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Valente F, Stefanidis C, Vachiéry J, Dewachter C, Engelman E, Eyden FV, Roussoulières A. A Novel Metrics to Predict Right Heart Failure after Left Ventricular Assist Device Implantation. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.1115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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2
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Macera F, Roussoulières A, Dewachter C, Stefanidis C, Eynden FV, Bondue A, Vachiéry J. Diffusion Lung Capacity (DLCO) Correlates with Pre-Implant Pulmonary Hypertension and Predicts Outcome in Patients with HF Implanted with a LVAD. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.1178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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3
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Valente F, Vachiery J, Dewachter C, Stefanidis C, Vanden Eyden F, De Maertelaer V, Roussoulieres A. Validation of the EUROMACS right-sided heart failure risk score in left ventricular assist device patients: a single center experience. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Right Heart failure (RHF) is a severe complication after left ventricular assist device (LVAD) implantation, increasing early and late mortality. A simple 5-item score, the EUROMACS-RHF risk score, was developed to predict early RHF and mortality after implantation.
Purpose
The aim of the study was to investigate whether EUROMACS-RHF risk score was applicable in a single center to predict early (<30 days) post-operative RHF.
Methods
From February 2011 to October 2019 all LVAD implanted patients in our institution were retrospectively reviewed. Only patients with complete data for risk score calculation and RHF analysis were included. Baseline characteristics and hospitalization data, including preoperative clinical, biological, echocardiographic and hemodynamic data were obtained. Based on these informations, EUROMACS-RHF risk score was calculated and classified in low, intermediate and high.
The link between the EUROMACS-RHF risk score and early severe RHF was investigated using Pearson's exact chi-square tests.
Results
The analysis included 88 patients (67 males; 49±2 years). Etiology of HF was ischemic in 36 patients (41%), dilated cardiomyopathy in 21 (24%) and others causes in 31 (35%). A Heart Ware LVAD (94%) was implanted as bridge to transplantation in 96% of the patients; 81 patients (90%) had severe INTERMACS (1–3) profile.
RHF was identified in 21 patients (24.1%), of which 15 (18%) were treated with inotropes for ≥14 days, 8 (9%) had an RVAD, and 11 (13%) were treated with inhaled NO for ≥48 hours. Patients with severe RHF had a significantly longer length of ICU stay compared to patients without (median 20 days versus 6,5 days). The early (<30 days) post-operatory mortality was of 43% (n=9/21) in the RHF group and 6% (n=4/69) in patients without RHF (p<0.001). Three of the twelve patients alive in the RHF group had an emergency transplant.
The prediction of RHF from the EUROMACS-RHF risk score and the observed severe RHF are presented in the table. A high preoperative EUROMACS-RHF score was able to predict the presence of RHF in 52% of patients (p=0.005), while a low score predicted the absence of RHF in 52% of patients (p<0.001). In contrast, an intermediate EUROMACS risk score was not found to predict early RHF (p=0.283).
Conclusion
In our cohort, the EUROMACS-RHF risk score was effective in predicting early severe RHF, in particular for patients with preoperatory low (no RHF) and high (RHF) scores. This external validation confirms the clinical usefulness in risk prediction before LVAD implantation.
Figure 1
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- F Valente
- Université libre de Bruxelles (ULB), Dept of Cardiology, Hôpital Erasme, Brussels, Belgium
| | - J.L Vachiery
- Université libre de Bruxelles (ULB), Dept of Cardiology, Hôpital Erasme, Brussels, Belgium
| | - C Dewachter
- Université libre de Bruxelles (ULB), Dept of Cardiology, Hôpital Erasme, Brussels, Belgium
| | - C Stefanidis
- Université libre de Bruxelles (ULB), Dept of Cardiac Surgery, Hôpital Erasme, Brussels, Belgium
| | - F Vanden Eyden
- Université libre de Bruxelles (ULB), Dept of Cardiac Surgery, Hôpital Erasme, Brussels, Belgium
| | - V De Maertelaer
- Université libre de Bruxelles (ULB), Service de Biostatistique et Informatique médicale (SBIM), Brussels, Belgium
| | - A Roussoulieres
- Université libre de Bruxelles (ULB), Dept of Cardiology, Hôpital Erasme, Brussels, Belgium
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Stefanidis C, Engelman E, Mourad ME, Roussoulières A, Vachiery J, Oumeiri BE, Chirade M, Eynden FV. Pharmacological Treatment of Pump-Related Thrombosis in Patients with Left Ventricular Assist Device (HearWare HVAD). J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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5
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Kairis C, Stefanidis C, Saxpekidis B, Petridis C, Mosialos L, Stosic T, Tsinopoulos G, Koufou E. 1099 Constrictive pericarditis:a challenge in Cardiology. Eur Heart J Cardiovasc Imaging 2020. [DOI: 10.1093/ehjci/jez319.648] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Funding Acknowledgements
none
A 50-year old woman had complained about dyspnea and leg swelling despite taking furosemide 80 mgr per day.
Her past medical history had included radiation therapy for Hodgkin"s lymphoma, prosthetic heart valves (mechanical MV, AV- INR = 3,2) and permanent pacemaker. Also her coronary vessels were normal.
On clinical examination she was non-febrile, the arterial pressure was 120/80mmHg,there was atrial fibrillation at 70 pulses/min at rest and oxygen saturation was 96%.
The chest x-ray finding was left pleural effusion. The patient also had ascites.
Kidney function was normal without proteinuria. The diagnostic paracentesis and biochemical analysis of ascitic fluid was indicative of transudative fluid.Cytologic analysis was negative for malignancy. Moreover,needle biopsy specimen was subjected to histopathology,which was negative for malignancy.
Echocardiography had revealed normal size and function of left ventricle ( LV = 46mm-EF = 60%). The mechanical valves had normal function, without paravalvular leak or masses. Also right ventricle was normal. The pulmonary artery pressure measured by echocardiography was in the normal range (RVSP = 35mmHg), but the inferior vena cava was dilated.There were also dilated hepatic veins and hepatic vein flow reversal.There was variation> 25% in triscupid inflow with respiration. TEE had confirmed the findings of transthoracic echo with regard of prosthetic valves.
CT of chest and abdomen findings were no pathologic lymphadenopathy,no pulmonary embolism and absence of tumor compressing inferior vena cava. Chest CT scan had demonstrated pericardium thickening,indicative of constrictive pericarditis. CMR was not performed because of permanent pacemaker.
The final step in diagnostic algorithm was cardiac catheterization:
a)the pulmonary artery systolic pressure measured during right heart catheterization was 35mmHg.
b)dip & plateau’ pattern or ‘square root sign of right ventricle, i.e. pattern of accentuated early dip in diastolic pressure, followed by plateauing in mid-late diastole.
c)prominent y wave of right atrium- absent x wave because of AF.
d)left ventriculography was not performed because of mechanical aortic valve.
At the end constrictive pericarditis was confirmed by the surgical report.
According to ESC guidelines a diagnosis of constrictive pericarditis is based on the association of signs and symptoms of right heart failure and impaired diastolic filling due to pericardial constriction by one or more imaging methods, including echocardiography, CT, CMR, and cardiac catheterization.
However,the most important step is the suspicion of constrictive pericarditis, especially in patients with history of radiation therapy and heart surgery.
Abstract 1099 Figure.
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Affiliation(s)
- C Kairis
- Private Practice, Cardiologist, Drama, Greece
| | - C Stefanidis
- General Hospital of Xanthi, Consultant Cardiologist, Xanthi, Greece
| | - B Saxpekidis
- Hospital Papageorgiou, Consultant Cardiologist, Thessaloniki, Greece
| | - C Petridis
- Private Practice, Radiologist, Drama, Greece
| | - L Mosialos
- Hospital Papageorgiou, Cath Lab,Consultant Cardiologist, Thessaloniki, Greece
| | - T Stosic
- General Hospital of Paralimni, Cardiologist, Paralimni, Cyprus
| | - G Tsinopoulos
- General Hospital of Serres, Consultant Cardiologist, Serres, Greece
| | - E Koufou
- Private Practice, Neurologist, Drama, Greece
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6
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Jungels C, Stefanidis C, Hackx M, Oana M, Colonval P. [An unusual digestive occlusion]. Rev Med Brux 2015; 36:42-44. [PMID: 25856971] [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: 06/04/2023]
Abstract
Malignant melanoma is a rapidly metastatic disease. Metastasis in the small intestine is as such not uncommon, whereas the clinical presentation of obstruction due to intussusception is very rare. We hereafter report the case of a 58-year-old female admitted with general degradation, syndrome of intestinal occlusion and a cervical mass. Imaging studies showed signs suggesting an invagination of the small intestine. A resection of the cervical mass and segmental small intestine resection were performed. Pathological findings revealed a cervical malignant melanoma spread into the small intestine. The diagnosis of intestinal metastasis should therefore be considered in patients with intestinal occlusion and history of melanoma and presenting gastrointestinal symptoms.
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Koufadaki AM, Karavanaki KA, Soldatou A, Tsentidis C, Sourani MP, Sdogou T, Haliotis FA, Stefanidis CJ. Clinical and laboratory indices of severe renal lesions in children with febrile urinary tract infection. Acta Paediatr 2014; 103:e404-9. [PMID: 24862642 DOI: 10.1111/apa.12706] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 04/21/2014] [Accepted: 05/23/2014] [Indexed: 11/29/2022]
Abstract
AIM To evaluate the predictive value of various clinical and laboratory parameters on the identification of acute extensive and/or multifocal renal involvement in children with febrile urinary tract infections (UTI). METHODS The medical records of 148 children (median age: 2.4 months, range: 11 days-24 months), who were admitted during a 3-year period with a first episode of febrile UTI, were analysed. Acute dimercaptosuccinic acid scintigraphy (DMSA), clinical and laboratory parameters were evaluated. RESULTS Seventy six children (51%) had abnormal findings on the acute DMSA. Of them, 20 had DMSA grade 2, while 56 had grade 3 and 4. Patients with a DMSA grade 3 and 4 were more likely to have shivering (OR 3.4), white blood count (WBC) ≥ 18 000/μL (OR 2.4), absolute neutrophil count (ANC) ≥ 9300/μL (OR 4.4), C-reactive protein (CRP) ≥ 50 mg/L (OR 2.7) and procalcitonin (PCT) ≥ 1.64 ng/mL (OR diagnostic). There was a significant difference of WBC (p = 0.004), ANC, CRP and PCT levels (p < 0.001) between children with normal and grade 2 aDMSA versus those with aDMSA grade 3 and 4. CONCLUSIONS Shivering and elevated inflammatory markers increase the risk of acute extensive and/or multifocal kidney involvement in children with febrile UTI. Procalcitonin seems to be an excellent marker of the severity of acute parenchymal involvement.
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Affiliation(s)
- AM Koufadaki
- Second Department of Pediatrics; University of Athens; “P. & A. Kyriakou” Children's Hospital; Athens Greece
| | - KA Karavanaki
- Second Department of Pediatrics; University of Athens; “P. & A. Kyriakou” Children's Hospital; Athens Greece
| | - A Soldatou
- Second Department of Pediatrics; University of Athens; “P. & A. Kyriakou” Children's Hospital; Athens Greece
| | - Ch Tsentidis
- Second Department of Pediatrics; University of Athens; “P. & A. Kyriakou” Children's Hospital; Athens Greece
| | - MP Sourani
- Second Department of Pediatrics; “Aghia Sophia” Children's Hospital; Athens Greece
| | - T Sdogou
- Second Department of Pediatrics; University of Athens; “P. & A. Kyriakou” Children's Hospital; Athens Greece
| | - FA Haliotis
- Second Department of Pediatrics; “Aghia Sophia” Children's Hospital; Athens Greece
| | - CJ Stefanidis
- Department of Pediatric Nephrology; “P. & A. Kyriakou” Children's Hospital; Athens Greece
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Habib SM, Abrahams AC, Korte MR, Clahsen-van Groningen M, Betjes MGH, Lopes Barreto D, Struijk DG, Krediet RT, Abrahams AC, Habib SM, Dendooven A, van der Giezen DM, Garchow K, Toorop RJ, Watson CJE, Boer WH, Riser BL, Nguyen TQ, Latus J, Fritz P, Ulmer C, Segerer S, Alscher D, Braun N, Aoki S, Makino J, Noguchi M, Toda S, Shroff R, Stefanidis C, Edifonti A, Ekim M, Ariceta G, Bakkaloglu S, Fischbach M, Klaus G, Zurowska A, Schmitt CP, Watson A. Encapsulating peritoneal sclerosis. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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9
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Shi H, Wen J, LI Z, Elsayed M, Kamal K, LI Z, Wen J, Shi H, El Shal A, Youssef D, Caubet C, Lacroix C, Benjamin B, Bandin F, Bascands JL, Monsarrat B, Decramer S, Schanstra J, Laetitia DB, Ulinski T, Aoun B, Ozdemir K, Dincel N, Sozeri B, Mir S, Dincel N, Berdeli A, Mir S, Akyigit F, Mizerska-Wasiak M, Panczyk-Tomaszewska M, Szymanik-Grzelak H, Roszkowska-Blaim M, Jamin A, Dehoux L, Monteiro RC, Deschenes G, Bouts A, Davin JC, Dorresteijn E, Schreuder M, Lilien M, Oosterveld M, Kramer S, Gruppen M, Pintos-Morell G, Ramaswami U, Parini R, Rohrbach M, Kalkum G, Beck M, Carter M, Antwi S, Callegari J, Kotanko P, Levin NW, Rumjon A, Macdougall IC, Turner C, Booth CJ, Goldsmith D, Sinha MD, Camilla R, Camilla R, Loiacono E, Donadio ME, Conrieri M, Bianciotto M, Bosetti FM, Peruzzi L, Conti G, Bitto A, Amore A, Coppo R, Mizerska-Wasiak M, Roszkowska-Blaim M, Maldyk J, Chou HH, Chiou YY, Bochniewska V, Jobs K, Jung A, Fallahzadeh Abarghooei MH, Zare J, Sedighi Goorabi V, Derakhshan A, Basiratnia M, Fallahzadeh Abarghooei MA, Hosseini Al-Hashemi G, Fallahzadeh Abarghooei F, Kluska-Jozwiak A, Soltysiak J, Lipkowska K, Silska M, Fichna P, Skowronska B, Stankiewicz W, Ostalska-Nowicka D, Zachwieja J, Girisgen L, Sonmez F, Yenisey C, Kis E, Cseprekal O, Kerti A, Szabo A, Salvi P, Benetos A, Tulassay T, Reusz G, Makulska I, Szczepanska M, Drozdz D, Zwolnska D, Sozeri B, Berdeli A, Mir S, Tolstova E, Anis L, Ulinski T, Alber B, Edouard B, Gerard C, Seni K, Dunia Julienne Hadiza T, Christian S, Benoit T, Francois B, Adama L, Rosenberg A, Munro J, Murray K, Wainstein B, Ziegler J, Singh-Grewal D, Boros C, Adib N, Elliot E, Fahy R, Mackie F, Kainer G, Polak-Jonkisz D, Zwolinska D, Laszki-Szczachor K, Zwolinska D, Janocha A, Rusiecki L, Sobieszczanska M, Garzotto F, Ricci Z, Clementi A, Cena R, Kim JC, Zanella M, Ronco C, Polak-Jonkisz D, Zwolinska D, Purzyc L, Zwolinska D, Makulska I, Szczepanska M, Peco-Antic A, Kotur-Stevuljevic J, Paripovic D, Scekic G, Milosevski-Lomic G, Bogicevic D, Spasojevic-Dimitrijeva B, Hassan R, El-Husseini A, Sobh M, Ghoneim M, Harambat J, Bonthuis M, Van Stralen KJ, Ariceta G, Battelino N, Jahnukainen T, Sandes AR, Combe C, Jager KJ, Verrina E, Schaefer F, Espindola R, Bacchetta J, Cochat P, Stefanis C, Leroy S, Leroy S, Fernandez-Lopez A, Nikfar R, Romanello C, Bouissou F, Gervaix A, Gurgoze M, Bressan S, Smolkin V, Tuerlinkx D, Stefanidis C, Vaos G, Leblond P, Gungor F, Gendrel D, Chalumeau M, Rumjon A, Macdougall IC, Turner C, Rawlins D, Booth CJ, Simpson JM, Sinha MD, Arnaud G, Arnaud G, Anne M, Stephanie T, Flavio B, Veronique FB, Stephane D, Mumford L, Marks S, Ahmad N, Maxwell H, Tizard J, Vidal E, Amigoni A, Varagnolo M, Benetti E, Ghirardo G, Brugnolaro V, Murer L, Aoun B, Christine G, Alber B, Ulinski T, Aoun B, Decramer S, Bandin F, Ulinski T, Degi A, Degi A, Kerti A, Kis E, Cseprekal O, Szabo AJ, Reusz GS, Ghirardo G, Vidoni A, Vidal E, Benetti E, Ramondo G, Miotto D, Murer L. Paediatric nephrology. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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10
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Stefanidis C, Sanoussi A, Demanet H, Castro-Rodriguez J, Wauthy P. [Acute myocardial infarction due to an acute aortic dissection]. Rev Med Brux 2011; 32:179-181. [PMID: 21834447] [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: 05/31/2023]
Abstract
Myocardial ischemia secondary to dissection of the ascending aorta remains a relatively rare complication. A 76-year old man with no prior history developed sudden chest pain. The electrocardiogram showed a ST-segment elevation in leads II and III suggesting an inferior wall acute myocardial infarction. Upon arrival, he received anticoagulation and antiplatelet aggregation intravenously and orally respectively. Coronary angiography showed an anomalous origin of the right coronary and extrinsic stenosis by a false lumen. Computed tomography confirmed the diagnosis of type A aortic dissection with an extension to the right coronary. Emergency ascending aorta replacement with Dacron graft and a right coronary artery graft was perfomed. This case illustrates how myocardial infarction can mask an aortic dissection. The initial treatment of a myocardial infarction with anticoagulation and/or oral antiplatelet aggregation should not be modified, even if it increases postoperative bleeding when emergent cardiac surgery is necessary.
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Affiliation(s)
- C Stefanidis
- Services de Chirurgie Cardiaque, C.H.U. Brugmann.
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Roupakias S, Tsikopoulos G, Stefanidis C, Skoumis K, Zioutis I. Isolated double gastric rupture caused by blunt abdominal trauma in an eighteen months old child: a case report. Hippokratia 2008; 12:50-52. [PMID: 18923758 PMCID: PMC2532966] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We report a case of an isolated double gastric rupture, resulted from blunt abdominal trauma, that we successfully repaired by primary closure. A 18-month-old girl injured in a motor vehicle accident was admitted to our hospital where the plain X-ray and the CT findings revealed the presence of free abdominal air. An immediate performed exploratory laparotomy disclosed two full-thickness ruptures of the stomach (on the greater curvature and the posterior wall). The ruptures were closed primarily by a two-layer closure. Twenty-four hours post-operatively the patient developed delayed shock as a result of chemical peritonitis. On the 8th postoperative day the girl developed septic shock and gastrorrhagia. She underwent a gastroscopy which revealed stress-ulcer, and was treated conservatively in the children intensive care unit of our hospital. She was discharged home on 20th postoperative day. At 3-month follow up, she was doing well with normal growth and eating a regular regimen about her age. Gastric rupture following blunt abdominal trauma is rare, with a reported incidence of 0.02-1.7%. The morbidity and mortality are directly related to the number of associated injuries, the delay in diagnosis and the development of intraabdominal sepsis. In this paper we emphasise the need for early diagnosis and the aggressive surgical treatment as a key to decreasing the mortality and morbidity from this relatively rare injury, especially in this age group of children.
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Affiliation(s)
- S Roupakias
- Pediatric Surgery Departement, Hippokration General Hospital of Thessaloniki, Greece
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Drakakis P, Loutradis D, Milingos S, Stefanidis C, Marinopoulos S, Protopapas A, Antsaklis A. 1141605463 Autoimmune and thrombophilic causes of recurrent pregnancy loss in greek couples. Am J Reprod Immunol 2006. [DOI: 10.1111/j.1600-0897.2006.00383_32.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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13
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Rodolakis A, Diakomanolis E, Vlachos G, Iconomou T, Protopappas A, Stefanidis C, Elsheikh H, Michalas S. Vulvar intraepithelial neoplasia (VIN)--diagnostic and therapeutic challenges. EUR J GYNAECOL ONCOL 2003; 24:317-22. [PMID: 12807248] [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: 03/03/2023]
Abstract
PURPOSE Vulvar intraepithelial neoplasia (VIN) represents a current diagnostic and therapeutic challenge. The present retrospective study is an institutional experience on the diagnosis and management of VIN. METHODS One hundred and thirteen women with VIN were reviewed and analyzed. Diagnosis was established by colposcopically directed biopsies whereas treatment was performed by either a surgical or a laser CO2 approach. RESULTS The mean age of all VIN patients was 47.4 years. The most common symptom was pruritus (60.1%). The majority of the lesions were multifocal (N = 64, 56.6%) and located in the non-hairy part of the vulva (87.6%). VIN management consisted of laser CO2 treatment in 51 patients (45.1%), surgical treatment in 37 (32.7%) whereas 25 VIN, cases were managed by conventional medical treatment. The risk of disease relapse was not associated with VIN grade (p = 0.35) nor with the treatment modality used (p = 0.42). The risk of disease relapse was significantly higher for multifocal lesions (p < 0.001). Long-term follow-up of our patients showed that four patients (3.5%) developed an invasive vulvar carcinoma. CONCLUSION Our study confirms other reports concerning the diagnostic and treatment difficulties of the management of VIN. Although the benefits of treatment are obvious there seems to be no guarantee that invasion will not occur.
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Affiliation(s)
- A Rodolakis
- 1st Department of Obstetrics and Gynecology, Gynecologic Oncology & Colposcopy Units, Athens University, Alexandra Hospital, Athens, Greece
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Abstract
We describe a rare case of a 21-year-old man presenting with hereditary multiple exostosis and a pseudoaneurysm of the popliteal artery caused by femoral osteochondroma. Principles of management and surgical technique are discussed.
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Affiliation(s)
- R Chamlou
- Erasme University Hospital, Department of Digestive Surgery, Route de Lennik, 808 B-1070 Bruxelles.
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15
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Affiliation(s)
- C J Stefanidis
- Division of Nephrology, A. & P. Kyriakou Children's Hospital, Athens, Greece
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16
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Kapias T, Griffiths RF, Stefanidis C. Spill behaviour using REACTPOOL. Part II. Results for accidental releases of silicon tetrachloride (SiCl(4)). J Hazard Mater 2001; 81:209-222. [PMID: 11163688 DOI: 10.1016/s0304-3894(00)00296-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Silicon tetrachloride is a toxic, corrosive water reactive substance that is used widely in the process industries. On spillage from containment it creates liquid pools that can either boil or evaporate. The main feature of the pool behaviour is the exothermic reaction with water. There are three sources of water available for reaction: free ground water, substrate water and atmospheric moisture. Hydrogen chloride gas and ortho-silicic acid solid (or silica gel) are produced by the hydrolysis reaction. The purpose of this paper is to describe the dangers involved in cases of accidental releases of silicon tetrachloride, to report its properties, referring to toxicity data, major accidents and mitigation tests. It also describes pool behaviour using REACTPOOL [1]. Model results indicate that the pool behaviour is governed mainly by the amount of water available for reaction. Surface roughness and wind speed also have a significant effect on the results. Results are compared with those for other water reactive chemicals in Part III of this series of papers [3]. The generated cloud will initially contain silicon tetrachloride and hydrogen chloride with numerous processes taking place. Although silicon tetrachloride has been involved in many major hazard incidents, there are no experimental data relevant to the modelling requirements.
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Affiliation(s)
- T Kapias
- Department of Chemical Engineering, Environmental Technology Centre, UMIST P.O. Box 88, Manchester, M60 1QD, UK.
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Kapias T, Griffiths RF, Stefanidis C. REACTPOOL: a code implementing a new multi-compound pool model that accounts for chemical reactions and changing composition for spills of water reactive chemicals. J Hazard Mater 2001; 81:1-18. [PMID: 11118681 DOI: 10.1016/s0304-3894(00)00294-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
All chemicals that react violently with water or in contact with water liberate toxic gas are included in the list of substances covered by the majority of the international legislation on major hazards. This category includes a large number of chemicals that are used widely in the process industries. A survey of accidents that occurred in the last 10 years in the USA shows numerous major incidents that involved spillages of these substances. Even so, there are almost no experimental data on the behaviour of these chemicals on release. Furthermore, there are very few published studies on modelling the behaviour of such spillages, except in the case of hydrogen fluoride. In previous work we reported a new theoretical model [J. Haz. Mat. 62 (1998) 101-129, J. Haz. Mat. 62 (1998) 131-142, J. Haz. Mat. A67 (1999) 9-40], that describes accidental spills of SO(3) and oleum, which are substances with very complex behaviour that belong to this category. It describes both the pool [J. Haz. Mat. 62 (1998) 101-129, J. Haz. Mat. 62 (1998) 131-142] and the cloud behaviour [J. Haz. Mat. A67 (1999) 9-40]. In the work reported here the pool model was modified in a generic form in order to include other water reactive chemicals. REACTPOOL is a new code that can be used for both instantaneous and continuous liquid releases under a wide range of input parameters (steady or varying). It can be used for all liquids irrespective of their volatility and reactivity, and it describes pools consisting of more than one liquid that can have changing composition and properties. The purpose of this paper is to present the general procedure followed in REACTPOOL and to show how the new model has been modified and implemented for substances other than SO(3) and oleum. The modelling procedure has been implemented in a computer code written in Visual Basic, and results of the model have been generated using this code. It should be noted that this model requires validation data, but that the availability of such data awaits the performance of suitable experimental investigations.
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Affiliation(s)
- T Kapias
- Department of Chemical Engineering, Environmental Technology Centre, UMIST PO Box 88, M60 1QD, Manchester, UK.
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Mylonas AI, Massoulas GB, Nicolatou O, Dontas IA, Nakopoulou L, Stefanidis CJ. Progress of ossification and epithelialization of wounds after simple or surgical extractions of teeth in rats with chronic renal failure: an experimental study. Br J Oral Maxillofac Surg 2000; 38:35-43. [PMID: 10783446 DOI: 10.1054/bjom.1999.0029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 11/18/2022]
Abstract
Our aim was to investigate the progress of wound healing after simple and surgical removal of the first two molars of the right and left maxillary segments, respectively, in Wistar rats with experimentally induced moderate chronic renal failure (CRF). Sixty Wistar rats were divided into two groups of 30 rats each: experimental and control. CRF was induced in the experimental group by an intraperitoneal injection of cisplatin, 5 mg/kg body weight (BW) initially and then with two maintenance doses of 2.5 mg/kg BW at intervals of one month. The teeth were extracted one month after the last dose of cisplatin. The sockets and the kidneys of all the rats of both groups were evaluated. The mandibles of the 15 rats in the experimental group that developed moderate CRF, together with those of two controls, were evaluated for abnormalities that suggested renal osteodystrophy. The histopathological examination showed: (a) that there were no significant differences in the pattern of wound healing no matter how the tooth was extracted; (b) there were no specific abnormalities in the mandible to indicate of secondary hyperparathyroidism or renal osteodystrophy; and (c) the kidneys of the rats of the experimental group underwent histopathological changes that were significantly different from those in the controls (P < 0.001). Our results indicate that moderate CRF does not have any appreciable or significant modifying effect on wound healing after tooth extraction in Wistar rats.
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Affiliation(s)
- A I Mylonas
- Department of Oral and Maxillofacial Surgery, School of Dental Medicine, National University of Athens, Greece
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Stefanidis CJ. Is rhGH anabolic in patients undergoing peritoneal dialysis? Br J Clin Pract Suppl 1996; 85:44-6. [PMID: 8995030] [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: 02/03/2023]
Abstract
The effect of rhGH treatment on protein metabolism was studied in nine prepubertal patients on CAPD. An improvement in nitrogen balance as evidenced by a falling of blood urea nitrogen and urea nitrogen appearance with a constant protein intake was noticed. The significant increase in serum creatinine and creatinine excretion with a constant weekly creatinine clearance and the increase in mid-arm muscle circumference were all indications of an improvement in lean body mass. In addition, there was an improvement in the pattern of plasma amino acids and an increase in serum albumin, possibly as a result of the improvement of protein metabolism.
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Stefanidis CJ, Papathanassiou A, Michelis K, Theodoridis X, Papachristou F, Sotiriou J. Diabetes mellitus after therapy with recombinant human growth hormone (rhGH). Br J Clin Pract Suppl 1996; 85:66-7. [PMID: 8995038] [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: 02/03/2023]
Abstract
An eight-year-old boy developed diabetes mellitus (DM) after kidney transplantation. This boy had previously been treated with recombinant human growth hormone (rhGH) for short stature due to chronic renal failure. An impaired glucose tolerance was documented after one year of rhGH treatment. An oral glucose tolerance test returned to normal six months after the discontinuation of rhGH. The boy was treated again with rhGH for seven months until his transplantation. A high fever with an enlargement of the parotid gland was noted and signs of acute rejection appeared two weeks post-transplantation. Two months after transplantation, overt DM had developed, and he was treated with insulin. The insulin dose was progressively decreased and was discontinued eight months after transplantation.
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Stefanidis C, Servais J, Algaba R, Fazeli F, Van Gysel JP, Dernier P. Spontaneous rupture of a left iliac arterial aneurysm. A case report. Acta Chir Belg 1995; 95:11-3. [PMID: 7900484] [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: 01/27/2023]
Abstract
Isolated aneurysm of the iliac arteries is rare. It represents only 1.7% of the aneurysms of the aortic bifurcation involving the arteries (7, 13) and its rupture can be fatal. It is located deep in the pelvis and it is often difficult to detect clinically. The symptoms can mimic genitourinary, gastrointestinal or neurologic disorders. Prompt diagnosis by computerized tomography must be made in cases of emergency. Urgent aneurysmectomy is indicated in case of rupture. The average mortality rate is 50%.
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Affiliation(s)
- C Stefanidis
- Department of Vascular Surgery, Centre Hospitalier J. Bracops, Brussels, Belgium
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Abstract
Systemic-to-pulmonary shunting in growing pigs has been proposed as an experimental model of high-flow pulmonary hypertension associated with congenital heart defects. We investigated multipoint pulmonary arterial pressure (Ppa) vs. cardiac output (Q) plots and pulmonary vascular impedance spectra in 13 piglets aged approximately 4 mo and ventilated alternatively in hyperoxia (inspired O2 fraction 0.4) and in hypoxia (inspired O2 fraction 0.12). The measurements were done 8 wk after either an anastomosis between the thoracic aorta and the pulmonary trunk (n = 7 piglets) or a sham operation (n = 6). Cardiac output was altered by a manipulation of venous return. In the sham-operated piglets, hypoxia increased Ppa by an average of 12 mmHg over the entire range of Q studied, from 60 to 120 ml/kg, and increased both 0 Hz (Z0) and characteristic (Zc) pulmonary vascular impedance. In the shunted piglets compared with the sham-operated piglets in hyperoxia, Ppa was increased by an average of 5-6 mmHg at all levels of Q studied, from 60 to 120 ml/kg (P < 0.01), and Zc was also increased (P < 0.01), whereas Z0 was unchanged. In the shunted piglets, hypoxia increased Ppa at all levels of Q studied only to an average of 3 mmHg, and neither Z0 nor Zc was altered by hypoxia. We conclude that an aortopulmonary shunt of 2-mo duration in growing pigs increases both pulmonary vascular resistance and impedance and is associated with a blunting of pulmonary vascular reactivity to hypoxia.
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Affiliation(s)
- D De Canniere
- Laboratory of Cardiovascular and Respiratory Physiology, Erasme University Hospital, Brussels, Belgium
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De Cannière D, Stefanidis C, Hallemans R, Delcroix M, Lejeune P, Naeije R. Increased left atrial pressure inhibits hypoxic pulmonary vasoconstriction. J Appl Physiol (1985) 1994; 76:1502-6. [PMID: 8045825 DOI: 10.1152/jappl.1994.76.4.1502] [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: 01/28/2023] Open
Abstract
An increase in left atrial pressure (Pla) has been reported to either inhibit or not affect hypoxic pulmonary vasoconstriction in intact dogs. We investigated mean pulmonary arterial pressure (Ppa)-flow (Q) relationships at low and high fixed Pla and Ppa-Pla relationships at fixed Q in piglets, which are known to present with a stronger hypoxic pulmonary pressor response than dogs. Seven piglets were anesthetized; equipped with balloon catheters in inferior vena cava and left atrium to control Q and Pla, respectively; and ventilated alternatively in hyperoxia [fractional concn of O2 in inspired air (FIO2) 0.4] and hypoxia (FIO2 0.12). In all experimental conditions, Ppa-Q plots were best described by a linear approximation with extrapolated pressure intercepts (Pi) not different from Pla. Hypoxia increased slope but not Pi of Ppa-Q plots. An increase in Pla from 8 to 17 mmHg induced a parallel shift of Ppa-Q plots to higher Ppa in hyperoxia but did not affect Ppa-Q plots in hypoxia. In hyperoxia, an increase in Pla at constant Q induced an approximately equal increase in Ppa, whereas in hypoxia there was no effect. The hypoxia-induced increase in Ppa was blunted by increased Pla at all levels of Q studied. We conclude that in anesthetized piglets at fixed Pla hypoxia increases the slope of Ppa-Q plots without affecting Pi and an increase in Pla inhibits hypoxic pulmonary vasoconstriction. The results suggest that no closing pressure higher than normal Pla contributes to hyperoxic or hypoxic Ppa in the intact porcine pulmonary circulation.
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Affiliation(s)
- D De Cannière
- Laboratory of Cardiovascular and Respiratory Physiology, Erasme University Hospital, Brussels, Belgium
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Stefanidis C, el Nakadi I, Huynh CH, de Francquen P, Van Gossum A. Benign thoracic schwannoma and postoperative chylothorax: case report and review of the literature. Acta Chir Belg 1994; 94:105-9. [PMID: 8017150] [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: 01/28/2023]
Abstract
Among all the neurogenic tumours, the benign intrathoracic schwannoma is a rare tumour. Most often it is discovered by accident in the course of a routine X-ray examination of the thorax. Symptoms appear only when size becomes important. The surgical removal of an intrathoracic schwannoma may result in the development of a chylothorax. According to the literature, its treatment remains controversial. The originality of the case we report here is on the one hand the exceptional size of the tumour and the success over the long term of conservative treatment with complete parenteral alimentation, and on the other hand, the inefficacy of the subcutaneous administration of the analogue of somatostatin in reducing a chylothorax with high outflow.
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Affiliation(s)
- C Stefanidis
- Department of Thoracic Surgery, Cliniques Universitaires de Bruxelles, Hôpital Erasme, U.L.B., Belgium
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Ewalenko P, Stefanidis C, Holoye A, Brimioulle S, Naeije R. Pulmonary vascular impedance vs. resistance in hypoxic and hyperoxic dogs: effects of propofol and isoflurane. J Appl Physiol (1985) 1993; 74:2188-93. [PMID: 8335547 DOI: 10.1152/jappl.1993.74.5.2188] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [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: 01/30/2023] Open
Abstract
The pulmonary vascular effects of inhaled anesthetics have been reported variably. We compared the effects of intravenous anesthesia (propofol) and inhalational anesthesia (isoflurane) on multipoint mean [pulmonary arterial pressure (Ppa)-pulmonary arterial occluded pressure (PpaO)]/cardiac output (Q) plots and on pulmonary vascular impedance (PVZ) spectra in eight dogs alternatively ventilated in hyperoxia [inspired O2 fraction (FIO2) 0.4] and in hypoxia (FIO2 0.1). Q was altered by a manipulation of venous return. During propofol, hypoxia increased (Ppa-PpaO) by an average of 2-3 mmHg over the entire range of Q studied, from 1 to 2.5 l.min-1 x m-2. This hypoxic pulmonary vasoconstriction (HPV) was associated with insignificant changes in PVZ. Decreasing Q in hypoxia and hyperoxia did not affect PVZ. Compared with propofol, isoflurane decreased (Ppa-PpaO) by an average of 2-5 mmHg at all levels of Q studied in both hypoxia and hyperoxia but did not affect HPV. During isoflurane anesthesia, 0 Hz PVZ was lower (P < 0.01) in hypoxia, but otherwise the PVZ spectrum was not different from that recorded during propofol anesthesia. We conclude that, in dogs, 1 degree general anesthesia with isoflurane alone decreases pulmonary vascular tone without inhibition of HPV and that 2 degrees pressure/Q plots in the time domain are more sensitive than those in the frequency domain to subtle hemodynamic changes induced by hypoxia or isoflurane at the periphery of the pulmonary vasculature.
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Affiliation(s)
- P Ewalenko
- Laboratory of Cardiovascular and Respiratory Physiology, Free University of Brussels, Belgium
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Abstract
OBJECTIVE The aim was to characterise stimulus-response curves for hypoxic pulmonary vasoconstriction and to observe the effects of drugs reputed to enhance it: aspirin (a cyclo-oxygenase inhibitor), and doxapram (a peripheral chemoreceptor agonist). METHODS Mean pulmonary artery pressure (Ppa) versus fraction of inspired O2 (FIO2) relationships were studied in 18 intact anaesthetised piglets, before and after the intravenous administration, in random order, of either physiological saline, 1 g aspirin, or 20 mg.kg-1 doxapram. Cardiac output (Q) was kept constant, to avoid passive Q dependent changes in Ppa. RESULTS A progressive decrease in FIO2 from 100% to 12% was associated with an average increase in Ppa from 19 to 38 mm Hg (p < 0.001). When FIO2 was further decreased to 8%, Ppa decreased to 32 mm Hg (p < 0.01). This stimulus-response curve was unaffected by saline, but displaced in a non-PO2-dependent manner to higher Ppa by doxapram and by aspirin. CONCLUSIONS The pulmonary vascular response to inspiratory hypoxia in intact anaesthetised piglets is biphasic, with a maximum at an FIO2 of 12%. Neither aspirin nor doxapram affect the shape of this stimulus-response curve, and in particular do not prevent low FIO2 associated inhibition of hypoxic pulmonary vasoconstriction.
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Affiliation(s)
- D De Canniere
- Laboratory of Cardiovascular and Respiratory Physiology, Erasme University Hospital, Brussels, Belgium
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Stefanidis CJ, Koulieri A, Siapera D, Kapogiannis A, Mitsioni A, Michelis K. Effect of the correction of anemia with recombinant human erythropoietin on growth of children treated with CAPD. Adv Perit Dial 1992; 8:460-3. [PMID: 1361848] [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: 03/25/2023]
Abstract
UNLABELLED Anemia correction with recombinant human erythropoietin (EPO) has been suggested to have a positive effect on nutritional status by improving appetite and protein metabolism. To assess this effect growth velocity and various parameters of nutritional status of 10 children on continuous ambulatory peritoneal dialysis (CAPD) were estimated at the start and one year after the correction of anemia. There was no significant improvement of growth velocity after EPO administration. Energy and protein intake, standard deviation scores of anthropometric measurements, BUN, serum creatinine, albumin, potassium, phosphorous and protein catabolic rate did not differ significantly before and after EPO administration. There was a significant correlation of protein intake and protein catabolic rate. CONCLUSION There was no significant improvement of nutritional status and growth of children on CAPD treated with EPO, possibly because there was no evidence of malnutrition in most patients.
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Papadoyannakis NJ, Stefanidis CJ, McGeown M. The effect of the correction of metabolic acidosis on nitrogen and potassium balance of patients with chronic renal failure. Am J Clin Nutr 1984; 40:623-7. [PMID: 6089541 DOI: 10.1093/ajcn/40.3.623] [Citation(s) in RCA: 157] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Nitrogen and potassium balance studies were conducted in six nondialyzed uremic patients. Each patient was investigated before and after supplementation with sodium bicarbonate and sodium chloride. Every period of the study lasted longer than 1 wk. Each patient had the same calorie and protein intake during the whole study. Urea nitrogen appearance was correlated with protein intake for the assessment of the compliance of patients with their diets. There was a significant decrease of blood urea nitrogen (p = 0.014) of 36% during bicarbonate supplementation and both metabolic balance studies improved significantly (p = 0.0005 and 0.0096). However, there was no significant improvement during sodium chloride administration indicating that the effect of bicarbonate was the result of the correction of metabolic acidosis and not of the expansion of the extracellular volume.
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Abstract
Fifteen children undergoing continuous ambulatory peritoneal dialysis for 0.3 to 2.4 years were evaluated longitudinally for renal osteodystrophy. Immunoreactive parathyroid hormone, 25-OHD, total and ionized calcium, inorganic phosphate, and alkaline phosphatase levels were measured regularly. Skeletal radiographic studies were performed at the onset and conclusion of CAPD and at six-month intervals during therapy. All children received 1,25(OH)2D3 and aluminum hydroxide, and nine received supplemental calcium. Plasma 25-OHD concentrations were normal to elevated, and calcium increased steadily to high normal levels despite a trend to persistent hyperphosphatemia. The increased calcium levels suppressed parathyroid hormone overactivity in only one patient. At the onset of CAPD, nine patients had hyperparathyroid bone disease seen radiographically, three of whom also had rachitic lesions. At the end of CAPD, the hyperparathyroid lesions had improved in four patients, completely resolved in three, and deteriorated in two. Rachitic lesions had completely healed in two patients and improved in the third. However, among the six children without radiographically evident lesions at onset of CAPD, hyperparathyroid bone lesions developed in two and rachitic lesions in two others during CAPD. Although CAPD and appropriate therapy benefited most patients with renal osteodystrophy, the benefits were not uniform, and bone lesions deteriorated in some.
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Abstract
Linear growth of 17 children receiving CAPD was compared with growth in 18 patients receiving hemodialysis and 20 who had undergone transplantation, as well as with the previous growth in 11 of the 17 patients. Growth was normal in 10 receiving CAPD, fair in six others, and poor in only one. Growth velocity indexes in those receiving CAPD were significantly better than those of the group receiving hemodialysis (P less than 0.01) but did not differ significantly from those of children who had undergone kidney transplant. All patients grew significantly better after beginning CAPD than before (P less than 0.01). Appropriate management of renal osteodystrophy combined with adequate energy and protein intake were important factors in the growth of patients receiving CAPD.
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