Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 54
Filtrar
1.
BMC Anesthesiol ; 21(1): 261, 2021 10 29.
Artigo em Inglês | MEDLINE | ID: mdl-34715784

RESUMO

BACKGROUND: Intraoperative blood salvage (IBS) is regarded as an alternative to allogeneic blood transfusion excluding the risks associated with allogeneic blood. Currently, IBS is generally avoided in tumor surgeries due to concern for potential metastasis caused by residual tumor cells in the erythrocyte concentrate. METHODS: The feasibility, efficacy and safety aspects of the new developed Catuvab procedure using the bispecific trifunctional antibody Catumaxomab was investigated in an ex-vivo pilot study in order to remove residual EpCAM positive tumor cells from the autologous erythrocyte concentrates (EC) from various cancer patients, generated by a IBS device. RESULTS: Tumor cells in intraoperative blood were detected in 10 of 16 patient samples in the range of 69-2.6 × 105 but no residual malignant cells in the final erythrocyte concentrates after Catuvab procedure. IL-6 and IL-8 as pro-inflammatory cytokines released during surgery, were lowered in mean 28-fold and 52-fold during the Catuvab procedure, respectively, whereas Catumaxomab antibody was detected in 8 of 16 of the final EC products at a considerable decreased and uncritical residual amount (37 ng in mean). CONCLUSION: The preliminary study results indicate efficacy and feasibility of the new medical device Catuvab allowing potentially the reinfusion of autologous erythrocyte concentrates (EC) produced by IBS device during oncological high blood loss surgery. An open-label, multicenter clinical study on the removal of EpCAM-positive tumor cells from blood collected during tumor surgery using the Catuvab device is initiated to validate these encouraging results.


Assuntos
Anticorpos Biespecíficos/farmacologia , Molécula de Adesão da Célula Epitelial/metabolismo , Células Neoplásicas Circulantes/metabolismo , Recuperação de Sangue Operatório/instrumentação , Idoso , Eritrócitos/metabolismo , Estudos de Viabilidade , Humanos , Neoplasias/cirurgia , Recuperação de Sangue Operatório/métodos , Projetos Piloto
2.
Urology ; 135: 106-110, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31626857

RESUMO

OBJECTIVE: To examine long- and short-term outcomes using cell salvage with a commercially available leukocyte depletion filter following radical cystectomy in an oncologic population. MATERIALS AND METHODS: One hundred and fifty-seven patients, 87 of whom received a cell salvage transfusion, were retrospectively identified from chart review. Ninety-day outcomes as well as long-term mortality and cancer recurrence data were collected. Chi-square, Student's t, or Mann-Whitney U tests were used as appropriate. Multivariable regressions of survival were performed with a Cox proportional-hazards model. RESULTS: Those who received a cell salvage transfusion did not show any differences in rate of cancer recurrence (23%) vs those who did not receive a cell salvage transfusion (24%; P = .85). There were also no differences noted in mortality rates between the 2 populations (12% vs 17%; P = .36). Furthermore, no differences were noted in postoperative complication rates, length of hospital stay, 90-day culture positive infections or readmissions (P >.05). CONCLUSION: There are no significant differences in short-term or long-term patient outcomes between those who did and did not receive an intraoperative cell salvage transfusion. Cell salvage transfusions with a leukocyte depletion filter are safe and effective methods to reduce the need for allogeneic blood transfusions while controlling for the theoretical risk of metastatic spread.


Assuntos
Perda Sanguínea Cirúrgica/prevenção & controle , Transfusão de Sangue Autóloga/efeitos adversos , Cistectomia/efeitos adversos , Recidiva Local de Neoplasia/epidemiologia , Recuperação de Sangue Operatório/efeitos adversos , Neoplasias da Bexiga Urinária/cirurgia , Idoso , Idoso de 80 Anos ou mais , Transfusão de Sangue Autóloga/métodos , Feminino , Filtração/instrumentação , Seguimentos , Humanos , Tempo de Internação/estatística & dados numéricos , Procedimentos de Redução de Leucócitos/instrumentação , Leucócitos/patologia , Masculino , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/etiologia , Inoculação de Neoplasia , Recuperação de Sangue Operatório/instrumentação , Complicações Pós-Operatórias/epidemiologia , Complicações Pós-Operatórias/etiologia , Estudos Retrospectivos , Análise de Sobrevida , Resultado do Tratamento , Neoplasias da Bexiga Urinária/mortalidade , Neoplasias da Bexiga Urinária/patologia
4.
Can J Surg ; 61(2): 105-113, 2018 04.
Artigo em Inglês | MEDLINE | ID: mdl-29582746

RESUMO

BACKGROUND: Liver resection may be associated with substantial blood loss, and cell saver use has been recommended for patients at high risk. We performed a study to compare the allogenic erythrocyte transfusion rate after liver resection between patients who had intraoperative cell salvage with a cell saver device versus patients who did not. Our hypothesis was that cell salvage with autologous transfusion would reduce the allogenic blood transfusion rate. METHODS: Cell salvage was used selectively in patients at high risk for intraoperative blood loss based on preoperatively known predictors: right and repeat hepatectomy. Patients who underwent elective right or repeat hepatectomy between Nov. 9, 2007, and Jan. 27, 2016 were considered for the study. Data were retrieved from a liver resection database and were analyzed retrospectively. Patients with cell saver use (since January 2013) constituted the experimental group, and those without cell salvage (2007-2012), the control group. To reduce selection bias, we matched propensity scores. The primary outcome was the allogenic blood transfusion rate within 90 days postoperatively. Secondary outcomes were the number of transfused erythrocyte units, and rates of overall and infectious complications. RESULTS: Ninety-six patients were included in the study, 41 in the cell saver group and 55 in the control group. Of the 96, 64 (67%) could be matched, 32 in either group. The 2 groups were balanced for demographic and clinical variables. The allogenic blood transfusion rate was 28% (95% confidence interval [CI] 12.5%-43.7%) in the cell saver group versus 72% (95% CI 56.3%-87.5%) in the control group (p < 0.001). The overall and infectious complication rates were not significantly different between the 2 groups. CONCLUSION: Intraoperative cell salvage with autologous transfusion in elective right or repeat hepatectomy reduced the allogenic blood transfusion rate.


CONTEXTE: La résection hépatique peut s'accompagner de pertes sanguines importantes et l'utilisation d'un système de récupération de sang autologue est recommandée chez les patients à risque élevé. Nous avons procédé à une étude pour comparer le taux de transfusion de sang allogénique après la résection hépatique selon que les patients avaient ou non été soumis à une intervention de récupération de sang autologue. Notre hypothèse est que la récupération de sang autologue peropératoire pourrait réduire le taux de transfusion de sang allogénique. MÉTHODES: La récupération de sang autologue a été utilisée sélectivement chez des patients exposés à un risque élevé à l'égard de pertes sanguines peropératoires, en fonction de facteurs prédictifs préopératoires connus : hépatectomie droite et reprise de l'hépatectomie. Les patients ayant subi une intervention chirurgicale non urgente pour hépatectomie droite ou reprise d'hépatectomie entre le 9 novembre 2007 et le 27 janvier 2016 ont été considérés comme admissibles à l'étude. Les données ont été récupérées à partir d'une base de données sur la résection hépatique et analysées de manière rétrospective. Les patients soumis à la récupération de sang autologue (à partir de janvier 2013) ont constitué le groupe expérimental, et les autres (2007-2012) ont constitué le groupe témoin. Pour réduire le risque de biais de sélection, nous avons apparié les scores de propension. Le paramètre principal était le taux de transfusion de sang allogénique dans les 90 jours suivant l'opération. Les paramètres secondaires étaient le nombre d'unités transfusées, le taux de complications infectieuses et le taux global de complications. RÉSULTATS: Quatre-vingt-seize patients ont pris part à l'étude, 41 dans le groupe soumis à la récupération de sang autologue et 55 dans le groupe témoin. Parmi les 96 patients de l'étude, 64 (67 %) ont pu être assortis, 32 dans chaque groupe. Les 2 groupes étaient équilibrés aux plans des variables démographiques et cliniques. Le taux d'allotransfusions a été de 28 % (intervalle de confiance [IC] de 95 % 12,5 %-43,7 %) dans le groupe soumis à la récupération de sang autologue, contre 72 % (IC de 95 % 56,3 %-87,5 %) dans le groupe témoin (p < 0,001). Le taux de complications infectieuses et le taux global de complications n'ont pas été significativement différents entre les 2 groupes. CONCLUSION: La récupération de sang autologue peropératoire dans les cas d'hépatectomie droite ou d'hépatectomie répétée a réduit le taux de transfusion de sang allogénique.


Assuntos
Perda Sanguínea Cirúrgica/estatística & dados numéricos , Transfusão de Sangue Autóloga/estatística & dados numéricos , Transfusão de Eritrócitos/estatística & dados numéricos , Hepatectomia/estatística & dados numéricos , Hepatopatias/cirurgia , Recuperação de Sangue Operatório/estatística & dados numéricos , Avaliação de Resultados em Cuidados de Saúde/estatística & dados numéricos , Idoso , Idoso de 80 Anos ou mais , Estudos de Casos e Controles , Procedimentos Cirúrgicos Eletivos/estatística & dados numéricos , Feminino , Hepatectomia/métodos , Humanos , Masculino , Pessoa de Meia-Idade , Recuperação de Sangue Operatório/instrumentação , Pontuação de Propensão , Estudos Retrospectivos
5.
Blood Transfus ; 16(6): 498-501, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-29106356

RESUMO

BACKGROUND: The safety and effectiveness of cell salvage for vaginal delivery is unknown. This case series aimed to assess the utility and adverse events related to the use of cell salvage for maternal haemorrhage during vaginal delivery. MATERIALS AND METHODS: A cohort study design was chosen, focused on postpartum haemorrhages that occurred after vaginal delivery for which cell salvage equipment was requested to be set up in the labour and delivery room outside of a sterile operating room environment. Variables recorded included duration of stay in hospital, occurrence of wound infections, sepsis, thromboembolic events, and amniotic fluid embolism. RESULTS: Of 28 cases of postpartum haemorrhage during vaginal deliveries involving the setup or use of cell salvage equipment, ten were associated with successful re-infusion of salvaged shed blood. These ten cases were compared to the 18 cases in which cell salvage equipment was set up, but insufficient shed blood was salvaged for re-infusion. There were no instances of postpartum sepsis, wound infection, or thromboembolism associated with the use of cell salvage for vaginal delivery. Although one case of suspected amniotic fluid embolism occurred, severe symptoms began prior to the infusion of salvaged blood. DISCUSSION: Infusion of salvaged shed blood collected from a vaginal delivery field is feasible. The outcomes of these cases do not exclude an unacceptably high risk of infection or embolic events. Trials evaluating the safety and effectiveness associated with the use of cell salvage in vaginal deliveries are justified.


Assuntos
Transfusão de Sangue Autóloga , Parto Obstétrico , Recuperação de Sangue Operatório/métodos , Hemorragia Pós-Parto/terapia , Adulto , Feminino , Humanos , Recuperação de Sangue Operatório/efeitos adversos , Recuperação de Sangue Operatório/instrumentação
6.
J R Army Med Corps ; 164(2): 96-102, 2018 May.
Artigo em Inglês | MEDLINE | ID: mdl-29079661

RESUMO

INTRODUCTION: Uncontrolled haemorrhage is the leading cause of death on the battlefield, and two-thirds of these deaths result from non-compressible haemorrhage. Blood salvage and autotransfusion represent an alternative to conventional blood transfusion techniques for austere environments, potentially providing blood to the casualty at point of injury. The aim of this paper is to describe the design, development and initial proof-of-concept testing of a portable blood salvage and autotransfusion technology to enhance survivability of personnel requiring major medical interventions in austere or military environments. METHOD: A manually operable, dual-headed pump was developed that removes blood from site of injury to a collection reservoir (upper pump) and back to casualty (lower pump). Theoretical flow rate calculations determined pump configuration and a three-dimensionally printed peristaltic pump was manufactured. Flow rates were tested with fresh bovine blood under laboratory conditions representative of the predicted clinical environment. RESULTS: Mathematical modelling suggested flow rates of 3.6 L/min and 0.57 L/min for upper and lower pumps. Using fresh bovine blood, flow rates produced were 2.67 L/min and 0.43 L/min. To mimic expected battlefield conditions, upper suction pump flow rate was calculated using a blood/air mixture. CONCLUSION: The authors believe that this technology can potentially enhance survivability for casualties in austere and deployed military settings through autotransfusion and cell concentration. It reduces negative effects of blood donation on the conventional donor pool, and potentially negates the logistical constraints associated with allogenic transfusions.


Assuntos
Transfusão de Sangue Autóloga/instrumentação , Hemorragia/terapia , Medicina Militar/instrumentação , Militares , Recuperação de Sangue Operatório/instrumentação , Medicina Selvagem/instrumentação , Animais , Bovinos , Desenho de Equipamento , Humanos , Modelos Teóricos , Sistemas Automatizados de Assistência Junto ao Leito , Estudo de Prova de Conceito
7.
Interv Neuroradiol ; 23(5): 531-537, 2017 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-28732458

RESUMO

Background The endovascular therapy for cerebral venous sinus thrombosis (CVST) is currently accepted as a second-line treatment for patients who have failed or those in whom systemic anticoagulation is contraindicated or in a subgroup of patients presenting with rapid neurologic deterioration. A number of different mechanical and pharmacologic endovascular strategies have been reported, either as separate or combined approaches. These new catheters and aspiration systems have a high power and vacuum capacity, which carries a risk of anemization of the patient and hypovolemic shock, being necessitating the transfusion of the patient. Material and methods Because of the problems that donor blood transfusion can bring, we describe the use of a Sorin Xtra® Autotransfusion System (ATS). This complete autologous blood recovery system was designed for use in procedures where medium- to high-volume blood loss occurs, such as major surgeries. We have adapted it to recover all the blood aspirated during the mechanical thrombectomy procedures of the dural cerebral venous sinuses, since they are procedures that can cause a significant loss of blood. One advantage to this is the patient receives his or her own blood instead of donor blood, so there is no risk of contracting outside diseases or transfusion reactions. Conclusions This technical note describes a novel and previously unpublished technical approach to CVST that can be immediately applied to clinical practice. It also raises awareness among the interventional neuroradiologist and anesthesiologist communities about novel, potentially lifesaving endovascular treatments in patients with extensive CVST.


Assuntos
Transfusão de Sangue Autóloga/instrumentação , Recuperação de Sangue Operatório/instrumentação , Trombose dos Seios Intracranianos/terapia , Trombectomia/métodos , Angiografia Cerebral , Terapia Combinada , Traumatismos Craniocerebrais/complicações , Feminino , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Trombose dos Seios Intracranianos/diagnóstico por imagem , Trombose dos Seios Intracranianos/etiologia , Tomografia Computadorizada por Raios X , Adulto Jovem
8.
Vox Sang ; 112(6): 499-510, 2017 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-28580663

RESUMO

Almost 150 years after the first autologous blood transfusion was reported, intraoperative blood salvage has become an important method of blood conservation. The primary goal of autologous transfusion is to reduce or avoid allogeneic red blood cell transfusion and the associated risks and costs. Autologous salvaged blood does not result in immunological challenge and its consequences, provides a higher quality red blood cell that has not been subjected to the adverse effects of blood storage, and can be more cost-effective than allogeneic blood when used for carefully selected surgical patients. Cardiac, orthopaedic and vascular surgery procedures with large anticipated blood loss can clearly benefit from the use of cell salvage. There are safety concerns in cases with gross bacterial contamination. There are theoretical safety concerns in obstetrical and cancer surgery; however, careful cell washing as well as leucoreduction filters makes for a safer autologous transfusion in these circumstances. Further studies are needed to determine whether oncologic outcomes are impacted by transfusing salvaged blood during cancer surgery. In this new era of patient blood management, where multimodal methods of reducing dependence on allogeneic blood are becoming commonplace, autologous blood salvage remains a valuable tool for perioperative blood conservation. Future studies will be needed to best determine how and when cell salvage should be utilized along with newer blood conservation measures.


Assuntos
Transfusão de Sangue Autóloga/métodos , Recuperação de Sangue Operatório/instrumentação , Perda Sanguínea Cirúrgica , Transfusão de Sangue Autóloga/efeitos adversos , Transfusão de Sangue Autóloga/economia , Análise Custo-Benefício , Humanos , Recuperação de Sangue Operatório/métodos
9.
J Extra Corpor Technol ; 49(2): 107-111, 2017 06.
Artigo em Inglês | MEDLINE | ID: mdl-28638159

RESUMO

Use of autotransfusion systems to collect, wash, and concentrate shed blood during surgical procedures is a widely used method for reducing postoperative anemia and the need for blood transfusions. The aim of this study was to evaluate the CATSmart Continuous Autotransfusion System wash program performance with small (200 or 700 mL) and large volumes (1,000 mL) of shed blood and to determine non-inferiority of the CATSmart to the C.A.T.S plus system. Human whole blood was collected in citrate phosphate dextrose, diluted, and divided into two aliquots to be processed as a pair using the C.A.T.S plus and CATSmart systems with their corresponding wash programs: low-volume, high quality/smart, or emergency wash. Final packed red cell product was analyzed for red blood cell (RBC), white blood cell, and platelet counts; hemoglobin; hemolysis; RBC recovery rates; and elimination of albumin, total protein, and potassium. The mean hematocrit (HCT) after processing with CATSmart and C.A.T.S plus systems were 59.63% and 57.71%, respectively. The calculated overall RBC recovery rates on the CATSmart and C.A.T.S plus systems were 85.41% and 84.99%, respectively. Elimination of albumin (97.5%, 98.0%), total proteins (97.1%, 97.5%), and potassium (92.1%, 91.9%) were also calculated for the CATSmart and C.A.T.S plus systems. The CATSmart and C.A.T.S plus systems both provided a high-quality product in terms of HCT, protein elimination, and hemolysis rates across the range of tested shed blood volumes and all wash programs. The study was able to confirm the CATSmart is non-inferior to the C.A.T.S plus system.


Assuntos
Células Sanguíneas/citologia , Remoção de Componentes Sanguíneos/instrumentação , Transfusão de Sangue Autóloga/instrumentação , Recuperação de Sangue Operatório/instrumentação , Robótica/instrumentação , Manejo de Espécimes/instrumentação , Sangue , Transfusão de Sangue Autóloga/métodos , Desenho de Equipamento , Análise de Falha de Equipamento , Humanos
10.
Transfusion ; 57(3): 589-598, 2017 03.
Artigo em Inglês | MEDLINE | ID: mdl-28233319

RESUMO

BACKGROUND: Cell salvage is an essential element in the concept of blood management. Modern devices provide different bowl sizes and sensor-directed programs to optimally adjust to varying clinical situations. STUDY DESIGN AND METHODS: In an experimental performance study, the discontinuous autotransfusion device XTRA (LivaNova/Sorin) was evaluated using fresh donor blood anticoagulated with heparin 5 U/mL and adjusted to a hematocrit of 10% or 25%, representing orthopedic or cardiac surgery. Test blood was processed with the autotransfusion device XTRA in four different bowls (55 mL, 125 mL, 175 mL, and 225 mL) and in three different program modes (a standard program, an optimized program, and an emergency program). RESULTS: Processing speed increased with bowl size and with the emergency program (range, 6.4-29.8 mL red blood cells [RBCs]/min). The RBC recovery rate exceeded 90% for all bowls and programs except the 55-mL bowl with the emergency program. Plasma elimination exceeded 95% for all bowls and programs except the 225-mL bowl with the emergency and standard programs. Maximal RBC recovery (range, 94.7%-97.6%) and plasma elimination (range, 98.7%-99.5%) were obtained with the medium-sized bowls (125 mL and 175 mL) and the optimized program. Elimination rates for potassium or plasma free hemoglobin were consistently lower than for protein or albumin and were highest for heparin. CONCLUSIONS: Increased hematocrit and RBC recovery rates are obtained with the optimized program Popt with the discontinuous autotransfusion device. The emergency program Pem speeds up the process but leads to RBC loss and reduced plasma elimination rates; therefore, it should be restricted to emergency situations. All four different sized bowls have high performance. Plasma elimination is represented best by protein or albumin elimination rates.


Assuntos
Transfusão de Sangue Autóloga , Recuperação de Sangue Operatório , Procedimentos Ortopédicos , Software , Transfusão de Sangue Autóloga/instrumentação , Transfusão de Sangue Autóloga/métodos , Feminino , Hematócrito , Humanos , Masculino , Recuperação de Sangue Operatório/instrumentação , Recuperação de Sangue Operatório/métodos
12.
J Extra Corpor Technol ; 48(4): 168-172, 2016 12.
Artigo em Inglês | MEDLINE | ID: mdl-27994256

RESUMO

Autotransfusion protocols often use the use of costly filters, such as leukocyte-depleting filters (LDFs), to minimize reinfusion of activated leukocytes and inflammatory mediators associated with reperfusion injury (RI). LDFs are used extensively in hospital settings; however, they represent an additional capital expenditure for hospitals, as well as a constraint on the reinfusion rate of blood products for health-care providers. We compared a commonly used LDF to a novel centrifugation method employing a widely used cell salvage device. Complete blood counts and enzyme-linked immunosorbent assays (ELISAs) measuring tumor necrosis factor-α (TNF-α) and interleukin-2 (IL-2) were performed to compare the efficacy of these methodologies. The LDF removed, on average, 94% of all leukocytes, including 96% of neutrophils. The centrifugation method removed, on average, 89% of all leukocytes, including 91% of neutrophils and resulted in a highly concentrated red blood cell product. Our results suggest both methods offer equivalent leukocyte reduction. TNF-α was also comparably reduced following our novel centrifugation method and the LDF method and IL-2 levels were undetectable in all samples. These results indicate our novel centrifugation method may preclude the need for a LDF during select autotransfusion applications.


Assuntos
Transfusão de Sangue Autóloga/instrumentação , Centrifugação/instrumentação , Procedimentos de Redução de Leucócitos/instrumentação , Leucócitos/citologia , Recuperação de Sangue Operatório/instrumentação , Ultrafiltração/instrumentação , Animais , Transfusão de Sangue Autóloga/métodos , Bovinos , Células Cultivadas , Desenho de Equipamento , Análise de Falha de Equipamento , Contagem de Leucócitos
13.
BMC Anesthesiol ; 16(1): 37, 2016 07 15.
Artigo em Inglês | MEDLINE | ID: mdl-27418211

RESUMO

BACKGROUND: Blood salvage systems help to minimize intraoperative transfusion of allogenic blood. So far no data is available on the use of argatroban for anticoagulation of such systems. We conducted an ex-vivo trial to evaluate the effectiveness of three different argatroban doses as compared to heparin and to assess potential residual anticoagulant in the red cell concentrates. METHODS: With ethical approval and individual informed consent, blood of 23 patients with contraindications for use of blood salvage systems during surgery was processed by the Continuous-Auto-Transfusion-System (C.A.T.S. ® Cell Saver System, Fresenius Kabi, Bad Homburg, Germany) using 5,50 or 250 mg of argatroban or 25.000 U of heparin in 1000 ml saline for anticoagulation of the system. Emergency and high-quality washing modes were applied in random order. Patency of the system and residual amount of anticoagulants in the re-transfusion bag were measured. The collected blood was not re-infused, but only used for analysis of hematocrit, heparin and argatroban concentrations. RESULTS: Patency of the system was provided by all anticoagulants except for 3/8 cases with 5 mg of argatroban. Residual anticoagulant was found in 2/10 (20 %) heparin samples in two different patients (1 emergency and 1 high-quality washing) and in all argatroban samples. High quality washing eliminated 89-95 % and emergency washing 60-90 % of the initial argatroban concentration. Residual argatroban concentrations ranged from 55 ng ml(-1) to 6810 ng ml(-1), with initial argatroban concentrations of 5 and 250 mg, respectively. CONCLUSION: The C.A.T.S. does not reliably remove heparin and should therefore not be used in HIT patients. Anticoagulation with 50 and 250 mg argatroban, maintains the systems patency and is significantly removed during washing. In this ex-vivo study a concentration of 50 µg ml(-1) argatroban provided the best ratio of system patency and residual argatroban concentration. Additional dose-finding studies with different blood salvage systems are needed to evaluate the optimal argatroban concentration.


Assuntos
Transfusão de Sangue/métodos , Recuperação de Sangue Operatório/métodos , Ácidos Pipecólicos/sangue , Adulto , Idoso , Idoso de 80 Anos ou mais , Anticoagulantes/sangue , Arginina/análogos & derivados , Coagulação Sanguínea/efeitos dos fármacos , Relação Dose-Resposta a Droga , Feminino , Hematócrito/estatística & dados numéricos , Heparina/efeitos adversos , Heparina/sangue , Heparina/farmacocinética , Humanos , Técnicas In Vitro , Masculino , Pessoa de Meia-Idade , Recuperação de Sangue Operatório/instrumentação , Ácidos Pipecólicos/farmacocinética , Sulfonamidas , Trombocitopenia/induzido quimicamente , Trombocitopenia/cirurgia
14.
Transfusion ; 56(1): 153-9, 2016 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-26331951

RESUMO

BACKGROUND: Fat in wound blood observed in orthopedic or cardiac surgery might pose a risk for fat embolism during blood salvage. Fat removal was optimized in the washing process. STUDY DESIGN AND METHODS: In an experimental study blood from fresh donations was adjusted to a hematocrit (Hct) of 25% and an admixture of 1.25% human tissue fat. This blood was processed with the cell salvage device XTRA in a modified program mode. Volumetric quantification of fat was performed after centrifugation of blood samples in Pasteur pipettes. From the volumes, the Hct levels and the concentrations of fat and other variables elimination rates and RBC recovery were calculated. RESULTS: Pretests showed wash volume, wash flow, and process interruptions affecting fat elimination. With the new optimized fat elimination program Pfat removal rate of fat increased to 98.5 ± 0.9% for the 225-mL bowl. The product had a mean Hct of 48.7 ± 1.2% and a RBC recovery rate of 93.5 ± 2.3%. The program conserved the high elimination rates for albumin, heparin, potassium, and free plasma hemoglobin (98.8, 99.3, 95.3, and 94.9%, respectively). Similar high fat removal was also observed with bowls of smaller size, namely, 98.1% for the 175-mL bowl and 98.2% for the 125- and the 55-mL bowls. With test blood of Hct 10% a mean fat elimination of 99.6 ± 01% was observed. CONCLUSIONS: A special program modification Pfat involving extra washing and RBC concentration steps significantly improves fat removal by the Latham bowl-based autotransfusion device XTRA, thus yielding results equivalent to the continuous cell salvage system.


Assuntos
Tecido Adiposo , Remoção de Componentes Sanguíneos/instrumentação , Transfusão de Sangue Autóloga/instrumentação , Recuperação de Sangue Operatório/instrumentação , Remoção de Componentes Sanguíneos/métodos , Transfusão de Sangue Autóloga/métodos , Humanos , Recuperação de Sangue Operatório/métodos
15.
Rev Med Chir Soc Med Nat Iasi ; 120(3): 587-91, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-30141942

RESUMO

The management of blood loss in primary hip arthroplasty is a controversial topic. Aim: To evaluate the efficacy of reinfusion drains in terms of hemoglobin levels and volume of red blood cell transfused postoperatively. Material and Methods: 295 patients who underwent primary hip arthroplasty were retrospectively assessed. After applying the exclusion criteria, 94 patients were included in the study and were divided into two groups: 45 patients received a reinfusion drain and 49 a suction drain. The following were analyzed: demographic characteristics of patients, preoperative hemoglobin level, 12-h and 24-h postoperative hemoglobin levels and their variations, number of transfused units of packed red blood cells, and postoperative complications. Results: Kruskal Wallis analysis revealed the homogeneity of the study groups (Chi-square=2.40, df=2, p=0.301). A statistically significant lower decline in mean Hb24 was found in suction drain group (p=0.001). Kruskal Wallis test revealed a significantly more frequent postoperative use of a higher number of packed red blood cell units in the suction drain group (Chi-square=28.70, df=2, p=0.001) compared to reinfusion drain group. Conclusions: We failed to demonstrate the superiority of reinfusion drains versus suction drains in maintaining hemoglobin levels.


Assuntos
Artroplastia de Quadril , Perda Sanguínea Cirúrgica , Transfusão de Sangue Autóloga , Transfusão de Eritrócitos/estatística & dados numéricos , Hemoglobina A/análise , Recuperação de Sangue Operatório/instrumentação , Adulto , Idoso , Idoso de 80 Anos ou mais , Drenagem , Estudos de Viabilidade , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Estatísticas não Paramétricas
16.
Innovations (Phila) ; 10(5): 334-41, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26418303

RESUMO

OBJECTIVE: Cell Saver system is the method of choice for red blood cell salvage from the surgical field; however, cost is a limiting factor. We at our institute have devised a cost-effective version of dialyser-based autotransfusion system. We performed pretransfusion comparison of our autotransfusion system with conventional cell saver system. METHODS: A prospective randomized observational study was performed in 104 consecutive patients with coronary artery disease undergoing by off-pump coronary artery bypass grafting. Patients were divided into two groups. In the dialyser group (53 patients), blood from surgical field was salvaged by our dialyser-based system. In the cell saver group (51 patients), blood was salvaged by cell saver. In both groups, 20-mL sample from the salvaged blood was analyzed for hemoglobin, platelets, protein, albumin, free hemoglobin, osmotic fragility, and peripheral blood smear examination. RESULTS: Total hemoglobin salvaged was comparable in both groups (85% vs 76%). On peripheral smear, red blood cells were swollen, but morphology was preserved. Moreover, normal osmotic fragility suggested absence of any lethal damage to red blood cells in either group. Dialyser-based system was more efficient in salvaging platelets (42.9% vs 6%), proteins (79.2% vs 0%), and albumin (65% vs 0%). Total free hemoglobin was three times more in dialyser group but was well below recommended limits. CONCLUSIONS: Dialyser-based system is economical, is equally efficacious in salvaging red blood cells, is more effective in salvaging platelets and proteins, and does not contain significant amount of free hemoglobin. Therefore, this salvaged blood can be safely transfused.


Assuntos
Transfusão de Sangue Autóloga/métodos , Recuperação de Sangue Operatório/métodos , Diálise Renal/métodos , Plaquetas , Proteínas Sanguíneas/análise , Transfusão de Sangue Autóloga/instrumentação , Ponte de Artéria Coronária/métodos , Eritrócitos , Feminino , Hemoglobinas/análise , Humanos , Masculino , Pessoa de Meia-Idade , Recuperação de Sangue Operatório/instrumentação , Assistência Perioperatória/métodos , Diálise Renal/instrumentação , Albumina Sérica/análise
19.
PLoS One ; 10(6): e0130864, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26098626

RESUMO

BACKGROUND: Intraoperative blood salvage, an effective blood conservation strategy, has not been applied in onco-surgery, because of potential malignant cell contamination. In this study we tested effectiveness of a modified leukocyte depletion filter (M-LDF) for removal of tumor cells. MATERIALS AND METHODS: The effects of M-LDF and regular LDF on removal of cells (HepG2 cell line) were compared. The safety of M-LDF was tested with blood (collected and washed during onco-surgery), the salvaged blood mixed with tumor cells from the solid tumor of the same patient, or mixed with HepG2 cells (n=30 in each protocol). Cancer cells were identified by flow cytometry, culture and bioassay with and without filtration. RESULTS: M-LDF removed 5-log of HepG2 and nucleated cells, which was much higher than regular LDF, and cells were destroyed when they passed through M-LDF. Cytokeratin-positive cells in all samples were removed by M-LDF. Invasive growth adherent cells were found in most of unfiltered samples and 67% of the inoculated nude mice developed tumors in LDF-treated sample. Neither adherent cells nor nude mice developed tumors were found in M-LDF-treated samples. DISCUSSION AND CONCLUSION: Since M-LDF can effectively remove and destroy cancer cells in the salvaged blood, it has great potential for clinical application.


Assuntos
Filtração/instrumentação , Procedimentos de Redução de Leucócitos/instrumentação , Células Neoplásicas Circulantes , Recuperação de Sangue Operatório/instrumentação , Animais , Citometria de Fluxo , Células Hep G2 , Humanos , Camundongos , Recuperação de Sangue Operatório/métodos
20.
Exp Clin Transplant ; 13 Suppl 1: 315-7, 2015 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-25894181

RESUMO

OBJECTIVES: Liver transplant currently is the best treatment option for end-stage liver disease. During liver transplant, there is major blood loss due to surgery and primary disease. By using a cell saver, the need for blood transfusion is markedly reduced. In this study, we aimed to evaluate the efficacy of cell saver use on morbidity and mortality in living-donor liver transplant. MATERIALS AND METHODS: We retrospectively evaluated 178 living-donor liver transplants, performed from 2005 to 2013 in our center. Child-Turcotte-Pugh A patients, deceased-donor liver transplants, and liver transplants performed for fulminant hepatic failure were not included in this study. Intraoperative blood transfusion was done in all patients to keep hemoglobin level between 10 and 12 g/dL. Cell saver was used in all liver transplants except in patients with malignancy, hepatitis B, and hepatitis C. RESULTS: We included 126 patients in the study. Cell saver was used in 84 liver transplants (66%). In 42 patients (34%), liver transplant was performed without a cell saver. In living-donor liver transplant with cell saver use, 10 mL/kg blood (range, 2-50 mL/kg blood) was transfused from the cell saver; in addition, 5 to 10 mL/kg allogeneic blood was transfused. In living-donor liver transplant without cell saver, 20 to 25 mL/kg allogeneic blood was transfused. CONCLUSIONS: During liver transplant, major blood transfusion is needed because of surgery and primary disease. Cell saver use markedly decreases the need for allogeneic blood transfusion and avoids adverse events of massive transfusion.


Assuntos
Perda Sanguínea Cirúrgica/prevenção & controle , Transfusão de Sangue Autóloga/instrumentação , Doença Hepática Terminal/cirurgia , Transplante de Fígado/instrumentação , Recuperação de Sangue Operatório/instrumentação , Perda Sanguínea Cirúrgica/mortalidade , Transfusão de Sangue Autóloga/efeitos adversos , Transfusão de Sangue Autóloga/métodos , Transfusão de Sangue Autóloga/mortalidade , Doença Hepática Terminal/diagnóstico , Doença Hepática Terminal/mortalidade , Desenho de Equipamento , Feminino , Humanos , Transplante de Fígado/efeitos adversos , Transplante de Fígado/métodos , Transplante de Fígado/mortalidade , Masculino , Recuperação de Sangue Operatório/efeitos adversos , Recuperação de Sangue Operatório/métodos , Recuperação de Sangue Operatório/mortalidade , Estudos Retrospectivos , Resultado do Tratamento , Adulto Jovem
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA