Abstract:
BACKGROUND:Currently, the monitoring of cardiac output (CO) and stroke volume (SV) is mainly performed using invasive techniques. Therefore, performing CO monitoring noninvasively by means of electrical impedance tomography (EIT) would be advantageous for intensive care. Our hypothesis was that, by means of EIT, it is possible to assess heart rate (HR) and to quantify changes in SV due to changes in ventilator settings. METHODS:CO (HR and SV) of 14 pigs (32-40 kg body weight) was changed by incremental increases in positive end-expiratory pressure levels (0, 5, 10, 15, and 20 cm·H2O; ramp maneuver). This ramp maneuver was applied 4 times in each animal, yielding 43 evaluable single experiments. At each positive end-expiratory pressure level, SV was assessed by transpulmonary thermodilution using a PiCCO device. EIT data were acquired using a Dräger EIT Evaluation Kit 2. RESULTS:The EIT-based SV-related signal, Z(SV) (in [AU]), showed only a weak correlation (after excluding 2 measurements) with SV(TTD) of r = 0.58 (95% confidence interval, 0.43-0.71). If Z(SV) is calibrated by the reference 1 time for each experiment (defined as SVEIT), the correlation is approximately 0.85 (95% confidence interval, 0.78-0.90). A possible reason for the moderate correlation is the unexpected scaling pattern, leading to amplification of the cardiac impedance signal, found in some animals. The scaling is probably due to the imperfect reconstruction (i.e., a change of sensitivity) of the EIT images or to a change in the position of the heart. CONCLUSIONS:The hypothesis that EIT can be used to monitor CO and SV was confirmed, but further studies are required before this technique can be applied in clinical practice. HR was determined robustly and accurately. For SV monitoring, promising results were obtained in 80% of the experiments. However, unexpected scaling of the cardiac EIT signal causing inaccurate estimation of SV remains an issue. Before robust assessment of SV by EIT is suitable for clinical practice, the cause of and compensation for undesired scaling effects need to be investigated.
journal_name
Anesth Analgjournal_title
Anesthesia and analgesiaauthors
Pikkemaat R,Lundin S,Stenqvist O,Hilgers RD,Leonhardt Sdoi
10.1213/ANE.0000000000000241subject
Has Abstractpub_date
2014-07-01 00:00:00pages
76-83issue
1eissn
0003-2999issn
1526-7598journal_volume
119pub_type
杂志文章abstract:UNLABELLED:Isoflurane reduces myocardial infarct size during early reperfusion by activating phosphatidylinositol-3-kinase (PI3K) signaling. We tested the hypothesis that this cardioprotection against reperfusion injury is enhanced by morphine and that a decrease in apoptosis plays a role in preservation of myocardial ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ane.0000171931.08371.a2
更新日期:2005-10-01 00:00:00
abstract::The electroencephalograms of seven elderly (70-85 years) and seven younger patients (23-31 years) anesthetized with a concentration of isoflurane sufficient to produce burst suppression were studied. Anesthesia in these unpremedicated subjects was induced by inhalation of nitrous oxide, isoflurane, and oxygen. Trachea...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:
更新日期:1989-01-01 00:00:00
abstract:BACKGROUND:Botulinum neurotoxin type A (BoNT/A) has been used as an analgesic for myofascial pain syndromes, migraine, and other types of headaches. Although an antinociceptive effect of central or peripheral administration of BoNT/A is suggested, the effect at the spinal level is still unclear. In this study, we evalu...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0b013e3181ffa1d7
更新日期:2011-01-01 00:00:00
abstract::Perioperative interventions aimed at decreasing costs and improving outcomes have become increasingly popular in recent years. Anesthesiologists are often faced with a choice among different treatment strategies with little data available on the comparative cost-effectiveness. We performed a systematic review of the E...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0000000000003334
更新日期:2018-11-01 00:00:00
abstract::There are quantitative deficiencies in the coagulation system for at least the first 6 mo of life. Clinical experience, however, does not indicate an increased risk of excessive bleeding during surgical procedures. Thrombelastography, a test providing a functional evaluation of coagulation, was used to assess the hemo...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1097/00000539-199704000-00008
更新日期:1997-04-01 00:00:00
abstract::This retrospective case series of patients with refractory sacroiliac joint (SIJ) pain presents our first 77 SIJ radiofrequency ablation (RFA) procedures performed with a multilesion probe. Of these, 16 (20.8%) provided no relief; 55 (71.4%) provided >50% pain relief at 6 weeks; 42 (54.5%, 95% confidence interval, 42....
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,多中心研究
doi:10.1213/ANE.0000000000000282
更新日期:2014-08-01 00:00:00
abstract:BACKGROUND:Unanticipated hospital admission is regarded as a measure of adverse perioperative patient care. However, previously published studies for risk prediction after ambulatory procedures are sparse compared to those examining readmission after inpatient surgery. We aimed to evaluate the incidence and reasons for...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,多中心研究
doi:10.1213/ANE.0000000000004852
更新日期:2020-08-01 00:00:00
abstract:BACKGROUND:Perioperative respiratory adverse events (PRAEs) account for the major cause of morbidity and mortality in children undergoing general anesthesia. In our institutional clinical practice, we suspected that African American children experienced untoward respiratory events more frequently than other racial grou...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0000000000003430
更新日期:2018-07-01 00:00:00
abstract::Patients with frailty experience substantial physical and emotional distress related to their condition and face increased morbidity and mortality compared with their nonfrail peers. Palliative care is an interdisciplinary medical specialty focused on improving quality of life for patients with serious illness, includ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,评审
doi:10.1213/ANE.0000000000004763
更新日期:2020-06-01 00:00:00
abstract:UNLABELLED:IV volume is often administered to patients in an intensive care unit (ICU) to improve cardiovascular function. We investigated the relationship between stroke volume (SV) and left ventricular (LV) size by using transesophageal echocardiography (TEE) in a population of 20 ICU patients and 21 postoperative ca...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章
doi:10.1097/00000539-200002000-00021
更新日期:2000-02-01 00:00:00
abstract::Repeated conventional tracheal intubation attempts may contribute to patient morbidity. Critically-ill patients (n = 2833) suffering from cardiovascular, pulmonary, metabolic, neurologic, or trauma-related deterioration were entered into an emergency intubation quality improvement database. This practice analysis was ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ANE.0000122825.04923.15
更新日期:2004-08-01 00:00:00
abstract::Availability of physiologic monitoring equipment to ensure the safe administration of anesthesia is an expected standard in many parts of the world. Many hospitals in China may not have an adequate quantity and variety of anesthesia delivery and patient monitoring equipment to assure safe administration of anesthesia ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0b013e31825018cf
更新日期:2012-06-01 00:00:00
abstract:BACKGROUND:Many new mechanical ventilation modes are proposed without any clinical evaluation. "Dual-controlled" modes, such as AutoFlow™, are supposed to improve patient- ventilator interfacing and could lead to fewer alarms. We performed a long-term clinical evaluation of the efficacy and safety of AutoFlow during as...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,随机对照试验
doi:10.1213/ANE.0b013e3181f00015
更新日期:2010-10-01 00:00:00
abstract::To compare unilateral spinal block produced with small doses of hyperbaric ropivacaine with that produced by 2 doses of hyperbaric levobupivacaine, we randomly allocated 91 ASA physical status I-II outpatients undergoing knee arthroscopy to receive unilateral spinal anesthesia with 7.5 mg of hyperbaric ropivacaine 0.5...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1213/01.ANE.0000155265.79673.56
更新日期:2005-07-01 00:00:00
abstract:BACKGROUND:In this study, we evaluated the efficacy of celiac plexus block for the treatment of feeding intolerance in critically ill patients. METHODS:Nineteen mechanically ventilated medical patients intolerant of enteral nutrition and receiving metoclopramide underwent bilateral celiac plexus block. The anterior pr...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,随机对照试验,收录出版
doi:10.1213/ANE.0b013e3181cde870
更新日期:2010-04-01 00:00:00
abstract::We describe the unique process whereby simulation-based, objective structured clinical evaluation (OSCE) has been incorporated into the Israeli board examination in anesthesiology. Development of the examination included three steps: a) definition of clinical conditions that residents are required to handle competentl...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/01.ane.0000194934.34552.ab
更新日期:2006-03-01 00:00:00
abstract:BACKGROUND:Animal models show us that specific activation of the p38 mitogen-activated protein kinase (MAPK) may be a pivotal step in lidocaine neurotoxicity, but this has not been investigated in the case of two very widely used local anesthetics, bupivacaine and ropivacaine. We investigated the hypotheses that these ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ane.0b013e318168514b
更新日期:2008-05-01 00:00:00
abstract:BACKGROUND:When temporary arterial occlusion of the parent artery is difficult for anatomical reasons, or when inadvertent aneurysmal rupture occurs during surgical dissection, adenosine administration can be used to produce flow arrest and brief, profound systemic hypotension that can facilitate intracranial aneurysm ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0b013e3182a6d31b
更新日期:2013-11-01 00:00:00
abstract:UNLABELLED:We compared cerebral blood flow velocity during anesthesia with sevoflurane and halothane in 23 children admitted for elective surgery (age, 0.4-9.7 yr; median age, 1.9 yr; ASA physical status I-II). Inhaled induction was performed in a randomized sequence with sevoflurane or halothane. Under steady-state co...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章
doi:10.1097/00000539-200104000-00017
更新日期:2001-04-01 00:00:00
abstract::Dexmedetomidine has become a popular sedative in the intensive care unit for patients undergoing mechanical ventilation because of its highly selective α-2 agonism, which exerts a combination of anesthetic, analgesic, and anxiolytic effects. Bradycardia and hypotension have been reported as the most common side effect...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0b013e3182917c86
更新日期:2013-07-01 00:00:00
abstract:BACKGROUND:Capsaicin, the active component of chili peppers, can produce sensory-selective peripheral nerve blockade. Coadministration of capsaicin and tetrodotoxin, a site-1 sodium channel blocker, can achieve a synergistic effect on duration of nerve blocks. However, capsaicin can be neurotoxic, and tetrodotoxin can ...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0000000000004108
更新日期:2019-09-01 00:00:00
abstract:BACKGROUND:As the use of pulse oximeters increases, the needs for higher performance and wider applicability of pulse oximetry have increased. To realize the full potential of pulse oximetry, it is indispensable to increase the number of optical wavelengths. To develop a multiwavelength oximetry system, a physical theo...
journal_title:Anesthesia and analgesia
pub_type: 历史文章,杂志文章
doi:10.1213/01.ane.0000268716.07255.2b
更新日期:2007-12-01 00:00:00
abstract::Ten volunteers were studied during six stages of propofol sedation, namely awake (no propofol), light sedation (small dose of propofol), deep sedation (large dose), deep sedation with stimulation of the ulnar nerve, then light sedation again (small dose), and awake (recovery). Light and deep sedation were defined in t...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1097/00000539-199612000-00026
更新日期:1996-12-01 00:00:00
abstract:BACKGROUND:Intraoperative hypoglycemia can result in devastating neurologic injury if not promptly diagnosed and treated. Few studies have defined risk factors for intraoperative hypoglycemia. The authors sought to characterize children with intraoperative hypoglycemia and determine independent risk factors in a multic...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0000000000004979
更新日期:2020-06-25 00:00:00
abstract:UNLABELLED:Inhaled nitric oxide (iNO) is superior to i.v. vasodilators for treatment of pulmonary hypertension (PH) after cardiac surgery, but iNO is a potentially toxic gas, and patient subsets who benefit from iNO are not yet clearly defined. We administered iNO 40 ppm, prostaglandin E1 (PGE1) 0.1 microg x kg(-1) min...
journal_title:Anesthesia and analgesia
pub_type: 临床试验,杂志文章,随机对照试验
doi:
更新日期:1999-11-01 00:00:00
abstract::Clinical practice parameters have been published with greater frequency by professional societies and groups of experts. These publications run the gamut of practice standards, practice guidelines, consensus statements or practice advisories, position statements, and practice alerts. The definitions of these terms hav...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,评审
doi:10.1213/ANE.0000000000004441
更新日期:2019-12-01 00:00:00
abstract::Newer generation anesthesia machines are equipped with a pressure support mode of ventilation, which can be used to support spontaneous ventilation in anesthetized patients. The Drager Apollo anesthesia machine uses an inspiratory limb hot-wire flow sensor to measure inspiratory flow rates. Detected flow rates that ex...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ane.0b013e3181a9d75a
更新日期:2009-08-01 00:00:00
abstract:BACKGROUND:A potential physicochemical interaction between epidural local anesthetics and extended-release epidural morphine (EREM) could negate the sustained release. In this study, we sought to determine the pharmacokinetic and drug effects of prior epidural lidocaine administration on EREM. METHODS:Thirty healthy w...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章,随机对照试验
doi:10.1213/ANE.0b013e318222f59c
更新日期:2011-08-01 00:00:00
abstract:BACKGROUND:Adequate anticoagulation is essential to achieve efficient and cost-effective continuous renal replacement therapy (CRRT). However, in critically ill patients with advanced liver cirrhosis, this goal is challenging because of the concomitant bleeding disorder. Therefore, the evaluation of alternative anticoa...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:10.1213/ANE.0b013e31827ced39
更新日期:2013-03-01 00:00:00
abstract::A pharmacokinetic evaluation of bupivacaine was carried out after intercostal nerve blocks performed on 28 occasions in 27 children varying in age from 3 months to 16 yr. Bupivacaine HCl, 0.5%, with epinephrine 1:200,000 was employed. Doses of 2 mg/kg, 3 mg/kg, and 4 mg/kg resulted in peak whole blood arterial bupivac...
journal_title:Anesthesia and analgesia
pub_type: 杂志文章
doi:
更新日期:1986-06-01 00:00:00