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del Nozal MJ, Toribio L, Bernal JL, Nieto EM, Jiménez JJ. Separation of albendazole sulfoxide enantiomers by chiral supercritical-fluid chromatography. JOURNAL OF BIOCHEMICAL AND BIOPHYSICAL METHODS 2002; 54:339-45. [PMID: 12543509 DOI: 10.1016/s0165-022x(02)00129-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The enantioseparation of albendazole sulfoxide (ABZSO) by chiral supercritical-fluid chromatography (SFC) on two columns, based on the polysaccharide derivatives Chiralpak AD and Chiralcel OD, was studied. The effect of different modifiers, methanol, ethanol, 2-propanol, and acetonitrile, was examined. The results showed that ABZSO can be separated on both columns, using an alcohol-type modifier. Using the Chiralpak AD column, the best results were obtained with 2-propanol and, in the case of the Chiralcel OD, with methanol.
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Jiménez JJ, Nozal MJ, Bernal JL, Santos M, Mayorga AL. Factors affecting the extraction, hydrolysis and derivatization steps for the quantitation of total residues of amitraz in honey by gas chromatography with electron capture detection. Anal Bioanal Chem 2002; 374:300-4. [PMID: 12324853 DOI: 10.1007/s00216-002-1475-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2002] [Revised: 07/03/2002] [Accepted: 07/04/2002] [Indexed: 11/25/2022]
Abstract
A study about the most adequate conditions for the determination of the amitraz total residues in honey by gas chromatography is presented. Solvent and solid phase extraction procedures as well as the influence of several parameters on the extraction, hydrolysis and derivatization steps are considered. Solid phase extraction on ODS cartridges was found to be not reliable for the determination of total residues, because recovery for 2,4-dimethylaniline (DMA) was poor. Liquid-liquid extraction with hexane was accomplished in a single step and was more reproducible. The pH of the aqueous solution had to be set at pH 11 to achieve extraction of DMA. The derivatization of DMA with heptafluorobutyric anhydride (HFBA) was practically instantaneous at room temperature.
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Nozal MJ, Bernal JL, Jiménez JJ, González MJ, Higes M. Extraction of thymol, eucalyptol, menthol, and camphor residues from honey and beeswax. Determination by gas chromatography with flame ionization detection. J Chromatogr A 2002; 954:207-15. [PMID: 12058905 DOI: 10.1016/s0021-9673(02)00153-x] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A gas chromatographic method to determine thymol, eucalyptol (cineole), menthol and camphor residues in honey and beeswax is proposed. To isolate the compounds, three methods involving liquid-liquid extraction with methylene chloride, distillation, or solid-phase extraction on octadecylsilica cartridges can be used. The GC separation is carried out on a 60 m x 0.53 mm Stabilwax DA capillary column, using a flame ionization detector. The method is applied to the analysis of natural honey and also honey and beeswax samples from beehives treated with the above compounds.
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Jiménez JJ, Bernal JL, Toribio L, del Nozal MJ, Martín MT. Capillary gas chromatography with mass spectrometric and atomic emission detection for characterization and monitoring chlordimeform degradation in honey. J Chromatogr A 2002; 946:247-53. [PMID: 11878280 DOI: 10.1016/s0021-9673(01)01588-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Capillary gas chromatography-mass spectrometry and capillary gas chromatography-atomic emission detection have been successfully used to identify and monitor the main degradation products of chlordimeform when this compound is initially present in honey. The analysis of laboratory-spiked honey samples over 28 weeks revealed the occurrence of two degradation products: 4-chloro-o-toluidine (I) and N-formyl-4-chloro-o-toluidine (III). During this period the concentration of chlordimeform decreased to 7.5% of its initial value; the concentration of compound I increased gradually whereas compound III was present in a larger proportion and reached a maximum around the 14th week.
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Mariani L, Bernier N, Jiménez JJ, Decaëns T. [Diet of an anecic earthworm from the Colombian savannas: questioning ecological groups]. COMPTES RENDUS DE L'ACADEMIE DES SCIENCES. SERIE III, SCIENCES DE LA VIE 2001; 324:733-42. [PMID: 11510419 DOI: 10.1016/s0764-4469(01)01351-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
An ecological classification based on a set of morphological characters may be used to describe earthworm functions in soil. However these relationships have been seldom verified. Gizzards of the earthworm Martiodrilus carimaguensis (Glossoscolecidae) were studied to find out if its anecic morphology was in agreement with its diet (shallow litter remains and deep organo-mineral material). By direct observation of 13 adults' gizzard contents with a dissecting and a phase contrast microscope, the volumetric percentage of plant fragments, roots, amorphous organic matter and mineral particles reached respectively 63, 5, 6.5 and 30% v/v. Eighty percent of plant fragments were microscopic, and mostly incorporated into the organo-mineral earthworm casts well preserved in the gizzard. Coprophagy and rhizophagy were the dominant feature of M. carimaguensis diet. Yet, the casts produced revealed a high variability in its diet, what could be related to transitional adoption of a typical anecic diet during some periods.
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Sierra B, Serrano N, Larrañaga P, Plasencia EJ, Inza I, Jiménez JJ, Revuelta P, Mora ML. Using Bayesian networks in the construction of a bi-level multi-classifier. A case study using intensive care unit patients data. Artif Intell Med 2001; 22:233-48. [PMID: 11377149 DOI: 10.1016/s0933-3657(00)00111-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Combining the predictions of a set of classifiers has shown to be an effective way to create composite classifiers that are more accurate than any of the component classifiers. There are many methods for combining the predictions given by component classifiers. We introduce a new method that combine a number of component classifiers using a Bayesian network as a classifier system given the component classifiers predictions. Component classifiers are standard machine learning classification algorithms, and the Bayesian network structure is learned using a genetic algorithm that searches for the structure that maximises the classification accuracy given the predictions of the component classifiers. Experimental results have been obtained on a datafile of cases containing information about ICU patients at Canary Islands University Hospital. The accuracy obtained using the presented new approach statistically improve those obtained using standard machine learning methods.
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Toribio L, Bernal JL, del Nozal MJ, Jiménez JJ, Nieto EM. Applications of the Chiralpak AD and Chiralcel OD chiral columns in the enantiomeric separation of several dioxolane compounds by supercritical fluid chromatography. J Chromatogr A 2001; 921:305-13. [PMID: 11471814 DOI: 10.1016/s0021-9673(01)00844-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Two chiral columns based on polysaccharide derivatives (Chiralpak AD and Chiralcel OD) have been tested for the chiral separation of several dioxolane compounds, using supercritical fluid chromatography. The compounds studied included ketoconazole and some of its precursors. The effect of the different modifiers and the pressure, on the chromatographic parameters was also evaluated. In general, the alcohol modifiers provided better results than acetonitrile, and all the compounds could be separated with these two columns, but the selection of the column depends on the kind of compound.
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Jiménez JJ, Bernal JL, del Nozal MJ, Toribio L, Mayorga AL. Use of deactivated fused-silica capillary precolumns in pesticide analysis by gas chromatography with electron-capture detection. J Chromatogr A 2001; 919:373-9. [PMID: 11442044 DOI: 10.1016/s0021-9673(01)00819-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
The advantages and disadvantages of coupling a retention gap of fused-silica between the injection port and the chromatographic column are discussed. The influence on the peak width and height of several factors such as the solvent (n-hexane, acetone, ethyl acetate and methanol), the gap (length, inner diameter, deactivation mode), the injection volume and the pesticide concentration has been examined. Those factors have very different incidences so, it is not possible to extract a general recommendation about the use of gaps. For this reason, checking its viability in each particular case is more advisable.
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Jiménez JJ, Bernal JL, del Nozal MJ, Toribio L, Arias E. Analysis of pesticide residues in wine by solid-phase extraction and gas chromatography with electron capture and nitrogen-phosphorus detection. J Chromatogr A 2001; 919:147-56. [PMID: 11459301 DOI: 10.1016/s0021-9673(01)00632-x] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
A feasible and reproducible method for multiresidue analysis of several common pesticides, of different polarities, in wine samples is proposed. The method combines a solid-phase extraction on polymeric cartridges eluted with ethyl acetate and a gas chromatographic determination using electron capture and nitrogen-phosphorus detection. To avoid the matrix effect, previous washing of the cartridges with a mixture of water-2-propanol (90:10) and further clean-up of the extract on Florisil cartridges, together with a calibration using spiked extracts, are recommended.
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Nozal MJ, Bernal JL, Toribio L, Jiménez JJ, Martín MT. High-performance liquid chromatographic determination of methyl anthranilate, hydroxymethylfurfural and related compounds in honey. J Chromatogr A 2001; 917:95-103. [PMID: 11403496 DOI: 10.1016/s0021-9673(01)00702-6] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A high-performance liquid chromatographic method for determining 5-hydroxymethyl-2-furaldehyde (hydroxymethylfurfural), 2-furaldehyde (furfural), furan-2-carboxylic acid (2-furoic acid), furan-3-carboxylic acid (3-furoic acid), furan-3-carboxaldehyde (3-furaldehyde) and 2-aminobenzoic acid methyl ester (methyl anthranilate) in honey and honeydew samples is described. To prevent matrix interference and to isolate the compounds, a clean-up step which implies a solid-phase extraction on polymeric cartridges and an elution with 0.5 ml methanol is recommended. The compounds are separated on a reversed-phase column with a gradient of (A) 1% aqueous acetic acid-acetonitrile (97:3, v/v) and (B) acetonitrile-water (50:50, v/v), with UV detection at 250 nm. The method is applied to the analysis of samples from different botanical origin.
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Bernal JL, Jiménez JJ, del Nozal MJ, Higes M, Llorente J. Gas chromatographic determination of acrinathrine and 3-phenoxybenzaldehyde residues in honey. J Chromatogr A 2000; 882:239-43. [PMID: 10895948 DOI: 10.1016/s0021-9673(00)00217-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
A procedure involving an extraction step and further gas chromatographic analysis with flame ionization detection to determine residues of acrinathrine and its main metabolite, 3-phenoxybenzaldehyde, in honey is proposed. Residues can be isolated from the matrix by means of liquid-liquid extraction with a mixture of benzene-isopropanol, by solid-phase extraction with octadecylsilane cartridges or Florisil packed columns, the latter method giving higher recoveries. Assays on spiked honey samples are carried out to test the procedures that are afterwards applied to honey samples from treated beehives.
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Jiménez JJ, Bernal JL, del Nozal MJ, Martín MT. Use of a particle beam interface combined with mass spectrometry/negative chemical ionization to determine polar herbicide residues in soil by liquid chromatography. J AOAC Int 2000; 83:756-61. [PMID: 10868601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
The use of mass spectrometry/negative chemical ionization (MS/NCI), in combination with selected-ion monitoring, allows sensitive and selective determination of polar and thermally unstable herbicide residues by liquid chromatography coupled to a particle beam interface. The method has been applied to the analysis of soil samples for herbicide residues, using various procedures for their extraction and employing matrix-standard calibration to avoid quantitative errors due to transfer of matter through the interface. Data for the fragment ions found in the MS/NCI procedure and chromatograms from analyses of real samples are also presented.
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Bernal JL, Toribio L, del Nozal MJ, Nieto EM, Jiménez JJ. Chiral separation of four 1,3-dioxolane derivatives by supercritical fluid chromatography on an amylose-based column. J Chromatogr A 2000; 871:127-37. [PMID: 10735293 DOI: 10.1016/s0021-9673(99)00856-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The chiral separation of four 1,3-dioxolane derivatives by supercritical fluid chromatography on an amylose-based column is described. The effects of mobile phase composition, temperature and pressure have been investigated. The nature of the modifier is the parameter which has the highest impact on the chiral resolution and it is more important than the polarity of the mobile phase. The organic modifier used for the best enantiomeric separation was different for each compound, because it depends strongly on the molecular structure of the compound.
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Jiménez JJ, Bernal JL, del Nozal MJ, Novo M, Higes M, Llorente J. Determination of rotenone residues in raw honey by solid-phase extraction and high-performance liquid chromatography. J Chromatogr A 2000; 871:67-73. [PMID: 10735287 DOI: 10.1016/s0021-9673(99)01063-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A method for determining residues of the insecticide rotenone in raw-honey by high-performance liquid chromatography (HPLC) is described. To extract the residues, organic solvents such as ethyl acetate, n-hexane/dichloromethane and solid-phase extraction with octadecylsilane cartridges or Florisil packed columns were tested. Determination was carried out by reversed-phase HPLC using acetonitrile-buffer phosphate (pH 7) (60:40, v/v) as mobile phase and detection at 210 nm. Although the data showed that the two extraction methods were able to isolate the pesticide residues, the extraction on octadecylsilane cartridges was preferred due to its simplicity and higher recovery. Recoveries depended strongly on the fortification level for the two extraction procedures. Practical determination limits of 0.015 mg/kg were obtained. In the analysis of honeys, from beehives treated with rotenone at therapeutical doses for 1 month, residual amounts below 0.2 mg/kg were found.
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Nozal MJ, Bernal JL, Toribio L, Jiménez JJ, Martín MT. Validation of the removal of acetylsalicylic acid. Recovery and determination of residues on various surfaces by high performance liquid chromatographic. J Chromatogr A 2000; 870:69-75. [PMID: 10722063 DOI: 10.1016/s0021-9673(99)01134-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The validation of a procedure to clean glass, vinyl and stainless steel surfaces that have been exposed to acetylsalicylic acid during its manufacture is described. The cleaning procedure using two cotton swabs moistened with the mobile phase was validated using a wipe-test and a high-performance liquid chromatography (HPLC) method developed to determine low quantities of the acid. The HPLC method involves an octadecylsilane column at 55 degrees C, a mixture of water-acetonitrile-orthophosphoric acid (779:220:1, v/v) as mobile phase and detection at 226 nm. Recoveries of 86%, 90% and 94% were obtained from vinyl, glass and stainless steel plates respectively. The validation gave acceptable levels of sensitivity, recovery, precision and linearity.
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Serrano N, Jiménez JJ, Brouard MT, Málaga J, Mora ML. Acute adrenal insufficiency after cardiac surgery. Crit Care Med 2000; 28:569-70. [PMID: 10708203 DOI: 10.1097/00003246-200002000-00048] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Adrenal insufficiency after cardiac surgery can easily be confused during the course of an immediate unstable postoperative period. If unrecognized, this condition may cause serious morbidity and can be fatal. We report on a 43-yr-old female patient with chronic known adrenal insufficiency, who, despite her adequate preoperative replacement therapy, presented with one episode of acute hypoadrenal crisis after elective open heart surgery, which could serve as a model to illustrate the salient clinical features and possible problems in this setting for diagnosing this problem to patients in whom chronic adrenal insufficiency remains unknown.
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Serrano N, Jiménez JJ, Prieto F, Mora ML. Ether suicide poisoning by intravenous injection. Intensive Care Med 1999; 25:337-8. [PMID: 10229181 DOI: 10.1007/s001340050851] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Jiménez JJ, Bernal JL, del Nozal MJ, Martín MT, Mayorga AL. Solid-phase microextraction applied to the analysis of pesticide residues in honey using gas chromatography with electron-capture detection. J Chromatogr A 1998; 829:269-77. [PMID: 9923084 DOI: 10.1016/s0021-9673(98)00826-7] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The possibilities of using solid-phase microextraction to determine residues of pesticides in honey have been examined. For this purpose, three types of fiber have been assayed: polyacrylate of 85 microns thickness, and polydimethylsiloxane of 7 and 100 microns thickness. They have been applied to the extraction of 21 pesticides of different chemical families. The effects of the temperature, extraction time and ionic strength on the microextraction have been studied, proposing the most adequate for each fiber. Under optimized conditions, precision, intervals of linearity and detection limits were evaluated.
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Toribio L, del Nozal MJ, Bernal JL, Jiménez JJ, Serna ML. Packed-column supercritical fluid chromatography coupled with solid-phase extraction for the determination of organic microcontaminants in water. J Chromatogr A 1998; 823:163-70. [PMID: 9818402 DOI: 10.1016/s0021-9673(98)00300-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A multiresidue method for the analysis of 35 common contaminants (including pesticides, polycyclic aromatic hydrocarbons and phenols) in lough and river waters from Castilla y León Spanish region, by using supercritical fluid chromatography (SFC) with five silica packed columns, is described. In order to decrease the detection limits, a preconcentration step by coupling solid-phase extraction to the SFC system was used. The different variables affecting the extraction procedure were studied and optimized, selecting the Isolute Env+ as the best sorbent. The detection limits achieved ranged from 0.4 to 2.6 micrograms l-1.
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Jiménez JJ, Bernal JL, del Nozal MJ, Toribio L, Martín MT. Gas chromatography with electron-capture and nitrogen-phosphorus detection in the analysis of pesticides in honey after elution from a Florisil column. Influence of the honey matrix on the quantitative results. J Chromatogr A 1998; 823:381-7. [PMID: 9818415 DOI: 10.1016/s0021-9673(98)00292-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
A modified procedure to extract pesticides from honey samples that involves loading the honey onto a Florisil packed column and subsequently eluting it with an n-hexane-dichloromethane mixture is proposed. Anomalous high gas chromatographic responses and subsequently very high recoveries for the pesticides in the extracts were obtained by a conventional calibration with pesticide solutions in organic solvent. This effect was attributed to the honey matrix and can be circumvented by using spiked honey extracts as calibration standards.
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Bernal JL, del Nozal MJ, Toribio L, Jiménez JJ, Atienza J. High-performance liquid chromatographic determination of benomyl and carbendazim residues in apiarian samples. J Chromatogr A 1997; 787:129-36. [PMID: 9408999 DOI: 10.1016/s0021-9673(97)00633-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Simple procedures for the extraction and chromatographic determination of benomyl and carbendazim in honey, bees wax, larvae, bees and pollen are proposed. The fungicides were extracted from honey, larvae and bees using ethyl acetate, while methanol was more suitable for wax and pollen samples. Pollen extracts need a further clean-up step with n-hexane. The determination is carried out by reversed-phase high-performance liquid chromatography (HPLC) with fluorescence detection. The procedures have been applied to the analysis of benomyl on honey and larvae samples from hives whose bees were nourished with artificial food mixed with benomyl.
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Bernal JL, del Nozal MJ, Rivera JM, Jiménez JJ, Atienza J. Determination of the fungicide vinclozolin in honey and bee larvae by solid-phase and solvent extraction with gas chromatography and electron-capture and mass spectrometric detection. J Chromatogr A 1996; 754:507-13. [PMID: 8997742 DOI: 10.1016/s0021-9673(96)00249-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Methods for the determination of residual vinclozolin in honey and bee larvae are proposed. The fungicide can be extracted with an n-hexane-acetone (70:30, v/v) mixture, or by passage through ODS cartridges which requires no subsequent clean-up. Vinclozolin is quantified by capillary gas chromatography with electron-capture and mass spectrometric detection. Recoveries from spiked samples exceed 90%, with a relative standard deviation of 3.5-4.5%.
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48
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Jiménez JJ, Bernal JL, Atienza J. CGC/AED and CGC/ECD/NPD comparison for the determination of acaricides in honey after hexane/acetone extraction. Chromatographia 1996. [DOI: 10.1007/bf02269641] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Navarro JF, Mora C, Marcén R, Teruel JL, Gámez C, Jiménez JJ, Orofino L, Ortuño J. Acute cardiovascular effects of intravenous cyclosporine. Int Urol Nephrol 1996; 28:575-81. [PMID: 9119648 DOI: 10.1007/bf02550970] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The acute effects of intravenous (i.v.) cyclosporine A (CsA) on blood pressure and other haemodynamic parameters were examined in 8 patients with end-stage renal disease on haemodialysis (HD). The study was performed after the mid-week haemodialysis session, when the patients were on their dry body weight. Each patient received an i.v. infusion of 5 mg/kg of CsA in 120 ml of 5% dextrose in water during 2 hours. Heart rate, systolic and diastolic blood pressure (SBP, DBP) were monitored by the Holter system. An echocardiogram (M-mode 2-dimensional and Doppler sonography) was performed using an automatic device (Ultramark 6) before CsA administration, at 30, 60 and 120 minutes during CsA infusion, and at 30 minutes thereafter. SBP, DBP and calculated peripheral vascular resistance (CPVR) increased significantly in respect to basal values at 120 and 150 minutes (SBP: basal 130 +/- 21, 120 min: 136 +/- 20, 150 min: 140 +/- 18, p < 0.05 and p < 0.01, respectively. DBP: basal 80 +/- 9, 120 min: 86 +/- 13, 150 min: 88 +/- 13, p < 0.05 and p < 0.01, respectively. CPVR: basal 1000 +/- 228, 120 min: 1178 +/- 305, 150 min: 1236 +/- 270 dyne/s/cm5, p < 0.01). However, systolic volume (SV) and cardiac output (CO) showed significant decreases from the basal values (SV: basal 103 +/- 29, 120 min: 85 +/- 22, 150 min: 85 +/- 17, p < 0.05. CO: basal 8.2 +/- 2, 120 min: 7.3 +/- 1.1, 150 min: 7 +/- 1.2 l/min, p < 0.05). In conclusion, CsA infusion produces a significant elevation of blood pressure, which seems to be mediated by a direct action on peripheral vascular resistance.
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Jiménez JJ, Atienza J, Bernal JL. HPLC with Fluorescence Detection for the Study of Benomyl Dissipation on Treated Lettuces. ACTA ACUST UNITED AC 1994. [DOI: 10.1080/10826079408016169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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