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Biomedical subjects

Evan G Pivalizza

Publications and source records attributed to Evan G Pivalizza.

16 recordsLinked to original sources
PubMed2007

The accuracy of electrocardiogram-controlled central line placement.

BACKGROUND: Electrocardiogram (ECG) guidance to confirm accurate positioning of central venous catheters (CVC), placed before surgery in the operating room, is rarely used in the United States. We designed this randomized, controlled trial to investigate whether the use of this technique impacts the accuracy of CVC placement. METHODS: Patients in group ECG (n = 147) had a CVC placed using right-atrial ECG to guide catheter tip positioning. CVCs in group NO-ECG (n = 143) were positioned without this technique. RESULTS: Overall, guidewire-ECG control resulted in more correctly positioned CVCs (96% vs 76%, P < or = 0.001) without increasing placement time. Significantly more CVCs were placed in the middle of the superior vena cava in group ECG (P < or = 0.001), although placement into the right atrium or right ventricle and into other vessels occurred significantly more often in group NO-ECG (P < or = 0.001). Twenty patients in group NO-ECG required repositioning of their CVC after surgery, whereas this maneuver was necessary only in three patients in group ECG (P < or = 0.001). CONCLUSIONS: ECG guidance allows for more accurate CVC placement, and should be considered to increase patient safety and reduce costs associated with repositioning procedures.

Adult↗
PubMed2006

The role of anesthesiologists in the selection and administration of perioperative antibiotics: a survey of the American Association of Clinical Directors.

The importance of timely administration of antibiotics for prophylaxis of surgical site infections has led to pressure on anesthesiologists to administer antibiotics. We present a survey of members of the American Association of Clinical Directors designed to evaluate the role of the anesthesiologist in the selection and administration of perioperative antibiotics. A 13-question survey was sent via e-mail to all 233 members of the American Association of Clinical Directors. Two requests for survey responses resulted in a response rate of 43%. Based on the responses received, anesthesiologists appear to be integrally involved with the administration, but not selection, of perioperative antibiotics, despite what respondents perceive as inadequate training in antibiotic therapy. Furthermore, perioperative antibiotic therapy in general appears to be poorly monitored, and responsibility for selection and administration of perioperative antibiotics appears to be poorly defined.

Anesthesiology↗
PubMed2003

Perioperative use of the Thrombelastograph in patients with inherited bleeding disorders.

There are few reports of the use of Thrombelastgraph (TEG) in patients with isolated or inherited bleeding disorders. Three surgical patients are presented with von Willebrand's disease, factor XII deficiency, and hemophilia A with dysfibrinogenemia in which the abnormalities detected by the TEG were similar to the expected coagulation abnormalities based on preoperative laboratory studies. This initial report suggests that this potential application of the TEG be further investigated.

Adenoidectomy↗
PubMed2003

Anaesthesia for magnetoencephalography in children with intractable seizures.

BACKGROUND: Magnetoencephalography (MEG), a noninvasive technique for evaluation of epileptic patients, records magnetic fields during neuronal electrical activity within the brain. Anaesthesia experience for MEG has not yet been reported. METHODS: We retrospectively reviewed records of 48 paediatric patients undergoing MEG under anaesthesia. Thirty-one patients (nonprotocol group) were managed according to the anaesthesiologist's discretion. Premedication included oral midazolam, chloral hydrate or fentanyl oralet, intravenous midazolam or inhalational anaesthesia with sevoflurane. Anaesthesia was maintained with propofol, midazolam, fentanyl, alone or in combination. A subsequent protocol group (17 patients) received chloral hydrate as premedication and propofol for maintenance of anaesthesia. RESULTS: There was an overall 25% failure of interictal activity and localization on the MEG scan. In the nonprotocol group, 11 scans failed (35.5%). Of these, eight (72.7%) received midazolam orally. Only one failure (5.8%) was recorded in the protocol group in a patient who received chloral hydrate as sedation supplemented by sevoflurane. CONCLUSIONS: In our experience, midazolam premedication resulted in a high MEG failure rate (73%). Chloral hydrate premedication and propofol maintenance resulted in a lower incidence of MEG failure (5.8%). General anaesthesia with a continuous infusion of propofol or sevoflurane appears acceptable, although, lighter levels of anaesthesia might be required to avoid interference with interictal activity of the brain.

Anesthesia, General↗
PubMed2002

Monitoring of hirudin therapy with the Thrombelastograph.

Lepirudin is a specific thrombin inhibitor that is used for anticoagulation in patients with heparin-induced thrombocytopenia who are also undergoing cardiopulmonary bypass (CPB). Monitoring of lepirudin during CPB has been carried out with activated clotting time and ecarin clotting time. Correlation is poor with the former method, whereas ecarin clotting time is not widely available. A patient is described with heparin-induced thrombocytopenia who underwent CPB, where coagulation monitoring was accomplished with the Thrombelastograph. This more widely available method may be useful in such patients.

Anticoagulants↗