Seminars in thoracic and cardiovascular surgery
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Semin. Thorac. Cardiovasc. Surg. · Oct 2000
Cardiothoracic intensive care: operation and administration.
The cardiothoracic surgery intensive care unit (CTICU) has evolved as a separate entity from the general surgical intensive care unit as management for cardiac surgery patients has become streamlined and algorithm driven. Critical care is best managed when the service is designed for a homogeneous population with a circumscribed set of medical and surgical issues. The repetition involved with the subspecialty care allows health care providers such as primary care nurses, nurse practitioners, physician assistants, and other ancillary services to become appropriately focused on issues pertinent to this population. ⋯ A responsible physician should be available in the CTICU, especially during the immediate postoperative period when physical assessment and direct hands-on involvement are essential. In an era when the operative team (ie, cardiac surgeon and cardiac anesthesiologist) must return to the surgical suite soon after the patient arrives in the intensive care unit, the presence of a physician dedicated to postoperative medical and surgical management becomes mandatory. According to the Joint Commission on Accreditation of Healthcare Organizations, "Each special care unit is properly directed and staffed according to the nature of the special patient care needs anticipated and scope of services provided." The assignment of staff is designed to match experience with patient acuity.
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Semin. Thorac. Cardiovasc. Surg. · Oct 2000
ReviewManagement of bleeding and coagulopathy after heart surgery.
Mechanisms of bleeding common to virtually all patients after heart surgery are platelet dysfunction, enhanced fibrinolysis, dilution of all components of the coagulation system, and the presence of heparin and protamine. The use of warfarin is increasing in patients with heart disease requiring surgery. The replenishment of vitamin K-dependent factors beyond a normal prothrombin time is not assessable, and the dilution associated with cardiopulmonary bypass can reach coagulopathic levels. ⋯ When bleeding is observed in the postoperative period, a sequential assessment of the probable cause leads to initial therapy while laboratory test results are obtained. Ongoing assessment for hemodynamic instability caused by accumulated mediastinal blood is needed while managing the bleeding patient. A chest radiograph and transesophageal echocardiogram can be useful in diagnosing cardiac tamponade.
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Semin. Thorac. Cardiovasc. Surg. · Jul 2000
The thoratec ventricular assist device: a paracorporeal pump for treating acute and chronic heart failure.
The Thoratec Ventricular Assist Device (VAD) System (Thoratec Laboratories, Pleasanton, CA) is a paracorporeal pump that can provide univentricular or biventricular assistance for patients with heart failure. The system consists of a prosthetic ventricle that has a blood-pumping chamber of Thoralon (Thoratec Laboratories) polyurethane, cannulas for univentricular or biventricular support, and either a hospital-based pneumatic drive console or a portable battery-powered drive unit. For biventricular assistance, 2 pumps are used. ⋯ Patient mobility is being improved by the use of a portable driver. The Thoratec VAD is suitable for a wide range of applications, and efforts are underway to facilitate patient mobility and allow hospital discharge. An intracorporeal version of the VAD, which is currently under development, will help achieve these goals.
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Semin. Thorac. Cardiovasc. Surg. · Jul 2000
ReviewMinimally invasive approaches to antireflux surgery.
Gastroesophageal reflux disease is one of the most common disorders affecting western civilization. Historically, surgical antireflux therapy was reserved for patients who had failed medical therapy, typically in the presence of refractory ulcers or difficult-to-manage strictures. More recently, with improvements in acid control, these acid-pepsin-related complications of reflux have been replaced by the malignant complications of reflux disease, with emphasis now on total control of reflux. ⋯ This article summarizes the recommended diagnostic evaluation of patients with reflux symptoms and the current indications for antireflux surgery. The techniques of commonly performed minimally invasive antireflux procedures are described along with a review of the results to be expected. Future prospects for improving the management of reflux are discussed; these include recently described nonsurgical methods for restoring competency to the lower esophageal sphincter.
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Semin. Thorac. Cardiovasc. Surg. · Jul 2000
ReviewMinimally invasive approaches to acquired shortening of the esophagus: laparoscopic Collis-Nissen gastroplasty.
Acquired shortening of the esophagus remains a controversial finding. In some surgical series of patients with gastroesophageal reflux disease, the incidence of clinically significant shortening is low enough that some surgeons have questioned its existence. In the setting of massive hiatial hernia, esophageal shortening has been reported to occur in up to 100% of patients. ⋯ Failure to recognize this shortening may be responsible for a high failure rate after antireflux surgery. Open Collis gastroplasty is an effective way to manage acquired shortening of the esophagus, and it creates a tension-free intra-abdominal segment of neoesophagus for fundoplication. Minimally invasive approaches to Collis-Nissen procedures have been reported by our group and several others with good short-term results.