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 685,946 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Leukaemia and its associated therapy result in pathophysiological peculiarities relevant to anaesthesia. Leukaemic patients suffer from anaemia, coagulation disorders, and the consequences of immunosuppression. In addition, some patients show infiltrations of the oropharynx, potentially resulting in difficult intubation and/or pharyngeal haemorrhage. Mediastinal masses can induce complete airway obstruction during general anaesthesia. Patients with a white blood cell count (WBC) greater than 100,000/mm3 (hyperleukocytosis) can suffer from the leukostasis syndrome with acute respiratory failure as well as cerebral vascular occlusions and bleeding due to increased blood viscosity and disturbed microvascular perfusion. Since this syndrome may be triggered by surgery, the WBC should be reduced prior to general anaesthesia in patients with hyperleukocytosis. To avoid development of the leukostasis syndrome, transfusion of packed red cells should be restricted in these patients. Hyperleukocytosis can simulate in-vitro hypoxaemia due to the excessive oxygen consumption of the mass of leukaemic blood cells during routine blood gas analysis. Therapy of leukaemia can lead to the tumor-lysis syndrome with hyperuricaemia, hyperphosphataemia, hyperkalaemia, hypocalcaemia, and hypoglycaemia, and may induce acute renal failure. Since drug interactions have only been evaluated for the combination of two or three drugs, interactions of cytotoxic agents with anaesthetics can hardly be predicted because of the large number of drugs simultaneously administered to leukaemic patients. The heart and lungs are target organs for the acute or chronic side effects of cytotoxic drugs, resulting in non-cardiogenic pulmonary oedema (e.g., cytosine-arabinoside), lung fibrosis (e.g., bleomycin), or arrhythmias and cardiac failure (e.g., adriamycin). The severity of these side effects depends on pre-existing organ disease and only in part on drug dosage. Only HLA- and CMV-compatible blood components should be administered to leukaemic patients. Hyperleukocytosis and the first days of cytotoxic treatment represent relative contraindications to general anaesthesia.
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PMID:[Pathophysiologic and anesthesiologic characteristics of patients with leukemia]. 152 54

The relationship between oxygen consumption (VO2) and oxygen delivery (DO2) is of interest in critically ill patients. Various studies of these parameters have resulted in different concepts for optimizing DO2 and VO2. During liver transplantation without anhepatic veno-venous bypass, caval cross-clamping initiates a series of haemodynamic and metabolic alterations including the rapid change from hyperdynamic to hypodynamic conditions. In addition, simultaneous changes in DO2 and VO2 occur in these patients. The goal of our present study was to test the clinical relevance of therapeutic interventions based on metabolic monitoring in patients with terminal liver disease undergoing orthotopic liver transplantation. PATIENTS AND METHODS. One hundred sixty-two consecutive patients were evaluated. According to outcome, patients were divided into survivors (n = 115, group A), nonsurvivors (n = 30, group B), and patients with primary nonfunction of the liver graft (n = 17, group C). One hundred twenty patients were cirrhotics due to either alcohol (n = 36), aggressive hepatitis (n = 30), or biliary cirrhosis (n = 54); 42 had a neoplastic disease. Haemodynamic measurements, data for calculations of DO2 and VO2, and blood samples for arterial and mixed-venous blood gases and subsequent laboratory analysis were taken during the surgical procedure at six timepoints: after induction of anaesthesia (I); during preparation of the recipient liver, before cross-clamping (II); 10 min after clamping of the inferior vena cava (III); 10 min before unclamping (IV); with all vessels open, 10 min after declamping during reperfusion (V); and 60 min after declamping (VI). Anaesthesia was induced with thiopentone (3-5 mg/kg i.v.) and fentanyl (15 micrograms/kg min i.v.). Muscle relaxation was achieved with pancuronium (0.1 mg/kg i.v.). Anaesthesia was maintained with i.v. supplements of fentanyl (5-10 micrograms/kg) and pancuronium (4 mg) as required. Volume-cycled ventilation was established with a mixture of O2 in air with a positive end-expiratory pressure of 5 mm H2O to keep the PaO2 above 100 mm Hg and the PaCO2 around 35 mm Hg (Servo 900 C-Ventilator, Siemens). To maintain body temperature, all patients were positioned on a heating blanket set at 38 degrees C. The inspired gases were warmed and humidified using a dual servo-heated humidifier. Mannitol (20-40 g i.v.) or sorbitol (16-24 g i.v.) was given to prevent renal dysfunction during the cross-clamping procedure. Lactated Ringer's solution and fresh frozen plasma administration was guided by cardiovascular performance and requirements for clotting factors, respectively. Cardiac output was measured by the thermodilution method using a pulmonary artery catheter. Blood lactate, haemoglobin concentration, arterial and mixed-venous oxygen content, and oxygen saturation were measured (Hemoxymeter OSM3). VO2 and DO2 were calculated according to standard formulas. STATISTICAL ANALYSIS. The data from groups A, B, and C were compared using a multivariate analysis of variance with Tukey's method for multiple comparisons. A least-square regression was used to correlate metabolic data. RESULTS. The perioperative course of the determinants of oxygen transport is shown in Table 1. After cross-clamping, the cardiac index (CI) decreased in groups A (47%), B (53%), and C (51%) and increased to pre-anhepatic levels after reperfusion of the new liver. This was associated with distinct decreases in DO2 (A: 42%, B: 47%, and C: 45%) and VO2 (A: 8%, B: 19%, C: 25%). After reperfusion of the new allograft (V), VO2 increased in groups A (24%) and B (18%) as compared to controls (I). By contrast, in group C, a distinct further decrease in VO2 (13%) was detected. In these patients, there was a significantly greater increase in mixed-venous saturation accompanied by a further decrease in body temperature. As shown in Figures 1 and 2, no significant relationship was found between O2 transport, VO2, and blood lactate. DISC
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PMID:[Anesthesia-relevant changes in metabolic parameters with different circulatory and liver functions]. 152 56

Fifty-three patients with suspected gallbladder carcinoma underwent ultrasonography and laparoscopy. Laparoscopy correctly excluded malignancy in five patients when ultrasonography had suggested gallbladder neoplasia. Of 48 patients with gallbladder carcinoma, laparoscopy identified 46 (95.8%) as compared with 30 (62.5%) by ultrasonography (p less than 0.001). Distant metastases in the liver, parietal peritoneum, or omentum were present in 41 patients (85.4%) and were detected by laparoscopy in 39 (sensitivity 95%) and by ultrasonography in 21 (sensitivity 51.2%) (p less than 0.001). Combination of ultrasonography and laparoscopy improved the overall diagnostic accuracy to 100%. Laparoscopy provided histological diagnosis of the disease in 36 patients (75%) and circumvented unnecessary laparotomy in 40 (83.3%) patients by revealing advanced or associated disease. When laparoscopy suggested that the disease was localized, the diagnosis was correct in 83.3% (5 of 6) patients. Laparoscopy under local anesthesia is useful in the diagnosis and staging of gallbladder carcinoma, and therefore helpful in planning management.
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PMID:Laparoscopy in primary carcinoma of the gallbladder. 153 59

Twelve patients underwent surgical removal of pheochromocytoma under enflurane anesthesia. Changes in systemic and pulmonary hemodynamics and plasma catecholamine level were studied during anesthesia. Anesthesia was slowly induced by face mask with nitrous oxide and enflurane with minimal circulatory changes. Tracheal intubation was smoothly performed using pancuronium or vecuronium without excessive catecholamine release and elevation of blood pressure. Although enflurane anesthesia did not inhibit catecholamine release during tumor manipulation, blood pressure and heart rate were controlled successfully with vasodilators such as phentolamine, prostaglandin E1 and nicardipine, and antiarrhythmic agents such as propranolol and lidocaine. We conclude that enflurane is an agent of choice for the resection of pheochromocytoma.
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PMID:[Hemodynamic and catecholamine responses during enflurane anesthesia for pheochromocytoma]. 155 57

To determine the safety, diagnostic value, and clinical outcome of patients with malignancy undergoing subxiphoid pericardiotomy for large pericardial effusions, we prospectively studied 25 consecutive patients with malignancy and new, large pericardial effusions diagnosed by echocardiography. Twenty-two of the 25 operations were done under local anesthesia, and no patient died at surgery. Pericardial fluid cytology revealed malignant cells in 11 patients (44 percent), while tumor was seen in only five (45 percent) of these 11 patients on pathologic examination. The remaining 14 patients showed no evidence of pericardial invasion with tumor. Evidence of intrathoracic disease by CT or MRI scanning, tamponade, a sanguineous pericardial fluid character, and an elevated serum and pericardial fluid lactate dehydrogenase level all were suggestive of malignant invasion of the pericardium. All 25 patients were followed at least 12 months postoperatively. Effusions recurred in three patients (12 percent), and one patient required reoperation. Overall mortality was 72 percent with a 91 percent (10 of 11) mortality for those with malignant effusions and a 57 percent (8 of 14) mortality for those with nonmalignant effusions. Diagnostically, subxiphoid pericardiotomy has little advantage over examination of pericardial fluid alone in this group of patients. Therapeutically, however, it is a low morbidity procedure which is safe and effective in treating patients with malignancy and large pericardial effusions.
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PMID:Subxiphoid pericardiotomy in the diagnosis and management of large pericardial effusions associated with malignancy. 155 67

A 56-y-o female had recurrent bouts of unconsciousness and convulsions. Her blood glucose level was often below 40 mg.dl-1. Blood chemistry, echography and angiography revealed an insulinoma of 14 x 12 mm in size. Under sevoflurane anesthesia, excision of the tumor was scheduled. The preanesthetic glucose level was 38 mg.dl-1. Under fluid therapy, with 5% glucose in acetate Ringer solution, no hypoglycemic episode occurred during and after the operation. The arterial IRI level was elevated as the blood glucose level increased before the extirpation of the tumor, but it decreased to the normal level 30 minutes after the tumor removal. The IRI level of the portal vein also decreased from 81.7 microU.ml-1 to 19.0 microU.ml-1 after the removal. The perioperative course was uneventful under sevoflurane anesthesia and the result substantiates the report by Murakawa et al, who contend that sevoflurane suppresses the spontaneous release of insulin. We believe that sevoflurane is an appropriate anesthetic agent for a patient with an insulinoma.
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PMID:[Sevoflurane anesthesia for a patient with insulinoma]. 156 May 85

The anesthetic management of a 5-month-old male with norepinephrine-secreting neuroblastoma was described. Partial excision of the tumor was carried out under general anesthesia induced with enflurane, fentanyl and succinylcholine, and maintained with enflurane, nitrous oxide and oxygen. In this case, hypertension was observed intraoperatively and prostaglandin E1 was continuously infused at a rate of 0.1-0.5 micrograms.kg-1.min-1 to control blood pressure. Severe hypotension after removal of the tumor was not observed. Continuous administration of prostaglandin E1 was useful in this patient with norepinephrine-secreting neuroblastoma.
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PMID:[Anesthetic management of a patient with norepinephrine-secreting neuroblastoma by using prostaglandin E1]. 156 May 86

Early detection and treatment of preinvasive neoplasias decrease the incidence and mortality of the subsequent invasive cancers. This paper presents the results of a selective program to detect vulvar intraepithelial neoplasia (VIN). The program was selective because only "relative high risk" women were included, i.e. women with one or more of the following items: a) age more than 50 years; b) past history of epidermoid cervical or vaginal cancer (included intraepithelial stages); c) past history of genital radiation; d) past or actual history of genital condyloma; and e) past or actual history of hyperplasic or mixed vulvar dystrophy. Detection was made with the test described by Collins et al., staining the vulva with a toluidine blue aqueous solution and decoloring it with acetic acid. All positive sites (areas retaining the blue color) were biopsied under local anesthesia. Histopathology diagnosis served as gold standard for the program's evaluation. Patient with negative tests and those with NIV I were rescreened each 6 months. From March 1984 to September 1986, 212 patients were admitted in this program and 318 tests were performed. Individual tests varied from 1 (105 patients) to 5 (3 patients). The group was followed-up until March 1989, when the program was evaluated. There were 77 positive tests, among them 21 cases of NIV. Three women with NIV I progressed to NIV II during the observation period. NIV cases were classified as: NIV I, 7 cases (33.3%); NIV II, 10 cases (47.7%); and NIV III, 4 cases (19.0%).(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:[The results of a selective program to detect intraepithelial neoplasms of the vulva]. 156 42

Over the past decade, the principal advances in the imaging of genitourinary cancer have come in the fields of ultrasound, CT, and MR imaging. As applied to carcinomas of the urethra and penis, these techniques show promise. The local staging of the lesion may be done with either ultrasound or MR imaging. Ultrasound has correctly staged two penile cancers and predicted the presence or absence of lymph node metastasis. Sonourethrography has been successful in the evaluation of urethral stricture disease and should now be studied for imaging carcinomas of the urethra. Magnetic resonance imaging allows direct tumor visualization. This and its large field of view make it more accurate than clinical staging by palpation. In addition, MR imaging can identify destruction of both the tunica albuginea and the septum between the corpora by metastases to the penis or contiguous involvement by other neoplasms. It also offers the advantage of imaging in three orthogonal planes, giving more anatomic detail of the primary tumor. Tissue contrast is superb, and the study can simultaneously evaluate the pelvic nodes. After careful palpation of the primary tumor and examination of the regional and distant lymph nodes, we perform physical examination under anesthesia and obtain histologic confirmation of the cancer. We then base our decision to obtain further imaging studies on the grade and invasiveness of the tumor along with the findings on physical examination. In patients with tumors that appear to be superficial and are of low grade who have no evidence of regional or distant nodal disease on physical examination, further imaging is not carried out.(ABSTRACT TRUNCATED AT 250 WORDS)
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PMID:Recent advances in imaging studies for staging of penile and urethral carcinoma. 157 16

Early T1 and small T2 low rectal cancers may be controlled by endocavitary irradiation using the 50 kV Philips machine. The ambulatory treatment performed in the out-patient department consists of 4 applications within 6 weeks. Iridium-192 implant performed under local anesthesia is useful in many cases to give a booster dose to the tumor bed. In a series of 312 patients followed for greater than 5 years, the rates of local and nodal failure were 4.5% and 3.8%, respectively. The rate of death from cancer was 7.7%. After local excision endocavitary irradiation may be used as adjuvant therapy but it is safer to combine external beam and endocavitary irradiation. In the particular case of very poor risk patients with T2 or T3 tumors of the lower third of the rectum, a short course of external beam irradiation (30 Gy within 12 days) followed 2 months later by endocavitary irradiation may be a reliable procedure to prevent permanent colostomy in cases selected according to the patient's condition and the features of the residual disease. Of 67 patients followed for greater than 5 years, 3 patients died of distant metastasis and 5 patients died of local failures. These data, based on close collaboration with surgeons, suggest a reappraisal of the role of radiation therapy in the conservative management of rectal cancer.
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PMID:Endocavitary irradiation in the conservative treatment of adenocarcinoma of the low rectum. 158 79


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