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Samaan F, Freitas RAP, Viana R, Gâmbaro L, Cunha K, Vieira TD, Feitosa V, Correa EA, Maciel AT, Aranha S, Osawa EA, Pillar R, Flato EMDS, da Silva RC, Carneiro E, Souza FBGDL, Rossi PRG, Abud MB, Konigsfeld HP, da Silva RG, de Souza RBC, Coutinho SM, Goes MÂ, da Silva BAB, Zanetta DMT, Burdmann EA. Critically ill patients with COVID-19-associated acute kidney injury treated with kidney replacement therapy: Comparison between the first and second pandemic waves in São Paulo, Brazil. PLoS One 2023; 18:e0293846. [PMID: 37922282 PMCID: PMC10624321 DOI: 10.1371/journal.pone.0293846] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 10/20/2023] [Indexed: 11/05/2023] Open
Abstract
INTRODUCTION This study aimed to compare the characteristics and outcomes of critically ill patients with COVID-19-associated acute kidney injury (AKI) who were treated with kidney replacement therapy (KRT) in the first and second waves of the pandemic in the megalopolis of Sao Paulo, Brazil. METHODS A multicenter retrospective study was conducted in 10 intensive care units (ICUs). Patients aged ≥18 years, and treated with KRT due to COVID-19-associated AKI were included. We compared demographic, laboratory and clinical data, KRT parameters and patient outcomes in the first and second COVID-19 waves. RESULTS We assessed 656 patients (327 in the first wave and 329 in the second one). Second-wave patients were admitted later (7.1±5.0 vs. 5.6±3.9 days after the onset of symptoms, p<0.001), were younger (61.4±13.7 vs. 63.8±13.6 years, p = 0.023), had a lower frequency of diabetes (37.1% vs. 47.1%, p = 0.009) and obesity (29.5% vs. 40.0%, p = 0.007), had a greater need for vasopressors (93.3% vs. 84.6%, p<0.001) and mechanical ventilation (95.7% vs. 87.8%, p<0.001), and had higher lethality (84.8% vs. 72.7%, p<0.001) than first-wave patients. KRT quality markers were independently associated with a reduction in the OR for death in both pandemic waves. CONCLUSIONS In the Sao Paulo megalopolis, the lethality of critically ill patients with COVID-19-associated AKI treated with KRT was higher in the second wave of the pandemic, despite these patients being younger and having fewer comorbidities. Potential factors related to this poor outcome were difficulties in health care access, lack of intra-hospital resources, delay vaccination and virus variants.
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Affiliation(s)
- Farid Samaan
- Grupo Hapvida-NotreDame Intermédica, São Paulo, SP, Brazil
- Instituto Dante Pazzanese de Cardiologia, São Paulo, SP, Brazil
- Secretaria de Estado da Saúde de São Paulo, São Paulo, SP, Brazil
| | | | - Renata Viana
- Instituto Dante Pazzanese de Cardiologia, São Paulo, SP, Brazil
| | - Lívia Gâmbaro
- Instituto Dante Pazzanese de Cardiologia, São Paulo, SP, Brazil
| | - Karlla Cunha
- Grupo Hapvida-NotreDame Intermédica, São Paulo, SP, Brazil
| | | | | | | | | | - Sylvia Aranha
- Imed Research Group, Hospital São Camilo Pompéia, São Paulo, SP, Brazil
| | | | - Roberta Pillar
- Unidade Assistencial Hospital Ipiranga, São Paulo, SP, Brazil
| | | | | | | | | | | | | | | | | | | | | | | | | | | | - Emmanuel Almeida Burdmann
- Laboratório de Investigação Médica (LIM 12), Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil
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Samaan F, Damiani BB, Kirsztajn GM, Sesso R. A Cross-Sectional Study on the Prevalence and Risk Stratification of Chronic Kidney Disease in Cardiological Patients in São Paulo, Brazil. Diagnostics (Basel) 2023; 13:diagnostics13061146. [PMID: 36980454 PMCID: PMC10047703 DOI: 10.3390/diagnostics13061146] [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] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/03/2023] [Accepted: 03/14/2023] [Indexed: 03/19/2023] Open
Abstract
Chronic kidney disease (CKD) provides a worse prognosis for patients with heart disease. In Latin America, studies that analyzed the prevalence and risk stratification of CKD in this population are scarce. We aimed to evaluate CKD prevalence and risk categories in patients of a public referral cardiology hospital in São Paulo, Brazil. This was a cross-sectional study based on a laboratory database. Outpatient serum creatinine and proteinuria results performed between 1 January 2021 and 31 December 2021 were analyzed. CKD was defined by estimated glomerular filtration rate (eGFR) <60 mL/min/1.73 m2 and proteinuria, by the albumin/creatinine ratio in a spot urine sample (UACR) >30 mg/g. A total of 36,651 adults were identified with serum creatinine levels (median age 72.4 [IQR, 51.0–73.6] years, 51% male). Among them, 51.9% had UACR dosage (71.5% with UACR < 30 mg/g, 22.6%, between 30–300 mg/g, and 5.9% with UACR > 300 mg/g). The prevalence of CKD was 30.9% (15.3% stage 3a, 10.2% stage 3b, 3.6% stage 4, and 1.7% stage 5), and the distribution of patients in the risk categories of the disease was: 52.0% with low-risk, 23.5%, moderate risk, 13.0%, high risk, and 11.2%, very high. In an outpatient setting, the prevalence of CKD in cardiological patients was almost three times (31%) that of the general population; about half of the individuals evaluated (48%) were not screened for an important risk marker (proteinuria), and approximately a quarter of these patients (24%) were in the high or very high CKD risk categories.
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Affiliation(s)
- Farid Samaan
- Research Division, Dante Pazzanese Cardiology Institute, São Paulo 04012-909, SP, Brazil;
- Correspondence:
| | - Bruna Bronhara Damiani
- Research Division, Dante Pazzanese Cardiology Institute, São Paulo 04012-909, SP, Brazil;
| | | | - Ricardo Sesso
- Nephrology Division, Universidade Federal de São Paulo, São Paulo 04023-900, SP, Brazil; (G.M.K.); (R.S.)
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Samaan F, Aoike D, Pagrion-Neto R, Cesar Pons T, Bracci Lisboa R, Burdmann EA. Medical students’ and health professionals’ knowledge regarding acute kidney injury: a cross-sectional study in the city of São Paulo, Brazil. Ren Fail 2022; 44:1660-1668. [DOI: 10.1080/0886022x.2022.2131575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Farid Samaan
- Instituto Dante Pazzanese de Cardiologia, São Paulo, Brazil
- LIM 12, Disciplina de Nefrologia, Universidade de São Paulo, São Paulo, Brazil
| | - Danilo Aoike
- Disciplina de Nefrologia, Universidade Federal de São Paulo, Brazil
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Samaan F, Gutierrez M, Kirsztajn GM, Sesso RC. Supply/demand ratio for medical consultations, diagnostic tests and chronic kidney disease monitoring in the Brazilian National Health System: a descriptive study, state of São Paulo, Brazil, 2019. Epidemiol Serv Saude 2022; 31:e20211050. [PMID: 35830061 PMCID: PMC9887954 DOI: 10.1590/s2237-96222022000200014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 04/22/2022] [Indexed: 02/02/2023] Open
Abstract
OBJECTIVE To determine the supply/demand ratio for procedures related to diagnosis and treatment for chronic kidney disease in the Brazilian National Health System (SUS), in the state of São Paulo, Brazil, 2019. METHODS This was a descriptive study, using data from the SUS outpatient and hospital information systems. The numbers of medical consultations, diagnostic and chronic kidney disease monitoring tests, performed in the period, were compared with the demand estimation, obtained through ministerial guidelines. RESULTS Exclusive SUS users were 28,791,244, and individuals with arterial hypertension and/or diabetes mellitus, 5,176,188. The number of procedures performed and the ratio between this number and the needs of the population were 389,414 consultations with nephrologists (85%); 11,540,371 serum creatinine tests (223%); 705,709 proteinuria tests (14%); 438,123 kidney ultrasounds (190%); and 1,045 kidney biopsies (36%). CONCLUSION In the chronic kidney disease care in the SUS it could be seen simultaneous existence of lack of supply, waste and inadequate screening of important procedures.
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Affiliation(s)
- Farid Samaan
- Secretaria de Estado da Saúde de São Paulo, Grupo de Planejamento e
Avaliação, São Paulo, SP, Brazil
| | - Marcelo Gutierrez
- Secretaria de Estado da Saúde de São Paulo, Grupo de Planejamento e
Avaliação, São Paulo, SP, Brazil
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Samaan F, Fernandes DE, Kirsztajn GM, Sesso R. The first appointment with a nephrologist: Brazilian patients' demographic and kidney function characteristics. A retrospective study. SAO PAULO MED J 2022; 140:366-371. [PMID: 35508000 PMCID: PMC9671261 DOI: 10.1590/1516-3180.2021.0194.r1.13082021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Accepted: 08/13/2021] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND The number of nephrologists has risen slowly, compared with the prevalence of chronic kidney disease (CKD) in Brazil. Data on patients referred to nephrology outpatient clinics remains scarce. OBJECTIVE To determine the demographic and kidney function characteristics of patients at their first appointment with a nephrologist. DESIGN AND SETTING Retrospective study conducted at three nephrology outpatient clinics (public and private services), in São Paulo, Brazil. METHODS From December 2019 to February 2020, we collected patient data regarding demographics, kidney function parameters and comorbidities. We then analyzed data on 394 patients who met a nephrologist for their first appointment. RESULTS The main comorbidities were hypertension (63.7%), diabetes (33.5%) and nephrolithiasis (22.3%). Regarding CKD stages, 24.1%, 9.1%, 13.7%, 15.2%, 15.2% and 2.3% of the patients were in stages 1, 2, 3a, 3b, 4 and 5, respectively. Proteinuria was absent or mild, moderate and high in 17.3%, 15.2% and 11.7%, respectively; and 16.2% had not undergone previous investigation of serum creatinine or proteinuria (55.8%). For 17.5%, referral to a nephrologist occurred late. Patients in public services were older than those in private services (59 years versus 51 years, respectively; P = 0.001), more frequently hypertensive (69.7% versus 57.5%; P = 0.01) and reached a nephrologist later (22.4% versus 12.4%; P = 0.009). CONCLUSION Referrals to a nephrologist were not being made using any guidelines for CKD risk and many cases could have been managed within primary care. Late referral to a nephrologist happened in one-fifth of the cases and more frequently in the public service.
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Affiliation(s)
- Farid Samaan
- MD, PhD. Nephrology Project Manager, Municipal Health Department of Santana de Parnaíba, Santana de Parnaíba (SP), Brazil; National Nephrology Coordinator, Grupo NotreDame Intermédica, São Paulo (SP), Brazil; Former Nephrology Coordinator, Hospital Leforte, São Paulo (SP), Brazil; and Postdoctoral Researcher, Department of Medicine, Universidade Federal de São Paulo (UNIFESP), São Paulo (SP), Brazil.
| | - Danilo Euclides Fernandes
- MD. Doctoral Student, Department of Medicine, Division of Nephrology, Universidade Federal de São Paulo (UNIFESP), São Paulo (SP), Brazil.
| | - Gianna Mastroianni Kirsztajn
- MD, PhD. Associate Professor of Medicine, Department of Medicine, Universidade Federal de São Paulo (UNIFESP), São Paulo (SP), Brazil.
| | - Ricardo Sesso
- MD, PhD. Full Professor of Medicine, Department of Medicine, Universidade Federal de São Paulo (UNIFESP), São Paulo (SP), Brazil.
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Samaan F, Carneiro de Paula E, de Lima Souza FBG, Mendes LFC, Rossi PRG, Freitas RAP, Nakagawa FT, Maciel AT, Aranha S, Osawa E, Konigsfeld HP, da Silva RG, de Souza RBC, Coutinho SM, Vieira TD, Thomaz KDB, Flato EMS, da Silva RC, Andrade LV, Badaoui M, Badaoui EP, Goes MÂ, do Amaral SH, Cunha K, Muniz IM, Sampaio JS, Durão Junior MDS, Zanetta DMT, Burdmann EA. COVID-19-associated acute kidney injury patients treated with renal replacement therapy in the intensive care unit: A multicenter study in São Paulo, Brazil. PLoS One 2022; 17:e0261958. [PMID: 35030179 PMCID: PMC8759670 DOI: 10.1371/journal.pone.0261958] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 12/15/2021] [Indexed: 12/29/2022] Open
Abstract
INTRODUCTION Multicenter studies involving patients with acute kidney injury (AKI) associated with the disease caused by the new coronavirus (COVID-19) and treated with renal replacement therapy (RRT) in developing countries are scarce. The objectives of this study were to evaluate the demographic profile, clinical picture, risk factors for mortality, and outcomes of critically ill patients with AKI requiring dialysis (AKI-RRT) and with COVID-19 in the megalopolis of São Paulo, Brazil. METHODS This multicenter, retrospective, observational study was conducted in the intensive care units of 13 public and private hospitals in the metropolitan region of the municipality of São Paulo. Patients hospitalized in an intensive care unit, aged ≥ 18 years, and treated with RRT due to COVID-19-associated AKI were included. RESULTS The study group consisted of 375 patients (age 64.1 years, 68.8% male). Most (62.1%) had two or more comorbidities: 68.8%, arterial hypertension; 45.3%, diabetes; 36.3%, anemia; 30.9%, obesity; 18.7%, chronic kidney disease; 15.7%, coronary artery disease; 10.4%, heart failure; and 8.5%, chronic obstructive pulmonary disease. Death occurred in 72.5% of the study population (272 patients). Among the 103 survivors, 22.3% (23 patients) were discharged on RRT. In a multiple regression analysis, the independent factors associated with death were the number of organ dysfunctions at admission and RRT efficiency. CONCLUSION AKI-RRT associated with COVID-19 occurred in patients with an elevated burden of comorbidities and was associated with high mortality (72.5%). The number of organ dysfunctions during hospitalization and RRT efficiency were independent factors associated with mortality. A meaningful portion of survivors was discharged while dependent on RRT (22.3%).
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Affiliation(s)
- Farid Samaan
- Department of High Complexity Patients, Grupo NotreDame Intermédica, São Paulo, Brazil
- Nephrology Division, University of São Paulo Medical School, São Paulo, Brazil
- Nephrology Division, Federal University of São Paulo, São Paulo, Brazil
- Planning and Evaluation Group, São Paulo State Health Department, São Paulo, Brazil
| | | | | | | | | | | | | | | | - Sylvia Aranha
- Imed Research Group, São Camilo Pompeia Hospital, São Paulo, Brazil
| | - Eduardo Osawa
- Imed Research Group, São Camilo Pompeia Hospital, São Paulo, Brazil
| | - Henrique Pinheiro Konigsfeld
- Nephrology Division, Santa Cruz Hospital, São Paulo, Brazil
- Nephrology Division, Sepaco Hospital, São Paulo, Brazil
| | - Riberto Garcia da Silva
- Nephrology Division, Santa Cruz Hospital, São Paulo, Brazil
- Nephrology Division, Sepaco Hospital, São Paulo, Brazil
| | | | - Saurus Mayer Coutinho
- Nephrology Division, Santa Cruz Hospital, São Paulo, Brazil
- Nephrology Division, Sepaco Hospital, São Paulo, Brazil
| | - Tales Dantas Vieira
- Department of High Complexity Patients, Grupo NotreDame Intermédica, São Paulo, Brazil
- Nephrology Division, Cruzeiro do Sul Hospital, Osasco, São Paulo, Brazil
| | | | | | | | - Lucas Vicente Andrade
- Department of General Surgery, Ipiranga Hospital Care Management Unit, São Paulo, Brazil
| | - Muna Badaoui
- Nephrology Division, University of São Paulo Medical School, São Paulo, Brazil
- Nephrology Division, Vila Nova Brasilândia Hospital, São Paulo, Brazil
| | - Eduardo Pogetti Badaoui
- Nephrology Division, University of São Paulo Medical School, São Paulo, Brazil
- Nephrology Division, Vila Nova Brasilândia Hospital, São Paulo, Brazil
| | - Miguel Ângelo Goes
- Department of High Complexity Patients, Grupo NotreDame Intermédica, São Paulo, Brazil
- Nephrology Division, Federal University of São Paulo, São Paulo, Brazil
| | - Sergio Henrique do Amaral
- Department of High Complexity Patients, Grupo NotreDame Intermédica, São Paulo, Brazil
- Medical Board, Bosque da Saúde Hospital, São Paulo, Brazil
| | - Karlla Cunha
- Department of High Complexity Patients, Grupo NotreDame Intermédica, São Paulo, Brazil
- Medical Board, Bosque da Saúde Hospital, São Paulo, Brazil
| | - Inês Marin Muniz
- Department of High Complexity Patients, Grupo NotreDame Intermédica, São Paulo, Brazil
| | - Jacqueline Siqueira Sampaio
- Department of High Complexity Patients, Grupo NotreDame Intermédica, São Paulo, Brazil
- Medical Board, Intermédica Guarulhos Hospital, Guarulhos, São Paulo, Brazil
| | - Marcelino de Souza Durão Junior
- Nephrology Division, Federal University of São Paulo, São Paulo, Brazil
- Nephrology Division, São Paulo Hospital, São Paulo, Brazil
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Samaan F, Fernandes DE, Kirsztajn GM, Sesso RDCC, Malik AM. Quality indicators for primary health care in chronic kidney disease in the public service of a city in the State of São Paulo, Brazil. CAD SAUDE PUBLICA 2022; 38:e00090821. [DOI: 10.1590/0102-311x00090821] [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] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 08/13/2021] [Indexed: 11/22/2022] Open
Abstract
Abstract: Complications of chronic kidney disease (CKD) can be avoided when promptly diagnosed and treated. The objective was to describe quality indicators of CKD detection and health care in the primary care public service of a city in the State of São Paulo, Brazil. This retrospective study analyzed charts of patients who attended primary care in the public service between November 2019 and February 2020. We selected 10 health quality indicators based on their scientific relevance and availability from the medical records that could express how CKD was identified and managed in primary health care. We estimated the adequate percentage of health indicators with data from 1,066 individuals who had ≥ one risk factor for CKD: hypertension, diabetes, or > 60 years old. Among patients, 79.4% had information on serum creatinine, whereas 58.8% were investigated for proteinuria. Blood pressure data were found in 98.9% of the records. The percentage of patients with blood pressure < 140x90mmHg, glycosylated hemoglobin < 6.5% and LDL-cholesterol < 100mg/dL was 79.2%, 49.2%, and 33.3%, respectively. Renin-angiotensin system blockers were prescribed to 82.8% of the patients with hypertension and CKD. Serum potassium was measured in 35.7% for those who were using renin-angiotensin system blockers. Among those people with CKD, 16.7% had CKD assigned in the medical records as a diagnose. Among those participants at higher risk for CKD, the referral rate to a nephrologist was 31.6%. This study confirmed some missed quality indicators of CKD in primary healthcare. Our results may help administrators develop public policies that improve health care for individuals at high risk for CKD. Long-term follow-up of the health indicators we proposed here will be useful to assess the impact of policy intervention.
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Samaan F, Carvalho AB, Pillar R, Rocha LA, Cassiolato JL, Cuppari L, Canziani MEF. The Effect of Long-Term Cholecalciferol Supplementation on Vascular Calcification in Chronic Kidney Disease Patients With Hypovitaminosis D. J Ren Nutr 2019; 29:407-415. [PMID: 30686750 DOI: 10.1053/j.jrn.2018.12.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 12/06/2018] [Accepted: 12/10/2018] [Indexed: 12/18/2022] Open
Abstract
OBJECTIVE The role of vitamin D supplementation on vascular calcification (VC) in patients with chronic kidney disease (CKD) is controversial. The objective of this study was to evaluate the effects of long-term cholecalciferol supplementation on VC in nondialysis patients with CKD stages 3-4 with hypovitaminosis D. DESIGN AND METHODS Eighty patients aged 18-85 years with creatinine clearance between 15 and 60 mL/min/1.73 m2 and serum 25(OH)D level < 30 ng/mL were enrolled in a 18-month prospective study. Individuals with vitamin D insufficiency (25-hydroxyvitamin D [25(OH)D] level between 16 and 29 ng/mL) were included in a randomized, double-blind, two-arm study to receive cholecalciferol or placebo. Patients with vitamin D deficiency [25(OH)D < 15 ng/mL] were included in an observational study and mandatorily received cholecalciferol. The coronary artery calcium score was obtained by multislice computed tomography at baseline and the 18th month. RESULTS During the study, VC did not change in the treated insufficient group (418 [81-611] to 364 [232-817] AU, P = 0.25) but increased in the placebo group (118 [37-421] to 199 [49-490] AU, P = 0.01). The calcium score change was inversely correlated with 25(OH)D change (r = -0.45; P = 0.037) in the treated insufficient group but not in the placebo group. Renal function did not change in the insufficient, treated, and placebo groups. In multivariate analysis, there was no difference in VC progression between the treated and placebo insufficient groups (interaction P = 0.92). In the deficient group, VC progressed (265 [84-733] to 333 [157-745] AU; P = 0.006) and renal function declined (33 [26-43] to 23 [17-49] mL/min/1.73 m2; P = 0.04). The calcium score change was inversely correlated with cholecalciferol cumulative doses (r = -0.41; P = 0.048) and kidney function change (r = -0.43; P = 0.033) but not with 25(OH)D change (r = -0.08; P = 0.69). CONCLUSION Vitamin D supplementation did not attenuate VC progression in CKD patients with hypovitaminosis D. CONCLUSION Vitamin D supplementation did not attenuate VC progression in CKD patients with hypovitaminosis D.
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Affiliation(s)
- Farid Samaan
- Nephrology Division, Federal University of São Paulo, São Paulo, Brazil
| | | | - Roberta Pillar
- Nephrology Division, Federal University of São Paulo, São Paulo, Brazil
| | - Lillian A Rocha
- Nephrology Division, Federal University of São Paulo, São Paulo, Brazil
| | | | - Lilian Cuppari
- Nephrology Division, Federal University of São Paulo, São Paulo, Brazil
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Sprung J, Samaan F, Hensler T, Atlee JL, Kampine JP. Excessive airway pressure due to ventilator control valve malfunction during anesthesia for open heart surgery. Anesthesiology 1990; 73:1035-8. [PMID: 2240655 DOI: 10.1097/00000542-199011000-00034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- J Sprung
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee 53226
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