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Baffoni L, Frisoni M, Maccaferri M, Ferri S. Systemic lupus erythematosus and eosinophilic fasciitis: an unusual association. Clin Rheumatol 1995; 14:591-2. [PMID: 8549105 DOI: 10.1007/bf02208164] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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52
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Palareti G, Maccaferri M, Poggi M, Legnani C, Chirivi L, Frascaro M, Coccheri S. Comparison of five methods for fibrinogen measurement in various clinical conditions. Thromb Res 1992. [DOI: 10.1016/0049-3848(92)90519-g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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53
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Maccaferri M, Legnani C, Preda L, Palareti G. Protein S activity in patients with heredofamilial protein S deficiency and in patients with juvenile venous thrombosis. Results of a functional method. Thromb Res 1991; 64:647-58. [PMID: 1839200 DOI: 10.1016/0049-3848(91)90065-5] [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: 12/29/2022]
Abstract
Using an ACL 300R coagulometer (Instrumentation Laboratory) we assessed the clinical usefulness of a new method to measure PS activity (PS:Act), based on the prolongation of prothrombin time of a mixture of diluted plasma sample, PS depleted plasma previously incubated with Protac for protein C activation, bovine thromboplastin and calcium ions. The results were compared with those from immunological assays. PS:Act was measured in 42 apparently healthy subjects, in 12 patients with hereditary PS deficiency (HPSD group) diagnosed on the basis of immunologic tests and in 48 patients with episodes of juvenile venous thromboembolism at least three months prior to testing (JVTE group). All the HPSD patients had PS:Act below the normal range (less than 62%). In JVTE group 9 patients (18.7%) showed abnormal results for PS:Act, 4 (8.3%) had low levels of free PS:Ag; all patients had normal total PS:Ag levels. Levels of antiphospholipid antibodies (immunologic test) were normal in the 9 JVTE patients with low PS:Act. When all the results were considered together (n = 102), the correlation coefficient between PS:Act and free PS:Ag was 0.78 (p less than 0.01).
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Palareti G, Maccaferri M, Manotti C, Tripodi A, Chantarangkul V, Rodeghiero F, Ruggeri M, Mannucci PM. Fibrinogen assays: a collaborative study of six different methods. C.I.S.M.E.L. Comitato Italiano per la Standardizzazione dei Metodi in Ematologia e Laboratorio. Clin Chem 1991; 37:714-9. [PMID: 2032326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
This collaborative study, organized by the Hemostasis Subcommittee of C.I.S.M.E.L., evaluated the accuracy, precision, and comparability of the following six widely used fibrinogen assays: total clottable fibrinogen (Blombäck and Blombäck), clotting time (Von Clauss), turbidimetry (Ellis and Stransky), Chromotime System, prothrombin time (PT)-derived, and radial immunodiffusion (RID). The same frozen samples, with normal and high contents of fibrinogen, were examined in four laboratories. The methods were calibrated with an internal standard whose fibrinogen content was determined gravimetrically. Both the Von Clauss and the RID methods were reliable, accurate, and precise, if adequate calibration was used. The PT-derived method was highly reproducible, but had some problems with accuracy. We demonstrate that an adequate calibration procedure is indispensable for reliable fibrinogen measurements whatever method is used. Because neither the calibration procedures proposed by the manufacturers nor the use of lyophilized commercial plasmas is adequate for this purpose, we urge that an international standard for fibrinogen measurement be promptly established.
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Palareti G, Maccaferri M, Manotti C, Tripodi A, Chantarangkul V, Rodeghiero F, Ruggeri M, Mannucci PM. Fibrinogen assays: a collaborative study of six different methods. C.I.S.M.E.L. Comitato Italiano per la Standardizzazione dei Metodi in Ematologia e Laboratorio. Clin Chem 1991. [DOI: 10.1093/clinchem/37.5.714] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
This collaborative study, organized by the Hemostasis Subcommittee of C.I.S.M.E.L., evaluated the accuracy, precision, and comparability of the following six widely used fibrinogen assays: total clottable fibrinogen (Blombäck and Blombäck), clotting time (Von Clauss), turbidimetry (Ellis and Stransky), Chromotime System, prothrombin time (PT)-derived, and radial immunodiffusion (RID). The same frozen samples, with normal and high contents of fibrinogen, were examined in four laboratories. The methods were calibrated with an internal standard whose fibrinogen content was determined gravimetrically. Both the Von Clauss and the RID methods were reliable, accurate, and precise, if adequate calibration was used. The PT-derived method was highly reproducible, but had some problems with accuracy. We demonstrate that an adequate calibration procedure is indispensable for reliable fibrinogen measurements whatever method is used. Because neither the calibration procedures proposed by the manufacturers nor the use of lyophilized commercial plasmas is adequate for this purpose, we urge that an international standard for fibrinogen measurement be promptly established.
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56
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Palareti G, Legnani C, Maccaferri M, Gozzetti G, Mazziotti A, Martinelli G, Zanello M, Sama C, Coccheri S. Coagulation and fibrinolysis in orthotopic liver transplantation: role of the recipient's disease and use of antithrombin III concentrates. S. Orsola Working Group on Liver Transplantation. HAEMOSTASIS 1991; 21:68-76. [PMID: 1959800 DOI: 10.1159/000216206] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
In this study we report the data obtained from extensive haemostatic testing of 25 patients undergoing orthotopic liver transplantation and the results of an open randomized pilot trial of antithrombin III concentrate administration during surgery. Marked differences in transfusional needs and in pre- and intraoperative blood coagulation and fibrinolytic changes were observed between recipients with liver cirrhosis and those with primary biliary cirrhosis. In the former, the increases in tissue-type plasminogen activator activity, total euglobulin fibrinolytic activity, and fibrin-derived degradation products occurred earlier and were more marked, as were the signs of increased thrombin formation. Supplementation of antithrombin III concentrate during surgery failed to induce significant changes in the main parameters studied and in the transfusional needs.
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Legnani C, Maccaferri M, Palareti G, Ludovici S, Guazzaloca G, Marabini A, Orlandi C, Coccheri S. Perioperative prophylaxis with a low molecular weight heparin reduces late PAI-1 levels after gynaecological surgery. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/0268-9499(90)90022-c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Legnani C, Maccaferri M, Palareti G, Coccheri S. New quantitative enzyme immunoassays for degradation products of fibrin and fibrinogen in plasma: A comparison with other laboratory methods. ACTA ACUST UNITED AC 1990. [DOI: 10.1016/s0268-9499(05)80052-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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59
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Palareti G, Maccaferri M. Specific assays of hemostasis proteins: fibrinogen. LA RICERCA IN CLINICA E IN LABORATORIO 1990; 20:167-76. [PMID: 2196664 DOI: 10.1007/bf02877563] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Fibrinogen levels are considered a useful indicator in several pathological conditions and recent epidemiological studies have indicated a relationship between fibrinogen levels and increased risk of cardiovascular disease. An accurate measurement of this protein is therefore recommended and the Italian Committee for Standardization of Methods in Hematology and Laboratory has carried out a collaborative study to determine accuracy, precision and comparability of results obtained by six different methods, i.e., 1. Blombäck and Blombäck method, 2. clotting assay according to von Clauss, 3. radial immunodiffusion according to Mancini et al., 4. total amount of clottable fibrinogen by means of turbidimetric assay according to Ellis and Stransky, and 5. with ChromotimeSystem, 6. prothrombin time (PT)-derived fibrinogen assay on ACL coagulometer. The most accurate resulted the von Clauss method, but only if calibrated with an internal standard; in fact, when the manufacturer's tables are used, the method proved to be highly inaccurate. The best precision, both intra- and between-laboratory, was obtained by the PT-derived test on ACL. On the basis of this still incomplete evaluation of the CISMEL study data, we can conclude that: i. some methods used in clinical laboratories give accurate results only after adequate calibration; ii. a reference standard pool may be a valid tool for calibration and for a better between-laboratory comparability; iii. a predilution of the samples with high fibrinogen levels seems indicated; iv. automation markedly increases the precision of methods.
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Palareti G, Legnani C, Ludovici S, Maccaferri M. [Preliminary study for the evaluation of the feasibility of a multicenter clinical trial for the evaluation of the therapeutic efficacy of an antithrombin III concentration (Immuno) in the intravascular coagulation syndrome]. Haematologica 1990; 75 Suppl 2:21-32. [PMID: 2201605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
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61
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Palareti G, Legnani C, Bianchini B, Guazzaloca G, Maccaferri M, Marabini A, De Iaco P, Marcozzi S, Mancini L, Orlandi C. Pharmacodynamic effects on blood coagulation of a new low molecular weight heparin (alfa-LMWH) in healthy volunteers and gynecological surgery patients. INT ANGIOL 1989; 8:47-52. [PMID: 2768958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The pharmacodynamic properties of a new LMWH (alfa-LMWH) were investigated in 8 healthy volunteers after single subcutaneous administrations of 7,500, 15,000 and 30,000 anti-XaU doses at weekly intervals. Anti-Xa and anti-IIa heparin activities were monitored together with aPTT, thrombin time, bleeding time and euglobulin lysis time. No relevant changes in bleeding time or major side-effects were ever recorded. A group of 26 patients submitted to gynaecological surgery were then investigated to determine the dosage schedule for prophylaxis of post-operative deep vein thrombosis. Two subgroups received daily subcutaneous doses of 7,500 and 15,000 anti-XaU alfa-LMWH respectively, beginning 2 h before surgery; the third subgroup received 5,000 IU calcium heparin three times daily over the seven postoperative days. The following tests were peri-operatively monitored: anti-Xa heparin activity, aPTT, PT, fibrinogen, Antithrombin III. No differences in intra-operative bleeding or side-effects were recorded. On the basis of the levels of anti-Xa heparin activity and the negligible effects on aPTT, the dose of 7500 anti-XaU was selected at single daily administration for thromboprophylaxis in gynecological surgery.
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Legnani C, Maccaferri M, Tonini P, Cassio A, Cacciari E, Coccheri S. Reduced fibrinolytic response in obese children: Association with high baseline activity of the fast acting plasminogen activator inhibitor (PAI-1). ACTA ACUST UNITED AC 1988. [DOI: 10.1016/0268-9499(88)90015-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Righetti B, Magnanini E, Maccaferri M. ETHYLENE AND OTHER VOLATILE SUBSTANCES PRODUCED BY IN VITRO CULTURED PRUNUS AVIUM°. ACTA ACUST UNITED AC 1988. [DOI: 10.17660/actahortic.1988.227.74] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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64
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Legnani C, Maccaferri M, Guazzaloca G, Poggi M, Palareti G, Coccheri S. 286 t-PA antigen and other fibrinolytic parameters after 10 min. venous occlusion in young healthy subjects. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/0268-9499(88)90633-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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65
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De Rosa V, Legnani C, Maccaferri M, Rodorigo G, Coccheri S. 35 Acute effects of dermatan sulfate on fibrinolysis in healthy volunteers. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/0268-9499(88)90382-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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66
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Palareti G, Legnani C, De Rosa V, Fortunato G, Grauso F, Maccaferri M, Poggi M, Bellusci R, Franceschelli N, Coccheri S. 394 Hyperfibrinolysis and during DIC orthotopic liver transplantation (OLT). An indication for intraoperative at III concentrates. ACTA ACUST UNITED AC 1988. [DOI: 10.1016/0268-9499(88)90741-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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67
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Caudarella R, Stefani F, Malavolta N, Rizzoli E, Maccaferri M, D'Antuono G. [Allopurinol in the therapy of idiopathic calcic lithiasis]. GIORNALE DI CLINICA MEDICA 1983; 64:198-208. [PMID: 6618055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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68
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Caudarella R, Malavolta N, Maccaferri M, Raffi GB, Boari C. [Evaluation of various renal function indices in a group of workers in the shoe industry]. Minerva Med 1981; 72:1361-6. [PMID: 7231787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The possible chronic nephrotoxicity of solvents has been investigated in a group of workers in the footwear industry. A number of indices of renal function were assessed in all subjects and a qualitative study of proteinuria carried out. The noted reduction in VFG would appear to be proportional to exposure doses. The other parameters, particularly the electrolytic balance, do not lend themselves to pathogenetic interpretations. The existence of a chronic nephrotoxicity of solvents cannot, however, be excluded.
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