1
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Broussard LJ, Barrow JL, DeBeer-Schmitt L, Dennis T, Fitzsimmons MR, Frost MJ, Gilbert CE, Gonzalez FM, Heilbronn L, Iverson EB, Johnston A, Kamyshkov Y, Kline M, Lewiz P, Matteson C, Ternullo J, Varriano L, Vavra S. Experimental Search for Neutron to Mirror Neutron Oscillations as an Explanation of the Neutron Lifetime Anomaly. Phys Rev Lett 2022; 128:212503. [PMID: 35687456 DOI: 10.1103/physrevlett.128.212503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 03/25/2022] [Accepted: 05/04/2022] [Indexed: 06/15/2023]
Abstract
An unexplained >4σ discrepancy persists between "beam" and "bottle" measurements of the neutron lifetime. A new model proposed that conversions of neutrons n into mirror neutrons n^{'}, part of a dark mirror sector, can increase the apparent neutron lifetime by 1% via a small mass splitting Δm between n and n^{'} inside the 4.6 T magnetic field of the National Institute of Standards and Technology Beam Lifetime experiment. A search for neutron conversions in a 6.6 T magnetic field was performed at the Spallation Neutron Source which excludes this explanation for the neutron lifetime discrepancy.
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Affiliation(s)
- L J Broussard
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - J L Barrow
- Department of Physics, University of Tennessee, Knoxville, Tennessee 37996, USA
| | | | - T Dennis
- Department of Physics and Astronomy, East Tennessee State University, Johnson City, Tennessee 37614, USA
| | - M R Fitzsimmons
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - M J Frost
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - C E Gilbert
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - F M Gonzalez
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - L Heilbronn
- Department of Nuclear Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - E B Iverson
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - A Johnston
- Department of Physics, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Y Kamyshkov
- Department of Physics, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - M Kline
- Department of Physics, The Ohio State University, Columbus, Ohio 43210, USA
| | - P Lewiz
- Department of Physics, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - C Matteson
- Department of Physics, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - J Ternullo
- Department of Physics, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - L Varriano
- Department of Physics, University of Chicago, Chicago, Illinois 60637, USA
| | - S Vavra
- Department of Physics, University of Tennessee, Knoxville, Tennessee 37996, USA
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2
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Buero A, Chimondeguy DJ, Auvieux R, Tchercansky AN, Pankl LG, Lyons GA, Gonzalez FM, Leon Cejas L, Reisin R, Méndez J. [Outcomes of surgical treatment for thymic epithelial neoplasms]. Medicina (B Aires) 2022; 82:376-382. [PMID: 35639058] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023] Open
Abstract
Thymic epithelial tumors are a group of rare neoplasms of the mediastinum. When resectable, complete resection is considered the gold standard for any stage. The primary endpoint was to evaluate overall survival and disease-free survival of patients with thymus epithelial tumors who underwent surgical treatment. The secondary endpoint was to evaluate and compare the overall survival according to: resection type (complete vs. incomplete), Masaoka-Koga stage and tumor histology according to WHO classification. This is a descriptive observational study from January 2004 to December 2020, in which 42 patients with a postoperative histopathological diagnosis of thymic epithelial tumours were included. Thirty-nine were thymomas (92.9%) and 3 were thymic carcinomas (7.1%). In all patients a total thymectomy was performed. The median follow-up was 63.5 months (IQR 32-97.5). The estimated overall survival at five and ten years was 87% (95% CI, 0.69-0.95) and 78% (95% CI, 0.5-0.92), respectively. Estimated diseasefree survival at five and ten years was 90% (95% CI, 0.74-0.96). Patients who underwent complete resection and with early Masaoka-Koga stages had superior overall survival compared to incomplete resections and advanced Masaoka-Koga stages (p = 0.0097 and p = 0.0028, respectively). We found no differences in terms of survival between histological subtypes due to a low number of patients in the thymic carcinoma group.
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Affiliation(s)
- Agustín Buero
- Servicio de Cirugía Torácica, Hospital Británico, Buenos Aires, Argentina. E-mail:
| | | | - Rodolfo Auvieux
- Servicio de Cirugía Torácica, Hospital Británico, Buenos Aires, Argentina
| | | | - Leonardo G Pankl
- Servicio de Cirugía Torácica, Hospital Británico, Buenos Aires, Argentina
| | - Gustavo A Lyons
- Servicio de Cirugía Torácica, Hospital Británico, Buenos Aires, Argentina
| | - Fabio M Gonzalez
- Servicio de Neurología, Hospital Británico, Buenos Aires, Argentina
| | | | - Ricardo Reisin
- Servicio de Neurología, Hospital Británico, Buenos Aires, Argentina
| | - Julián Méndez
- Servicio de Patología, Hospital Británico, Buenos Aires, Argentina
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3
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Gonzalez FM, Fries EM, Cude-Woods C, Bailey T, Blatnik M, Broussard LJ, Callahan NB, Choi JH, Clayton SM, Currie SA, Dawid M, Dees EB, Filippone BW, Fox W, Geltenbort P, George E, Hayen L, Hickerson KP, Hoffbauer MA, Hoffman K, Holley AT, Ito TM, Komives A, Liu CY, Makela M, Morris CL, Musedinovic R, O'Shaughnessy C, Pattie RW, Ramsey J, Salvat DJ, Saunders A, Sharapov EI, Slutsky S, Su V, Sun X, Swank C, Tang Z, Uhrich W, Vanderwerp J, Walstrom P, Wang Z, Wei W, Young AR. Improved Neutron Lifetime Measurement with UCNτ. Phys Rev Lett 2021; 127:162501. [PMID: 34723594 DOI: 10.1103/physrevlett.127.162501] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 07/20/2021] [Indexed: 06/13/2023]
Abstract
We report an improved measurement of the free neutron lifetime τ_{n} using the UCNτ apparatus at the Los Alamos Neutron Science Center. We count a total of approximately 38×10^{6} surviving ultracold neutrons (UCNs) after storing in UCNτ's magnetogravitational trap over two data acquisition campaigns in 2017 and 2018. We extract τ_{n} from three blinded, independent analyses by both pairing long and short storage time runs to find a set of replicate τ_{n} measurements and by performing a global likelihood fit to all data while self-consistently incorporating the β-decay lifetime. Both techniques achieve consistent results and find a value τ_{n}=877.75±0.28_{stat}+0.22/-0.16_{syst} s. With this sensitivity, neutron lifetime experiments now directly address the impact of recent refinements in our understanding of the standard model for neutron decay.
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Affiliation(s)
- F M Gonzalez
- Department of Physics, Indiana University, Bloomington, Indiana 47405, USA
- Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47405, USA
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - E M Fries
- Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA
| | - C Cude-Woods
- Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA
- Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
| | - T Bailey
- Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA
- Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
| | - M Blatnik
- Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA
| | - L J Broussard
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - N B Callahan
- Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - J H Choi
- Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA
- Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
| | - S M Clayton
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - S A Currie
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - M Dawid
- Department of Physics, Indiana University, Bloomington, Indiana 47405, USA
- Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47405, USA
| | - E B Dees
- Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA
- Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
| | - B W Filippone
- Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA
| | - W Fox
- Department of Physics, Indiana University, Bloomington, Indiana 47405, USA
- Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47405, USA
| | - P Geltenbort
- Institut Laue-Langevin, CS 20156, 38042 Grenoble Cedex 9, France
| | - E George
- Tennessee Technological University, Cookeville, Tennessee 38505, USA
| | - L Hayen
- Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA
- Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
| | - K P Hickerson
- Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA
| | - M A Hoffbauer
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - K Hoffman
- Tennessee Technological University, Cookeville, Tennessee 38505, USA
| | - A T Holley
- Tennessee Technological University, Cookeville, Tennessee 38505, USA
| | - T M Ito
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - A Komives
- DePauw University, Greencastle, Indiana 46135, USA
| | - C-Y Liu
- Department of Physics, Indiana University, Bloomington, Indiana 47405, USA
- Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47405, USA
| | - M Makela
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - C L Morris
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - R Musedinovic
- Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA
- Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
| | - C O'Shaughnessy
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - R W Pattie
- East Tennessee State University, Johnson City, Tennessee 37614, USA
| | - J Ramsey
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - D J Salvat
- Department of Physics, Indiana University, Bloomington, Indiana 47405, USA
- Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47405, USA
| | - A Saunders
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - E I Sharapov
- Joint Institute for Nuclear Research, 141980 Dubna, Russia
| | - S Slutsky
- Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA
| | - V Su
- Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA
| | - X Sun
- Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA
| | - C Swank
- Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA
| | - Z Tang
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - W Uhrich
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - J Vanderwerp
- Department of Physics, Indiana University, Bloomington, Indiana 47405, USA
- Center for Exploration of Energy and Matter, Indiana University, Bloomington, Indiana 47405, USA
| | - P Walstrom
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - Z Wang
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - W Wei
- Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA
| | - A R Young
- Department of Physics, North Carolina State University, Raleigh, North Carolina 27695, USA
- Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708, USA
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4
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Gil J, Rodríguez JM, Gil E, Balsalobre MD, Hernández Q, Gonzalez FM, García JA, Torregrosa N, Tortosa JA, Diallo AB, Parrilla P. Surgical treatment of endemic goiter in a nonhospital setting without general anesthesia in Africa. World J Surg 2014; 38:2212-6. [PMID: 24728536 DOI: 10.1007/s00268-014-2553-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Endemic goiter remains a serious public health problem and 75 % of people affected live in underdeveloped countries where treatment is difficult for various reasons. The aim of this article is to report our experience in African countries with the management and surgical treatment of endemic goiter, performed in a nonhospital setting and without general anesthesia in the context of a collaborative development project by experienced endocrine surgeons. METHODS Fifty-six black African patients with a goiter were studied. Those in poor general health, the elderly, patients with either small goiters or clinical hyperthyroidism, and those presenting with an acute episode of malaria were excluded from the study. Cervical epidural anesthesia with spontaneous ventilation was used and a partial thyroidectomy was performed. The technique used, its immediate complications, and early and late follow-up were analyzed. RESULTS Surgery was performed on 31 patients with grades 3 and 4 goiter without mortality and a morbidity rate of 11.9 %, with 97 % of all complications being minor. There were no instances of dysphonia or symptomatic hypocalcemia and the mean stay was 1.57 days (range 1.25-1.93). Follow-up in the first year was 71 % and no case of severe or recurrent hypothyroidism was detected. CONCLUSIONS Surgery without general anesthesia performed in a nonhospital setting in underdeveloped countries in patients with goiter is a viable option with good results and low morbidity.
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Affiliation(s)
- J Gil
- Surgery Department, Endocrine and GI Units, Hospital Universitario Virgen de la Arrixaca, Murcia, Spain,
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5
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Vargas JA, Alvarez-Mon M, Manzano L, Albillos A, Fernández-Corugedo A, Gea-Banacloche JC, Gonzalez FM, Durántez A. Natural killer cell activity in patients with pernicious anemia. Dig Dis Sci 1995; 40:1538-41. [PMID: 7628280 DOI: 10.1007/bf02285205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Patients with pernicious anemia have an estimated risk of gastric adenocarcinoma that ranges from three- to fivefold greater than that of the general population. It has been reported that NK cells may be involved in immunosurveillance against tumor spread. The natural killer cell activity of peripheral blood mononuclear cells was analyzed in 22 patients with pernicious anemia and in 19 healthy controls. Levels of natural killer cell activity against K-562 target cells were similar in control subjects and patients, regardless of gastrin levels and time elapsed since diagnosis. According to quantitative flow cytometry analysis, similar percentages of phenotypically defined NK cells (CD16+) were found in peripheral blood mononuclear cells from patients and healthy controls. Our results show that in pernicious anemia patients, the percentage of NK cells present in peripheral blood mononuclear cells and their lytic activity are normal.
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Affiliation(s)
- J A Vargas
- Service of Internal Medicine I, Clínica Puerta de Hierro, Universidad Autónoma, Madrid, Spain
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6
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Levy PJ, Gonzalez FM, Rush DS, Haynes JL. Hypercoagulable states as an evolving risk for spontaneous venous and arterial thrombosis. J Am Coll Surg 1994; 178:266-70. [PMID: 8149019] [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: 01/29/2023]
Abstract
This study of 49 patients with spontaneous venous and arterial thrombosis identified 27 with hypercoagulable states: 13 had only venous thrombosis (VT), six had episodes of VT followed by arterial thrombosis (AT) and eight had AT only. All 27 patients were less than 42 years of age; 22 had specific natural anticoagulant or fibrinolytic deficiencies: antithrombin III (nine patients), protein C (eight patients), protein S (three patients), heparin cofactor II (two patients), tissue plasminogen activator release (one patient) and mixed antithrombin III and protein S (one patient). The remaining five patients had recurrent thrombotic events associated with resistance to heparin anticoagulation, but no established laboratory diagnosis. Clotting complications included recurrent VT, pulmonary embolism, multiple failed arterial procedures and lower extremity amputation. The remaining 22 patients (mean age of 53 years, range of 46 to 63 years), 12 with VT and ten with AT, did not have laboratory evidence of hypercoagulability and none had recurrent vascular occlusions. All these patients were successfully treated by conventional therapy without any additional thrombotic events during the follow-up period. Young adults with spontaneous thrombotic events should be screened for possible hypercoagulable states. Additionally, these young patients need further evaluation and treatment of cardiovascular risk factors. Those with premature atherosclerosis have an especially poor prognosis despite surgical intervention and anticoagulant therapy.
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Affiliation(s)
- P J Levy
- Department of Surgery, University of South Carolina School of Medicine, Columbia
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7
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Pearce CJ, Gonzalez FM, Wallin JD. Renal failure and hyperkalemia associated with ketorolac tromethamine. Arch Intern Med 1993; 153:1000-2. [PMID: 8481061] [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] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Three patients who were treated with ketorolac tromethamine (Toradol), an injectable nonsteroidal anti-inflammatory drug for pain management, developed acute renal failure or hyperkalemia or both. These complications were reversible in two cases after discontinuing the drug. Clinical conditions preexisted in each patient that rendered them susceptible to the renal complications of nonsteroidal anti-inflammatory use. It is well known that caution should be observed while using nonsteroidal anti-inflammatory drugs in patients whose renal function may be preserved through prostaglandin-mediated vasodilatory effects. The same cautions apply to ketorolac. Since its major marketed use is as an analgesic and its potent effect on prostaglandin synthesis may not be well recognized, those cautions must be emphasized.
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Affiliation(s)
- C J Pearce
- Louisiana State University School of Medicine, New Orleans
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8
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McDonald JC, Etheredge EE, Frentz GD, Frey DJ, Genre CF, Gonzalez FM, Hayes DH, Landreneau MD. Organ procurement and transplantation in Louisiana: an update after 16 years. J La State Med Soc 1991; 143:29-31. [PMID: 1744494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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9
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Munger MA, Rutherford WF, Anderson L, Hakki AI, Gonzalez FM, Bednarczyk EM, Emmanuel G, Weed SG, Panacek EA, Green JA. Assessment of intravenous fenoldopam mesylate in the management of severe systemic hypertension. Crit Care Med 1990; 18:502-4. [PMID: 1970283 DOI: 10.1097/00003246-199005000-00008] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
To evaluate the acute BP response to iv fenoldopam mesylate (FNP), 14 patients with severe hypertension (diastolic BP 120 to 170 mm Hg) were studied in an open-label trial. Initial infusion rate of FNP was 0.1 microgram/kg.min. Titration to diastolic BP goal (95 to 110 mm Hg) was followed by a constant infusion phase (greater than or equal to 6 h), a detitration phase (2 h), and a postinfusion phase. FNP reduced BP by 27/29 mm Hg (p less than .001) with no significant effect on heart rate. Maintenance of the BP effect was noted through the 6 h of constant rate infusion. Mild, transient vasodilating-associated adverse effects were noted with FNP. We conclude that FNP is an effective, well-tolerated iv antihypertensive agent for acute BP reduction in a severely hypertensive population.
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MESH Headings
- 2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine/administration & dosage
- 2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine/analogs & derivatives
- 2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine/pharmacology
- 2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine/therapeutic use
- Adult
- Aged
- Blood Pressure/drug effects
- Female
- Fenoldopam
- Heart Rate/drug effects
- Hemodynamics/drug effects
- Humans
- Hypertension/drug therapy
- Hypertension/etiology
- Hypertension/physiopathology
- Infusions, Intravenous
- Kidney/drug effects
- Male
- Middle Aged
- Vasodilator Agents/therapeutic use
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Affiliation(s)
- M A Munger
- Department of Medicine, Case Western Reserve University, Cleveland, OH
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10
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Abstract
In an open-label study, we compared the efficacy and safety of intravenous infusion of fenoldopam mesylate with that of sodium nitroprusside in patients with severe hypertension or in hypertensive crisis. Both antihypertensive medications were infused at a maximal dose increment of 0.2 microgram/kg/min (fenoldopam) and 1 microgram/kg/min (nitroprusside), with a maximal infusion rate of 1.5 micrograms/kg/min fenoldopam mesylate or 8 micrograms/kg/min sodium nitroprusside. Once the desired reduction in diastolic blood pressure was achieved (less than 110 mm Hg if initial diastolic blood pressure was 120-149 mm Hg, or by at least 40 mm Hg if initial diastolic blood pressure was 150-190 mm Hg), the maximal infusion rate used was maintained for at least 1 hour, and then, the infusion was slowed gradually over 2 hours. After the infusion treatment, patients remained in the hospital for 2 days of follow-up. Both antihypertensive agents successfully controlled the blood pressure in all the patients by the end of the maintenance periods. Between the baseline and the end of the maintenance period, analysis of variance showed that the changes in the variables induced by fenoldopam mesylate did not differ significantly from those induced by sodium nitroprusside. The incidence of side effects listed were similar in both groups of patients. The detection of toxic levels of thiocyanate in two patients treated with nitroprusside, however, shows that fenoldopam might be preferable for the control of a hypertensive crisis or severe hypertension in patients with decreased renal function.
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MESH Headings
- 2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine/adverse effects
- 2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine/analogs & derivatives
- 2,3,4,5-Tetrahydro-7,8-dihydroxy-1-phenyl-1H-3-benzazepine/therapeutic use
- Adult
- Blood Pressure/drug effects
- Blood Urea Nitrogen
- Creatine/blood
- Fenoldopam
- Ferricyanides/therapeutic use
- Heart Rate/drug effects
- Humans
- Hypertension/drug therapy
- Hypertension/metabolism
- Hypertension/physiopathology
- Injections, Intravenous
- Middle Aged
- Nitroprusside/adverse effects
- Nitroprusside/therapeutic use
- Randomized Controlled Trials as Topic
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Affiliation(s)
- E Reisin
- Nephrology Section, Louisiana State University, New Orleans
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11
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Llamas-Elvira JM, Martinez-Paredes M, Jimenez-Heffernan A, Sopena R, Requena MJ, Gonzalez FM, Torres M, Mateo A. 99Tcm-MAG3 for quantitation of differential renal function. Nucl Med Commun 1989; 10:759-64. [PMID: 2559380 DOI: 10.1097/00006231-198910000-00008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We studied two different methods for the evaluation of differential renal function in a group of 100 patients with various kidney disorders whose effective renal plasma flow (ERPF) had been calculated previously by single 125I-orthoiodohippurate (OIH) injection and multiple blood sampling. Patients were divided into three groups according to their ERPF:ERPF is greater than or equal to 250 ml min-1; ERPF less than or equal to 100 ml min-1; and ERPF greater than 100 ml min-1 and less than 250 ml min-1. The two methods used to assess differential renal function were: first, relative 99Tcm-dimercaptosuccinic acid (DMSA) uptake calculated by normalized background and attenuation corrected cumulative counts in each kidney 24 h p.i.; and second, relative 99Tcm-mercaptoacetyl-triglycine (MAG3) uptake within 1 and 2 min p.i. calculated by normalized background and attenuation corrected counts on each renal area. The results obtained with each method correlated strongly with high significance (p less than 0.0001). In the right kidney, mean values obtained with 99Tcm-MAG3 tend to be higher than mean values obtained with 99Tcm-DMSA.
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12
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Bednarczyk EM, White WB, Munger MA, Gonzalez FM, Panacek EA, Weed SG, Rutherford WF, Nara AR, Green JA. Comparative acute blood pressure reduction from intravenous fenoldopam mesylate versus sodium nitroprusside in severe systemic hypertension. Am J Cardiol 1989; 63:993-6. [PMID: 2564726 DOI: 10.1016/0002-9149(89)90157-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- E M Bednarczyk
- Division of Cardiology, University Hospitals of Cleveland, Ohio 44106
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13
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Abstract
To determine the effects of dopamine-1 agonist therapy in severe hypertension, blood pressure, heart rate, catecholamines and left ventricular function were studied in 18 patients (10 with renal disease) with diastolic blood pressure greater than 120 mm Hg (range 124 to 160) after intravenous fenoldopam therapy. Constant infusions of fenoldopam were titrated upward every 10 to 20 min from an initial dose of 0.1 microgram/kg per min to a maximal dose of 0.9 microgram/kg per min. The therapeutic goal of a supine diastolic blood pressure of less than 110 mm Hg was achieved in every patient within 1 h at an average dose of 0.34 +/- 0.22 microgram/kg per min. Blood pressure decreased from 214/134 +/- 33/10 mm Hg at baseline to 170/96 +/- 29/7 mm Hg (p less than 0.0001) at 3 h, whereas heart rate increased from 77 +/- 23 to 88 +/- 21 beats/min (p less than 0.01). Plasma norepinephrine increased during the fenoldopam infusion; epinephrine and dopamine levels did not change. Two indexes of left ventricular function (end-systolic dimension and isovolumic relaxation time) improved during the fenoldopam infusion, but mitral flow velocities during ventricular filling were unchanged. Side effects of intravenous fenoldopam were mild, transient and associated with the marked vasodilatory properties of the drug. Thus, fenoldopam is safe and effective as a parenteral monotherapy in patients with severe essential and renovascular hypertension. Preliminary data suggest that blood pressure reduction with selective dopamine-1 agonist therapy is accompanied by improved left ventricular function.
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Affiliation(s)
- W B White
- Department of Medicine, University of Connecticut School of Medicine, Farmington
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Kumar P, Pearson JE, Martin DH, Leech SH, Buisseret PD, Bezbak HC, Gonzalez FM, Royer JR, Streicher HZ, Saxinger WC. Transmission of human immunodeficiency virus by transplantation of a renal allograft, with development of the acquired immunodeficiency syndrome. Ann Intern Med 1987; 106:244-5. [PMID: 3541725 DOI: 10.7326/0003-4819-106-2-244] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
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Abstract
The present study compared the effects of acetylcholine to cyanide under the same experimental conditions of renal clearance in anesthetized dogs. Since cyanide is one of the few drugs for which the mechanism of action is known (cytotoxic hypoxia), some insight may be gained into the renal effects of acetylcholine since both produce direct natriuresis and diuresis. Infusion of 0.2 microgram/kg/min of acetylcholine and 12.0 microgram/kg/min of sodium cyanide into the left renal artery resulted in similar effects, i.e., increased fractional excretion of sodium, potassium, calcium, and magnesium. These effects were immediate and ipsilateral. Both agents increased the renal plasma flow to the same extent. In addition, regression plots of the relation between changes in sodium excretion and changes in renal plasma flow were similar for both agents. The pattern of similar renal functional changes suggested that acetylcholine is not a mere renal vasodilator but that its action is also medicated through alterations on direct transport of ions.
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Abstract
A surgical technique is described for the short urethra. The malformation is also described and differentiated from penile curvature of cutaneous origin. The urethroplasty involves division of the short urethra and the design of an island flap using penile skin formed into a tube over a sound. The reconstructed segment is placed between two divided segments of the original short urethra and restores its natural length. Complications and results are discussed. We have also encountered cases characterised by a slight curvature of the penis that was corrected after dissecting out the urethra over the full length of the penis. We call this "penile curvature due to anomalous disposition of the urethra", (Diaz Gomez, 1979) and it is remedied by moving the freed urethra 2-3 mm lower with the aid of sutures anchored to Buck's fascia.
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Kumar P, Leech SH, Gonzalez FM, Kodlin D. Steroid treatment for routine immunosuppression in cadaver renal transplantation. A survey of hospitals. Proc Clin Dial Transplant Forum 1978; 8:90-2. [PMID: 386327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A review of data from 22 hospitals in the U.S. and Canada, comprised of information on 1700 kidney transplant patients, shows a consistent pattern with respect to usage of steroids both as routine treatment and for rejection episodes. High doses are associated with greater patient mortality. Graft survival is also adversely affected by very high doses, but only in the immediate post-transplant period. Our data suggest that for optimal graft and patient survival the dosage of steroids should be less than 150 mg/day of methylprednisolone on days 1-3, less than 50 mg/day of prednisone on days 4-21, less than 30 mg/day on days 22-30, and less than 20 mg/day between one mo and one yr.
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Holbert RD, Pearson JE, Gonzalez FM. Effect of sodium acetate infusion on renal function in the dog. Arch Int Pharmacodyn Ther 1976; 219:211-22. [PMID: 5975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Sodium acetate (AC) is routinely used in dialysis solutions in hemodialysis units as it provides a ready source of fixed base. The renal dynamics of the buffer salt are not well known. Anesthetized dogs received i.v. infusions of AC at a rate of 40 to 600 muEq/kg/min. Urinary AC and bicarbonate excretion was measured and correlated with PAH and creatinine clearance and urinary electrolyte excretion. AC appeared in the urine as quickly as it was detected in the plasma. Its excretion gradually increased and tended to parallel bicarbonate excretion. PAH clearance increased with the advent of AC infusion, plasma pH and bicarbonate increase as AC is introduced. AC infusion caused an immediate drop in blood pressure. The systolic blood pressure returned to control in 3-5 min; there was a more gradual return in diastolic pressure. We conclude that AC is filtered and excreted into the urine at low plasma levels and has a low renal threshold.
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Abstract
A prototype of artificial kidney with regeneration of the dialysis fluid in active carbon at low temperature is presented. The data obtained through a series of simulated dialysis show that carbon adsorbs, besides creatinine and other compounds, urea in satisfactory quantities. Furthermore, the possibility of completely regenerating carbon with tap water washing makes the routine use of an artificial kidney based on a cold operating carbon depurator extremely practical.
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Freeman JA, Gonzalez FM. Renal biopsy. J La State Med Soc 1968; 120:439-44. [PMID: 5715676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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