic Eu3+ emission, with total quantum yields as high as 16.0% and sensitization efficiencies between 0.21 and 0.37 depending on the Eu3+ doping percentage.
