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Sanclemente G, Mancilla GA, Hernandez G. A double-blind randomized controlled trial to assess the efficacy of daylight photodynamic therapy with methyl-aminolevulinate vs. Placebo and daylight in patients with facial photodamage. ACTAS DERMO-SIFILIOGRAFICAS 2015; 107:224-34. [PMID: 26643786 DOI: 10.1016/j.ad.2015.10.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Revised: 10/02/2015] [Accepted: 10/12/2015] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND Daylight PDT (dPDT) is easy to use and does not require light equipment. Such therapy has been exhaustively proved to be successful in the treatment of actinic keratosis, but its use in skin photodamage remains unclear. OBJECTIVE To evaluate dPDT's efficacy in skin facial photodamage. PATIENTS AND METHODS This was a parallel-group double-blind, randomized placebo-controlled trial. Sixty participants with symmetric facial photodamage were allocated to topical methyl aminolevulinate (MAL) and daylight vs. matching placebo and daylight. Primary outcome was global photodamage improvement/failure 1 month after the third session. Secondary outcomes included: pain evaluation; specific photodamage severity scores; sun irradiance quantification and Skindex-29 scores. Adverse events were also investigated. RESULTS Primary analysis included all randomized patients. All patients sun-exposed for 120min in 3 sessions. The risk of failure was lower in the MAL-dPDT group than in the placebo plus daylight group (RR: 0.18; 95% CI: 0.08-0.41). Mean solar irradiance (W/m(2)) during the first, second and third sessions was 480.82, 430.07 and 435.84, respectively. Items 5 and 14 of Skindex-29 in the MAL-dPDT group showed statistical significant differences. Two patients in the MAL-dPDT group had serious and non-serious events not directly related to the product. CONCLUSION dPDT with MAL was un-painful, effective and safe for the treatment of facial photodamage. Herpes simplex prophylaxis should be considered before sessions.
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Hernandez G, Vaquero C, Gonzalez P, Colinas L, Garcia S, Canabal A, Villasclaras A, Cuena R, Fernandez R. High flow conditioned oxygen therapy for prevention of reintubation in critically ill patients at high risk for extubation failure: a multicenter randomised controlled trial. Intensive Care Med Exp 2015. [PMCID: PMC4798147 DOI: 10.1186/2197-425x-3-s1-a823] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Fernandez R, Subira C, Frutos F, Rialp G, Laborda C, Masclans JR, Hernandez G. High-flow oxygen therapy for extubation failure prevention in high-risk critically ill patients: a randomized multicenter trial. Intensive Care Med Exp 2015. [PMCID: PMC4796881 DOI: 10.1186/2197-425x-3-s1-a164] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
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Ospina-Tascón GA, Bautista DF, Umaña M, Bermúdez WF, Valencia JD, Madriñan HJ, Bruhn A, Hernandez G, Granados M, Arango-Dávila CA, De Backer D. 0032. Relationship between microcirculatory alterations and venous-to-arterial carbon dioxide differences in patients with septic shock. Intensive Care Med Exp 2014. [PMCID: PMC4797149 DOI: 10.1186/2197-425x-2-s1-o5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Tapia P, Soto D, Bruhn A, Regueira T, Jarufe N, Alegria L, Bachler JP, Leon F, Vicuña C, Luengo C, Ospina-Tascón G, Bakker J, Hernandez G. 0101. Early and severe impairment of lactate clearance in endotoxic shock is not related to liver hypoperfusion: preliminary report. Intensive Care Med Exp 2014. [PMCID: PMC4796976 DOI: 10.1186/2197-425x-2-s1-p12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Malbrain MLNG, Chiumello D, Cesana BM, Reintam Blaser A, Starkopf J, Sugrue M, Pelosi P, Severgnini P, Hernandez G, Brienza N, Kirkpatrick AW, Schachtrupp A, Kempchen J, Estenssoro E, Vidal MG, De Laet I, De Keulenaer BL. A systematic review and individual patient data meta-analysis on intra-abdominal hypertension in critically ill patients: the wake-up project. World initiative on Abdominal Hypertension Epidemiology, a Unifying Project (WAKE-Up!). Minerva Anestesiol 2014; 80:293-306. [PMID: 24603146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Intra-abdominal hypertension (IAH), defined as a pathologically increase in intraabdominal pressure, is commonly found in critically ill patients. While IAH has been associated with several abdominal as well as extra-abdominal conditions, few studies have examined the occurrence of IAH in relation to mortality. The aim of this paper was to evaluate the prognostic role of IAH and its risk factors at admission in critically ill patients across a wide range of settings and countries. An individual patient meta-analysis of all available data and a systematic review of published (in full or as abstract) medical databases and studies between 1996 and June 2012 were performed. The search was limited to "clinical trials" and "randomized controlled trials", "adults", using the terms "intra-abdominal pressure", "intraabdominal hypertension" combined with any of the terms "outcome" and "mortality". All together data on 2707 patients, representing 21 centers from 11 countries was obtained. Data on 1038 patients were not analysed because of the following exclusion criteria: no IAP value on admission (N.=712), absence of information on ICU outcome (N.=195), age <18 or >95 years (N.=131). Data from 1669 individual patients (19 centers from 9 countries) were analyzed in the meta-analysis. Presence of IAH was defined as a sustained increase in IAP equal to or above 12 mmHg. At admission the mean overall IAP was 9.9±5.0 mmHg, with 463 patients (27.7%) presenting IAH with a mean IAP of 16.3±3.4 mmHg. The only independent predictors for IAH were SOFA score and fluid balance on the day of admission. Five hundred thirteen patients (30.8%) died in intensive care. The independent predictors for intensive care mortality were IAH, SAPS II score, SOFA score and admission category. This systematic review and individual patient data meta-analysis shows that IAH is frequently present in critically ill patients and it is an independent predictor for mortality.
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Malbrain ML, Chiumello D, Cesana BM, Reintam Blaser A, Starkopf J, Sugrue M, Pelosi P, Severgnini P, Hernandez G, Brienza N, Kirkpatrick AW, Schachtrupp A, Kempchen J, Estenssoro E, Vidal MG, De Laet I, De Keulenaer BL. A Systematic Review And Individual Patient Data Meta-Analysis On Intraabdominal Hypertension In Critically Ill Patients: The Wake-Up Project World Initiative on Abdominal Hypertension Epidemiology, a Unifying Project (WAKE-Up!). Minerva Anestesiol 2013:R02Y9999N00A0807. [PMID: 24336093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Background: Intraabdominal hypertension (IAH), defined as a pathologically increase in intraabdominal pressure, is commonly found in critically ill patients. While IAH has been associated with several abdominal as well as extra-abdominal conditions, few studies have examined the occurrence of IAH in relation to mortality. Objective: To evaluate the prognostic role of IAH and its risk factors at admission in critically ill patients across a wide range of settings and countries. Data sources: An individual patient meta-analysis of all available data and a systematic review of published (in full or as abstract) medical databases and studies between 1996 and June 2012 were performed. The search was limited to "clinical trials" and "randomized controlled trials", "adults", using the terms "intraabdominal pressure", "intraabdominal hypertension" combined with any of the terms "outcome" and "mortality". All together data on 2707 patients, representing 21 centers from 11 countries was obtained. Data on 1038 patients were not analysed because of the following exclusion criteria: no IAP value on admission (n=712), absence of information on ICU outcome (n=195), age <18 or > 95 years (n=131). Results: Data from 1669 individual patients (19 centers from 9 countries) were analyzed in the meta-analysis. Presence of IAH was defined as a sustained increase in IAP equal to or above 12 mmHg. At admission the mean overall IAP was 9.9±5.0 mmHg, with 463 patients (27.7%) presenting IAH with a mean IAP of 16.3±3.4 mmHg. The only independent predictors for IAH were SOFA score and fluid balance on the day of admission. Five hundred thirteen patients (30.8%) died in intensive care. The independent predictors for intensive care mortality were IAH, SAPS II score, SOFA score and admission category. Conclusions: This systematic review and individual patient data meta-analysis shows that IAH is frequently present in critically ill patients and it is an independent predictor for mortality.
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Nakagawa J, Juárez J, Nakatsuji K, Akiyama T, Hernandez G, Macal R, Flores C, Ortiz M, Marroquín L, Bamba T, Wakai S. Geographical characterization of the triatomine infestations in north–central Guatemala. ANNALS OF TROPICAL MEDICINE AND PARASITOLOGY 2013; 99:307-15. [PMID: 15829138 DOI: 10.1179/136485905x29684] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In an entomological study in 2002, the degree of domestic and peridomestic infestation with triatomine bugs and the geographical distribution of such infestations were investigated in north-central Guatemala. The survey team searched for triatomines in houses constructed with mud walls or thatched roofs, in villages suspected of being infested. The level of infestation observed was lower than that seen in the same area and in eastern Guatemala, in a preliminary survey, 3 years earlier. Most of the infestations detected were of Triatoma dimidiata but even this species was found in <7% of the houses investigated. Infestations with Rhodnius prolixus or other potential vectors of Trypanosoma cruzi were much rarer. The generally low levels of infestation make the elimination of R. prolixus and the reduction of the domestic population of Tri. dimidiata feasible in the study area. The southern part of the study area had higher levels of domestic infestation and colonization than the north, and peridomestic infestation was highest in the south-west. Given such geographical variation in the pattern of infestation, it would seem wise to stratify the study region into areas of high, moderate and low-risk of human-triatomine contact, so that appropriate vector-control strategies can be targeted at the worst-affected areas. Regular entomological surveillance, ideally with community participation, is recommended. Analysis of the relationship between the geographical patterns of infestation and factors such as vegetation, altitude and vector migration would be useful.
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Laroche G, Vallade J, Bazinette R, van Nijnatten P, Hernandez E, Hernandez G, Massines F. Fourier transform infrared absorption spectroscopy characterization of gaseous atmospheric pressure plasmas with 2 mm spatial resolution. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2012; 83:103508. [PMID: 23126767 DOI: 10.1063/1.4761925] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This paper describes an optical setup built to record Fourier transform infrared (FTIR) absorption spectra in an atmospheric pressure plasma with a spatial resolution of 2 mm. The overall system consisted of three basic parts: (1) optical components located within the FTIR sample compartment, making it possible to define the size of the infrared beam (2 mm × 2 mm over a path length of 50 mm) imaged at the site of the plasma by (2) an optical interface positioned between the spectrometer and the plasma reactor. Once through the plasma region, (3) a retro-reflector module, located behind the plasma reactor, redirected the infrared beam coincident to the incident path up to a 45° beamsplitter to reflect the beam toward a narrow-band mercury-cadmium-telluride detector. The antireflective plasma-coating experiments performed with ammonia and silane demonstrated that it was possible to quantify 42 and 2 ppm of these species in argon, respectively. In the case of ammonia, this was approximately three times less than this gas concentration typically used in plasma coating experiments while the silane limit of quantification was 35 times lower. Moreover, 70% of the incoming infrared radiation was focused within a 2 mm width at the site of the plasma, in reasonable agreement with the expected spatial resolution. The possibility of reaching this spatial resolution thus enabled us to measure the gaseous precursor consumption as a function of their residence time in the plasma.
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Williams DJ, Hernandez G, Lyons LR. Simultaneous observations of the proton ring current and stable auroral red arcs. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja081i004p00608] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hernandez G. Mid-latitude thermospheric neutral kinetic temperatures, 1. Solar, geomagnetic, and long-term effects. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja087ia03p01623] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hernandez G, Roble RG. Direct measurements of nighttime thermospheric winds and temperatures, 3. Monthly variations during solar minimum. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja082i035p05505] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Hernandez G, Roble RG. Direct measurements of nighttime thermospheric winds and temperatures, 1. Seasonal variations during geomagnetic quiet periods. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja081i013p02065] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hernandez G, Roble RG. Direct measurements of nighttime thermospheric winds and temperatures, 2. Geomagnetic storms. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja081i028p05173] [Citation(s) in RCA: 90] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Hernandez G. Lower-thermosphere temperatures determined from the line profiles of the O I 17,924-K (5577 Å) emission in the night sky, 1. Long-term behavior. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja081i028p05165] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hernandez G, Roble RG. On determining the major SAR arc properties from a few measurable parameters. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja079i007p01057] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hernandez G. Determination of the quenching of O(¹D) by molecular nitrogen using the Ionospheric Modification Experiment. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/ja077i019p03625] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hernandez G, Regueira T, Bruhn A, Mcnab P, Veas E, Pedreros C, Fuentealba A, Kattan E, Bugedo G, Rovegno M, Castro R, Ince C. Peripheral perfusion is correlated to metabolic perfusion parameters and microvascular reactivity but not with hepatosplanchnic or microcirculatory flow parameters in hyperdynamic septic shock. Crit Care 2012. [PMCID: PMC3363623 DOI: 10.1186/cc10812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Otsuka T, Suzuki M, Yoshikawa H, Hashimoto G, Ishida T, Osaki T, Itou N, Ono T, Yamamoto M, Sugi K, Zaidi A, Gati S, Sheikh N, Ghani S, Howes R, Sharma R, Sharma S, Esposito R, Schiano Lomoriello V, Santoro A, Raia R, Ippolito R, De Palma D, Galderisi M, Merino Sierra B, Bijnens B, Pare C, Azqueta M, Vidal B, Hernandez G, Yanguas X, Mont L, Brugada J, Sitges M, Mykland J, Skjorten I, Humerfelt S, Hansteen V, Melsom M, Hisdal J, Steine K, Elnoamany MF, Dawood A, Khalil T, Elhabeeby M, Smith B, Grapsa J, Dawson D, Coulter T, Rendon A, Gorissen W, Nihoyannopoulos P, Satendra M, Sargento L, Sousa C, Lousada N, Palma Reis R, Gual Capllonch F, Teis A, Lopez Ayerbe J, Ferrer E, Vallejo N, Gomez Denia E, Bayes Genis A, Landolff Q, Vallet C, Dominique S, Viacroze C, Kurtz B, Eltchaninoff H, Bauer F. Moderated Poster Sessions 3: Right ventricle in normal conditions and under pressure * Friday 9 December 2011, 08:30-12:30 * Location: Moderated Poster Area. EUROPEAN JOURNAL OF ECHOCARDIOGRAPHY 2011. [DOI: 10.1093/ejechocard/jer213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Dujovny M, Slavin KV, Hernandez G, Geremia GK, Ausman JI. Use of cerebral oximetry to monitor brain oxygenation reserves for skull base surgery. Skull Base Surg 2011; 4:117-21. [PMID: 17171159 PMCID: PMC1661792 DOI: 10.1055/s-2008-1058961] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
We used cerebral oximetry based on near-infrared re-emittance spectroscopy for noninvasive evaluation of the cerebral regional oxygen saturation (rSO(2)) to preoperatively assess patients with skull base tumors and giant arterial aneurysms, for whom possible occlusion or partial resection of the internal carotid artery was considered. Monitoring cerebral oxygen saturation was performed during both endovascular (balloon) and open surgical test occlusions of the internal carotid artery. The presence (or absence) of changes in the cerebral oxygen saturation served as a criterion of the patient's tolerance to permanent occlusion of the internal carotid artery. In all cases the curves of saturation accurately corresponded to the clinical condition of the patients, primarily to the developing of neurological signs. Cerebral oximetry was an extremely informative and reliable technique for fast, easy, and noninvasive detection of changes in brain blood circulation. Generally, cerebral oximetry serves as a valuable adjunct in detection of brain tolerance to the occlusion of major arterial vessels and in monitoring the condition of the brain in regard to its oxygenation and perfusion.
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Sabido M, Lahuerta M, Hernandez G, Montoliu A, Gonzalez V, Giardina F, Monzon JE, Pedroza MI, Casabona J, Guevara R. P1-S2.06 HIV, sexually transmitted infections, and risk behaviours among clients of sex workers in Guatemala - are they a bridge in HIV transmission? Br J Vener Dis 2011. [DOI: 10.1136/sextrans-2011-050108.63] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Hernandez G, McCarthy MP. Long-term instrumental parameter investigation of a Fabry-Perot spectrometer at an isolated field station. APPLIED OPTICS 2011; 50:1951-1957. [PMID: 21532679 DOI: 10.1364/ao.50.001951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
To insure that long-term determinations of Doppler width and shift--derived from observations of atmospheric emissions--are internally consistent and reliable, we have developed a method to both continuously and nonintrusively determine and monitor the instrumental constants of the Fabry-Perot spectrometer making the observations. We have used this method at our isolated field experiment at South Pole, Antarctica, because the instrument is only accessible to us for a few days every year. Here we report both the method and the Fabry-Perot stability results for the past 22 years of operation. The method involves the description of real Fabry-Perot instrumental constants as a small departure from those of an ideal Fabry-Perot. In general, this model is applicable for most observations. However, experimentally, there are times when the small-departure model is not applicable, thus indicating how to best reduce the observations into physical quantities for the utmost consistency in the geophysical results.
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Lahuerta M, Sabido M, Giardina F, Hernandez G, Palacios JF, Ortiz R, Fernandez VH, Casabona J. Comparison of users of an HIV/syphilis screening community-based mobile van and traditional voluntary counselling and testing sites in Guatemala. Sex Transm Infect 2010; 87:136-40. [DOI: 10.1136/sti.2010.043067] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Urtubia A, Emparan M, Roman C, Hernandez G, Roger J. Multivariate Statistic and Pattern Recognition Methods to detect abnormal fermentations in wine process. J Biotechnol 2010. [DOI: 10.1016/j.jbiotec.2010.09.331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Cantor Rizo EA, Cabrera P, Moreno Moreno LA, Godoy JI, Trillos C, Ibañez M, Hernandez G. Relationship between survival and prognostic factors in breast cancer (BC): A single-center experience. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e12062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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