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Sokolovski D, Uranga A, Akhmatskaya E. A macroscopic clock model to solve the paradox of Schrödinger's cat. Sci Rep 2024; 14:3644. [PMID: 38351198 PMCID: PMC10864309 DOI: 10.1038/s41598-024-53833-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Accepted: 02/05/2024] [Indexed: 02/16/2024] Open
Abstract
We propose detecting the moment an atom emits a photon by means of a nearly classical macroscopic clock and discuss its viability. It is shown that what happens in such a measurement depends on the relation between the clock's accuracy and the width of the energy range available to the photon. Implications of the analysis for the long standing Schrödinger's cat problem are reported.
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Affiliation(s)
- D Sokolovski
- Departmento de Química-Física, Universidad del País Vasco, UPV/EHU, 48940, Leioa, Spain.
- IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, 48009, Bilbao, Spain.
- EHU Quantum Center, Universidad del País Vasco, UPV/EHU, 48940, Leioa, Spain.
| | - A Uranga
- Basque Center for Applied Mathematics (BCAM), Alameda de Mazarredo 14, 48009, Bilbao, Spain
| | - E Akhmatskaya
- Basque Center for Applied Mathematics (BCAM), Alameda de Mazarredo 14, 48009, Bilbao, Spain
- IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, 48009, Bilbao, Spain
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Bronte O, García-García F, Lee DJ, Urrutia I, Uranga A, Nieves M, Martínez-Minaya J, Quintana JM, Arostegui I, Zalacain R, Ruiz-Iturriaga LA, Serrano L, Menéndez R, Méndez R, Torres A, Cilloniz C, España PP. Impact of outdoor air pollution on severity and mortality in COVID-19 pneumonia. Sci Total Environ 2023; 894:164877. [PMID: 37331396 PMCID: PMC10275649 DOI: 10.1016/j.scitotenv.2023.164877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 05/23/2023] [Accepted: 06/12/2023] [Indexed: 06/20/2023]
Abstract
The relationship between exposure to air pollution and the severity of coronavirus disease 2019 (COVID-19) pneumonia and other outcomes is poorly understood. Beyond age and comorbidity, risk factors for adverse outcomes including death have been poorly studied. The main objective of our study was to examine the relationship between exposure to outdoor air pollution and the risk of death in patients with COVID-19 pneumonia using individual-level data. The secondary objective was to investigate the impact of air pollutants on gas exchange and systemic inflammation in this disease. This cohort study included 1548 patients hospitalised for COVID-19 pneumonia between February and May 2020 in one of four hospitals. Local agencies supplied daily data on environmental air pollutants (PM10, PM2.5, O3, NO2, NO and NOX) and meteorological conditions (temperature and humidity) in the year before hospital admission (from January 2019 to December 2019). Daily exposure to pollution and meteorological conditions by individual postcode of residence was estimated using geospatial Bayesian generalised additive models. The influence of air pollution on pneumonia severity was studied using generalised additive models which included: age, sex, Charlson comorbidity index, hospital, average income, air temperature and humidity, and exposure to each pollutant. Additionally, generalised additive models were generated for exploring the effect of air pollution on C-reactive protein (CRP) level and SpO2/FiO2 at admission. According to our results, both risk of COVID-19 death and CRP level increased significantly with median exposure to PM10, NO2, NO and NOX, while higher exposure to NO2, NO and NOX was associated with lower SpO2/FiO2 ratios. In conclusion, after controlling for socioeconomic, demographic and health-related variables, we found evidence of a significant positive relationship between air pollution and mortality in patients hospitalised for COVID-19 pneumonia. Additionally, inflammation (CRP) and gas exchange (SpO2/FiO2) in these patients were significantly related to exposure to air pollution.
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Affiliation(s)
- O Bronte
- Galdakao-Usansolo University Hospital, Pulmonology Department, Galdakao, Spain; BioCruces Bizkaia Health Research Institute, Baracaldo, Spain.
| | | | - D-J Lee
- Basque Center for Applied Mathematics (BCAM), Bilbao, Spain
| | - I Urrutia
- Galdakao-Usansolo University Hospital, Pulmonology Department, Galdakao, Spain; BioCruces Bizkaia Health Research Institute, Baracaldo, Spain
| | - A Uranga
- Galdakao-Usansolo University Hospital, Pulmonology Department, Galdakao, Spain; BioCruces Bizkaia Health Research Institute, Baracaldo, Spain
| | - M Nieves
- Galdakao-Usansolo University Hospital, Pulmonology Department, Galdakao, Spain; BioCruces Bizkaia Health Research Institute, Baracaldo, Spain
| | | | - J M Quintana
- Galdakao-Usansolo University Hospital, Research Unit, Galdakao, Spain
| | - I Arostegui
- University of the Basque Country (UPV/EHU), Department of Applied Mathematics, Statistics and Operative Research, Leioa, Spain; Basque Center for Applied Mathematics (BCAM), Bilbao, Spain
| | - R Zalacain
- Cruces University Hospital, Pulmonology Department, Baracaldo, Spain; BioCruces Bizkaia Health Research Institute, Baracaldo, Spain
| | - L A Ruiz-Iturriaga
- Cruces University Hospital, Pulmonology Department, Baracaldo, Spain; BioCruces Bizkaia Health Research Institute, Baracaldo, Spain
| | - L Serrano
- Cruces University Hospital, Pulmonology Department, Baracaldo, Spain; BioCruces Bizkaia Health Research Institute, Baracaldo, Spain
| | - R Menéndez
- Hospital Universitari i Politècnic La Fe de Valencia, Pulmonology Department, Valencia, Spain
| | - R Méndez
- Hospital Universitari i Politècnic La Fe de Valencia, Pulmonology Department, Valencia, Spain
| | - A Torres
- Hospital Clínic i Provincial de Barcelona, Pulmonology Department, University of Barcelona, Barcelona, Spain
| | - C Cilloniz
- Hospital Clínic i Provincial de Barcelona, Pulmonology Department, University of Barcelona, Barcelona, Spain; Faculty of Health Sciences, Continental University, Huancayo, Peru
| | - P P España
- Galdakao-Usansolo University Hospital, Pulmonology Department, Galdakao, Spain; BioCruces Bizkaia Health Research Institute, Baracaldo, Spain
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Uranga A, Villanueva A, Lafuente I, González N, Legarreta MJ, Aguirre U, España PP, Quintana JM, García-Gutiérrez S. [Risk factors for clinical deterioration in patients admitted for COVID-19: A case-control study]. Rev Clin Esp 2022; 222:22-30. [PMID: 34054133 PMCID: PMC8141782 DOI: 10.1016/j.rce.2021.04.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 04/25/2021] [Indexed: 01/08/2023]
Abstract
INTRODUCTION There is controversy regarding the best predictors of clinical deterioration in COVID-19. OBJECTIVE This work aims to identify predictors of risk factors for deterioration in patients hospitalized due to COVID-19. METHODS DESIGN Nested case-control study within a cohort. Setting: 13 acute care centers of the Osakidetza-Basque Health Service. Participants: Patients hospitalized for COVID-19 with clinical deterioration-defined as onset of severe ARDS, ICU admission, or death-were considered cases. Two controls were matched to each case based on age. Sociodemographic data; comorbidities; baseline treatment; symptoms; date of onset; previous consultations; and clinical, analytical, and radiological variables were collected. An explanatory model of clinical deterioration was created by means of conditional logistic regression. RESULTS A total of 99 cases and 198 controls were included. According to the logistic regression analysis, the independent variables associated with clinical deterioration were: emergency department O2 saturation ≤90% (OR 16.6; 95%CI 4-68), pathological chest X-ray (OR 5.6; 95%CI 1.7-18.4), CRP >100 mg/dL (OR 3.62; 95%CI 1.62-8), thrombocytopenia with < 150,000 platelets (OR 4; 95%CI 1.84-8.6); and a medical history of acute myocardial infarction (OR 15.7; 95%CI, 3.29-75.09), COPD (OR 3.05; 95%CI 1.43-6.5), or HT (OR 2.21; 95%CI 1.11-4.4). The model's AUC was 0.86. On the univariate analysis, female sex and presence of dry cough and sore throat were associated with better clinical progress, but were not found to be significant on the multivariate analysis. CONCLUSION The variables identified could be useful in clinical practice for the detection of patients at high risk of poor outcomes.
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Affiliation(s)
- A Uranga
- Servicio de Respiratorio, Hospital Galdakao-Usansolo, Galdakao, Bizkaia, España
| | - A Villanueva
- Unidad de Investigación Hospital Galdakao-Usansolo, Galdakao, Bizkaia, España
| | - I Lafuente
- Unidad de Investigación Hospital Galdakao-Usansolo, Galdakao, Bizkaia, España
| | - N González
- Unidad de Investigación Hospital Galdakao-Usansolo, Galdakao, Bizkaia, España
- Red de Investigación en Servicios Sanitarios en Enfermedades Crónicas (REDISSEC), Galdakao, Bizkaia, España
| | - M J Legarreta
- Unidad de Investigación Hospital Galdakao-Usansolo, Galdakao, Bizkaia, España
| | - U Aguirre
- Unidad de Investigación Hospital Galdakao-Usansolo, Galdakao, Bizkaia, España
- Red de Investigación en Servicios Sanitarios en Enfermedades Crónicas (REDISSEC), Galdakao, Bizkaia, España
| | - P P España
- Servicio de Respiratorio, Hospital Galdakao-Usansolo, Galdakao, Bizkaia, España
| | - J M Quintana
- Unidad de Investigación Hospital Galdakao-Usansolo, Galdakao, Bizkaia, España
- Red de Investigación en Servicios Sanitarios en Enfermedades Crónicas (REDISSEC), Galdakao, Bizkaia, España
| | - S García-Gutiérrez
- Unidad de Investigación Hospital Galdakao-Usansolo, Galdakao, Bizkaia, España
- Red de Investigación en Servicios Sanitarios en Enfermedades Crónicas (REDISSEC), Galdakao, Bizkaia, España
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Uranga A, Villanueva A, Lafuente I, González N, Legarreta MJ, Aguirre U, España PP, Quintana JM, García-Gutiérrez S. Risk factors for clinical deterioration in patients admitted for COVID-19: A case-control study. Rev Clin Esp 2022; 222:22-30. [PMID: 34556435 PMCID: PMC8426292 DOI: 10.1016/j.rceng.2021.04.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 04/25/2021] [Indexed: 01/08/2023]
Abstract
INTRODUCTION There is controversy regarding the best predictors of clinical deterioration in COVID-19. OBJECTIVE This work aims to identify predictors of risk factors for deterioration in patients hospitalized due to COVID-19. METHODS DESIGN Nested case-control study within a cohort. SETTING 13 acute care centers of the Osakidetza-Basque Health Service. PARTICIPANTS patients hospitalized for COVID-19 with clinical deterioration-defined as onset of severe ARDS, ICU admission, or death-were considered cases. Two controls were matched to each case based on age. Sociodemographic data; comorbidities; baseline treatment; symptoms; date of onset; previous consultations; and clinical, analytical, and radiological variables were collected. An explanatory model of clinical deterioration was created by means of conditional logistic regression. RESULTS A total of 99 cases and 198 controls were included. According to the logistic regression analysis, the independent variables associated with clinical deterioration were: emergency department O2 saturation ≤90% (OR 16.6; 95%CI 4-68), pathological chest X-ray (OR 5.6; 95%CI 1.7-18.4), CRP > 100 mg/dL (OR 3.62; 95%CI 1.62-8), thrombocytopenia with <150,000 platelets (OR 4; 95%CI 1.84-8.6); and a medical history of acute myocardial infarction (OR 15.7; 95%CI, 3.29-75.09), COPD (OR 3.05; 95%CI 1.43-6.5), or HT (OR 2.21; 95%CI 1.11-4.4). The model's AUC was 0.86. On the univariate analysis, female sex and presence of dry cough and sore throat were associated with better clinical progress, but were not found to be significant on the multivariate analysis. CONCLUSION The variables identified could be useful in clinical practice for the detection of patients at high risk of poor outcomes.
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Affiliation(s)
- A Uranga
- Servicio de Respiratorio, Hospital Galdakao-Usansolo, Galdakao, Bizkaia, Spain
| | - A Villanueva
- Unidad de Investigación Hospital Galdakao-Usansolo, Galdakao, Bizkaia, Spain
| | - I Lafuente
- Unidad de Investigación Hospital Galdakao-Usansolo, Galdakao, Bizkaia, Spain
| | - N González
- Unidad de Investigación Hospital Galdakao-Usansolo, Galdakao, Bizkaia, Spain; Red de Investigación en Servicios Sanitarios en Enfermedades Crónicas (REDISSEC), Galdakao, Bizkaia, Spain
| | - M J Legarreta
- Unidad de Investigación Hospital Galdakao-Usansolo, Galdakao, Bizkaia, Spain
| | - U Aguirre
- Unidad de Investigación Hospital Galdakao-Usansolo, Galdakao, Bizkaia, Spain; Red de Investigación en Servicios Sanitarios en Enfermedades Crónicas (REDISSEC), Galdakao, Bizkaia, Spain
| | - P P España
- Servicio de Respiratorio, Hospital Galdakao-Usansolo, Galdakao, Bizkaia, Spain
| | - J M Quintana
- Unidad de Investigación Hospital Galdakao-Usansolo, Galdakao, Bizkaia, Spain; Red de Investigación en Servicios Sanitarios en Enfermedades Crónicas (REDISSEC), Galdakao, Bizkaia, Spain
| | - S García-Gutiérrez
- Unidad de Investigación Hospital Galdakao-Usansolo, Galdakao, Bizkaia, Spain; Red de Investigación en Servicios Sanitarios en Enfermedades Crónicas (REDISSEC), Galdakao, Bizkaia, Spain.
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Furundarena JR, Uranga A, Sainz MR, González C, Uresandi N, Argoitia N, Araiz M. Usefulness of the lymphocyte positional parameters in the Sysmex XN haematology analyser in lymphoproliferative disorders and mononucleosis syndrome. Int J Lab Hematol 2017; 40:41-48. [PMID: 28868635 DOI: 10.1111/ijlh.12726] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 07/15/2017] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The lymphocyte positional parameters included in Sysmex XN have been suggested as useful means to differentiate lymphoproliferative disorders (LPD), mononucleosis syndrome (MNS) and other lymphocytoses. METHODS We evaluated Sysmex XN analysers, which supply 6 lymphocyte positional parameters that can be measured in the WDF scattergram: LY-X, LY-Y, LY-Z, LY-WX, LY-WY and LY-WZ. RESULTS We collected 301 samples from normal controls, polyclonal lymphocytosis, MNS and LPD. MNS and monoclonal expansion of T granular lymphocyte (T-GL) diagnostic groups accumulated higher numbers of significant differences in the mean values in comparison with the other groups. We propose a new algorithm that can differentiate T-GL cases from other diagnostic groups with an SE of 67.5%, an SP of 98.2%, a PPV of 87.1% and an NPV of 94.3%. Another algorithm showed its efficiency to differentiate MNS cases from other diagnostic groups with an SE of 63.6%, an SP of 97.5%, a PPV of 70.0% and an NPV of 96.7%. In 38.5% of all cases, the analyser did not generate any morphologic flag. Abnormal results in lymphocyte positional parameters were useful to detect 72.5% of these samples. CONCLUSION The lymphocyte positional parameters provided by Sysmex XN analysers are useful to differentiate expansions of T-GLs from other LPD and to differentiate MNS cases from other diagnostic groups. In addition, these parameters are very useful for detecting changes in the lymphocytes that make it necessary to review blood smears in samples without morphological flagging.
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Affiliation(s)
- J R Furundarena
- Hematology Laboratory, Donostia Unibertsitate Ospitalea, Donostia, Spain
| | - A Uranga
- Hematology Laboratory, Donostia Unibertsitate Ospitalea, Donostia, Spain
| | - M R Sainz
- Hematology Laboratory, Donostia Unibertsitate Ospitalea, Donostia, Spain
| | - C González
- Hematology Laboratory, Donostia Unibertsitate Ospitalea, Donostia, Spain
| | - N Uresandi
- Hematology Laboratory, Donostia Unibertsitate Ospitalea, Donostia, Spain
| | - N Argoitia
- Hematology Laboratory, Donostia Unibertsitate Ospitalea, Donostia, Spain
| | - M Araiz
- Hematology Laboratory, Donostia Unibertsitate Ospitalea, Donostia, Spain
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Furundarena JR, Sainz M, Uranga A, Cuevas L, Lopez I, Zubicaray J, Bizjak A, Robado N, Araiz M. Comparison of abnormal cell flagging of the hematology analyzers Sysmex XN and Sysmex XE-5000 in oncohematologic patients. Int J Lab Hematol 2016; 39:58-67. [DOI: 10.1111/ijlh.12575] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2016] [Accepted: 07/29/2016] [Indexed: 10/20/2022]
Affiliation(s)
- J. R. Furundarena
- Department of Hematology; Donostia University Hospital; Donostia Spain
| | - M. Sainz
- Department of Hematology; Donostia University Hospital; Donostia Spain
| | - A. Uranga
- Department of Hematology; Donostia University Hospital; Donostia Spain
| | - L. Cuevas
- Department of Hematology; Donostia University Hospital; Donostia Spain
| | - I. Lopez
- Department of Hematology; Donostia University Hospital; Donostia Spain
| | - J. Zubicaray
- Department of Hematology; Donostia University Hospital; Donostia Spain
| | - A. Bizjak
- Department of Hematology; Donostia University Hospital; Donostia Spain
| | - N. Robado
- Department of Hematology; Donostia University Hospital; Donostia Spain
| | - M. Araiz
- Department of Hematology; Donostia University Hospital; Donostia Spain
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Ruiz LA, Zalacain R, Capelastegui A, Bilbao A, Gomez A, Uranga A, Espana PP. Bacteremic Pneumococcal Pneumonia in Elderly and Very Elderly Patients: Host- and Pathogen-Related Factors, Process of Care, and Outcome. J Gerontol A Biol Sci Med Sci 2014; 69:1018-24. [DOI: 10.1093/gerona/glt288] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Verd J, Sansa M, Uranga A, Perez-Murano F, Segura J, Barniol N. Metal microelectromechanical oscillator exhibiting ultra-high water vapor resolution. Lab Chip 2011; 11:2670-2672. [PMID: 21748145 DOI: 10.1039/c1lc20103d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Water vapor sensing characterization of a metal resonator fabricated with an industrial 0.35 μm CMOS technology is reported. The resonator frequency is ∼13.2 MHz and exhibits a sensitivity magnitude of ∼3.5 kHz per %RH without requiring any additional hygroscopic coating layer. An on-chip integrated oscillator circuit enables an unprecedented resolution of 0.005 %RH.
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Affiliation(s)
- J Verd
- Department of Physics, Universitat de les Illes Balears, Palma (Illes Balears), 07122, Spain.
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Lopez J, Verd J, Uranga A, Murillo G, Giner J, Marigó E, Torres F, Abadal G, Barniol N. VHF band-pass filter based on a single CMOS-MEMS doubleended tuning fork resonator. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.proche.2009.07.282] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lopez J, Verd J, Marigó E, Uranga A, Murillo G, Giner J, Torres F, Abadal G, Barniol N. Monolithically Integrated Double-Ended Tuning Fork- Based Oscillator with Low Bias Voltage in Air Conditions. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.proche.2009.07.153] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Abstract
The development and in vivo test of a fully integrated differential CMOS amplifier, implemented with standard 0.7-microm CMOS technology (one poly, two metals, self aligned twin-well CMOS process) intended to record extracellular neural signals is described. In order to minimize the flicker noise generated by the CMOS circuitry, a chopper technique has been chosen. The fabricated amplifier has a gain of 74 dB, a bandwidth of 3 kHz, an input noise of 6.6 nV/(Hz)0.5, a power dissipation of 1.3 mW, and the active area is 2.7 mm2. An ac coupling has been used to adapt the electrode to the amplifier circuitry for the in vivo testing. Compound muscle action potentials, motor unit action potentials, and compound nerve action potentials have been recorded in acute experiments with rats, in order to validate the amplifier.
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Affiliation(s)
- A Uranga
- Electronic Engineering Department, Universitat Autónoma de Barcelona, 08193-Bellaterra, Spain.
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Uranga A, Barniol N, Marín D, Villa R, Aguiló J. An Integrated Implantable Electrical Sacral Root Stimulator for Bladder Control. Neuromodulation 2003; 5:238-47. [DOI: 10.1046/j.1525-1403.2002.02034.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Morales VH, Milone J, Etchegoyen O, Bordone J, Uranga A. [Umbilical cord hematopoietic progenitor cells bank]. Medicina (B Aires) 2001; 61:843-8. [PMID: 11808425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023] Open
Abstract
Transplantation of hematopoietic progenitor cells (HPC) from bone marrow and mobilized peripheral blood is a standard therapy in malignant and non malignant diseases. The lack of suitable donors is an important limitation. The discovery that umbilical cord blood (CB) contains high numbers of HPC that can be used as an alternative source for allogeneic stem cell transplantation led ITMO to establish BANCEL, the first Argentine and Latinoamerican experience of its kind. The blood remaining in the umbilical cord and in the placenta was requested from women who were in the last quarter of pregnancy. An informed consent together with a medical record focused on family disease was completed. Out of 65 donations, 55 (85%) were collected and 51 (78%) were cryopreserved. Mean collected volume was 110 ml with 68% (75 ml) reduction and mean cryopreservation of 35 ml; ABO and Rh blood group systems were determined, HLA, class I, A and B loci, and class II, DR locus were typed by molecular biology methods using PCR-SSOP. Infectious disease screening was carried out for brucellosis, syphilis, Chagas, hepatitis B and C, HIV I and II, HTLV I and II, toxoplasmosis and cytomegalovirus. Two positive units for hepatitis B (anticore) and two positive units for Chagas were discarded. The quantity of total nucleated cells (TNC), CD34+ cells and the clonogenic capacity were determined twice at the collection and after the procedures of volume reduction previous to cryopreservation. A 5% reduction in both TNC and CD34 cells and a 10% in the colony forming units (CFU) were detected. A good correlation coefficient between TNC and CFU was obtained.
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Affiliation(s)
- V H Morales
- ITMO, Instituto de Trasplante de Medula Osea, Hospital Italiano, La Plata, Argentina.
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Abstract
The aim of this study was to compare, in vitro, the ability of temporary versus permanent materials to seal the access cavity. Eighty human maxillary single-canal teeth were prepared biomechanically and obturated with gutta-percha and an endodontic cement AH Plus, using the warm vertical compaction technique. All access cavities were sealed with 1 of 4 materials (Cavit, Fermit, Tetric, or Dyract). Microleakage was assessed by methylene blue dye penetration. The teeth were submitted to 100 thermocycles, with temperature varying from 0 degree to 55 degrees C. The greatest degree of leakage was observed with the temporary materials (Cavit and Fermit). There was a significant difference (p < 0.05) in leakage between all materials except between Dyract and Tetric. This suggests that it may be more prudent to use a permanent restorative material for provisional restorations to prevent inadequate canal sealing and the resulting risk of fluid penetration.
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Affiliation(s)
- A Uranga
- Faculty of Medicine and Odontology, University of Basque Country, Lejona, Spain
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Muro Bidaurre I, Pablo Sanz Jaka J, Antonio Rekarte J, Hernáez I, Uranga A. [Urachal cyst]. ARCH ESP UROL 1998; 51:726-8. [PMID: 9807903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
OBJECTIVE To describe an additional case of urachal cyst. METHODS/RESULTS Herein we describe a patient with urachal cyst. The clinical and therapeutic aspects are discussed. CONCLUSION The urachal cyst is an uncommon disease entity whose treatment is by surgery.
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Affiliation(s)
- I Muro Bidaurre
- Servicio de Urología, Hospital de Guipuzcoa, San Sebastián, Guipúzcoa, España
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