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PubMedDate not supplied

Enhanced blood conservation and improved clinical outcome after valve surgery using heparin-bonded cardiopulmonary bypass circuits.

BACKGROUND: Recently, heparin-bonded (HBC) cardiopulmonary bypass circuits (CPB) were formed to be associated with improved outcome after coronary artery bypass grafting. There are very few reports on the efficacy and safety of these circuits in valve surgery. METHODS: A retrospective cohort study of all patient populations undergoing first time valve surgery from 1992 to 1995 in a tertiary teaching hospital. Outcomes of 120 patients undergoing valve surgery using HBC and lower anticoagulation HBC were compared to 232 patients treated with conventional circuits and full heparinization (nonheparin-bonded-circuit [NHBC]). RESULTS: Postoperative 24-hour chest tube drainage (558 +/- 466 mL vs 1054 +/- 911 mL, p < 0.00001), and reoperation for bleeding (2.5% vs 8.2%, p = 0.04) were lower in the HBC group. HBC patients required significantly less transfusions (total donor exposure of 6.9 +/- 13.0 units vs 18.6 +/- 26.2 units, p < 0.00001). Multiple linear regression analysis identified CPB time as a predictor of increased homologous blood transfusions, and the use of HBC, a large body surface area, and elective procedure as predictors of decreased transfusions. Perioperative mortality was similar (HBC 2.5%, NHBC 4.7%, p = 0.24). Overall complications were lower in the HBC group (42% vs 56.2%, p = 0.02). Perioperative myocardial infarction (0.8% vs 1.3%, p = 0.58) and cerebrovascular accident (3.3% vs 3.9%, p = 0.53) were similar. Two (1.7%) HBC patients had valve re-replacement compared to none in the NHBC (p = 0.22). Multiple logistic regression model revealed that age and CPB time were associated with increased complications, and the use of HBC with reduced complications. CONCLUSION: Use of HBCs with lower anticoagulation in valve surgery resulted in a significant reduction of transfusion requirements and improved clinical outcome. Because of a potential for early mechanical valve thrombosis, until further data is available, conventional levels of systemic anticoagulation should be achieved when using HBC in valve surgery.

Aged↗
PubMed1996

Aprotinin in primary valve replacement and reconstruction: a multicenter, double-blind, placebo-controlled trial.

BACKGROUND: Patients having cardiac operations often require blood transfusions. Aprotinin reduces the need for blood transfusions during coronary artery bypass graft operations. To determine the safety and effectiveness of aprotinin in reducing the use of allogeneic blood and postoperative mediastinal chest tube drainage, we studied 212 patients undergoing primary sternotomy for valve replacement or repair. METHODS: This study was multicenter, randomized, prospective, double-blind, and placebo-controlled. Patients received high-dose aprotinin (n = 71), low-dose aprotinin (n = 70), or placebo (n = 71). The study medication was given as a loading dose followed by a continuous infusion and pump prime dose. Heparin administration was standardized. Transfusions, postoperative mediastinal shed blood, and adverse events were tracked. RESULTS: Demographic profiles were similar among the treatment groups. Aprotinin did not decrease the percentage of patients receiving transfusions when compared with placebo (high-dose aprotinin, 63%, p = 0.092; low-dose aprotinin, 52%, p = 0.592; placebo, 48%). Aprotinin was associated with a reduction in the volume of mediastinal shed blood (high-dose aprotinin vs placebo, p = 0.002; low-dose aprotinin vs placebo, p = 0.017). Adverse events were equally distributed among the treatment groups except for postoperative renal dysfunction (high-dose aprotinin, 11%; low-dose aprotinin, 7%; placebo, 0%; p = 0.01). A disproportionate number of patients in the high-dose aprotinin group with postoperative renal dysfunction also had diabetes mellitus. CONCLUSIONS: Aprotinin treatment in this population did not reduce allogeneic blood use, although there were significant reductions in the volume of mediastinal shed blood.

Aprotinin↗
PubMed1998

Tranexamic acid and aprotinin reduce postoperative bleeding and transfusions during primary coronary revascularization.

UNLABELLED: We evaluated the blood conservation effects of tranexamic acid (TA) or aprotinin administered before and during cardiopulmonary bypass (CPB) in a prospective, randomized, double-blind study of 150 adult patients undergoing primary coronary artery bypass grafting surgery. Patients received either TA (2 g) or large-dose aprotinin (7 million KIU). Thirty additional untreated patients otherwise managed in a similar fashion were included from a recently completed study for comparison of outcomes. Demographic, medical, surgical, laboratory, mediastinal chest tube drainage (MCTD), transfusion, and outcome data were collected. Allogeneic blood product administration was tightly controlled. The demographic, medical, and surgical characteristics did not significantly differ between the two therapy groups. The median postoperative MCTD loss in the TA group did not significantly differ from that in the aprotinin-treated group (708 vs 600 mL). The percentage of patients that received no allogeneic blood products was 25% for the TA group and 27% for the aprotinin group (P = not significant). The median number of allogeneic blood products administered to the TA group (0 U) did not significantly differ from that administered to the aprotinin group (0 U). The percentage of patients with excessive MCTD (>1000 mL/24 h) did not significantly differ between groups (19% and 17%, respectively). In comparison, the control group had a significantly greater (P < 0.05) median MCTD (1020 mL), median allogeneic blood product exposure (4.5 U), and incidence of excessive MCTD (66%) and transfusion therapy (66%). These data help to support the use of pharmacologic methods to improve clinically relevant indicators of blood conservation for primary CPB procedures. Furthermore, the data show that TA is equivalent to aprotinin for blood conservation in patients at risk of excessive post-CPB bleeding and transfusion therapy. IMPLICATIONS: In a randomized, blind trial, we evaluated the effects of tranexamic acid or aprotinin on blood conservation after primary cardiopulmonary bypass surgery. Both drugs were equally effective in reducing blood loss, the incidence of transfusion, and the amount of blood products transfused compared with placebon.

Antifibrinolytic Agents↗
PubMed1986

Pneumothorax from nasoenteric feeding tube insertion. A report of five cases.

This report describes five patients who developed pneumothorax following misplacement of a nasoenteric feeding tube. Three of the patients required tube thoracostomy. Of these, one was subsequently discharged; one required two chest tubes, yet died 2 days later; the third patient developed a chronic empyema that ultimately required chest wall reconstruction for resolution. The development of pneumothorax from nasoenteric feeding tube misplacement was influenced by the type of tube and the general characteristics of the patients. The use of a cuffed endotracheal tube did not afford protection against misplacement. The significant morbidity and mortality associated with pneumothorax following nasoenteric feeding tube insertion argue for careful evaluation of the clinical setting when considering enteral nutritional support with a nasoenteric feeding tube.

Aged↗
PubMed2001

Early complications of thoracic endoscopic sympathectomy: a prospective study of 940 procedures.

BACKGROUND: Thoracic endoscopic sympathectomy (TES) has become the surgical technique of choice for treating intractable palmar hyperhidrosis and is usually considered as a simple and safe procedure. To evaluate the complication rate of TES, we conducted a prospective study of peri- and postoperative complications. METHODS: From 1995 to 1999, 467 consecutive patients were operated on for upper limb hyperhidrosis. There were 164 men and 303 women, ranging in age from 15 to 59 years (mean 31 years). In all but 5 cases, the procedure was bilateral. Eleven patients underwent a reoperation for failure; thus the total number of sympathectomies was 940. The procedure was performed in two stages in 182 patients and in one stage in 267 patients. All patients were seen 1 month after the operation. RESULTS: There was no mortality. The mean postoperative hospital stay was 2.3 days in the group of patients who were operated on in two stages and 1.1 day in patients who were operated on in one stage. There were three major complications: one tear of the right subclavian artery and two chylothoraces. There were 25 cases (5.3%) of bleeding (300 to 600 mL) during dissection of the sympathetic trunk due to injury to an intercostal vein; in all cases it was controlled thoracoscopically. There were 12 pneumothoraces (1.3%) after removal of chest tubes. All of these were unilateral. Four required chest drainage for a period of less than 24 hours. One patient had a mild pleural effusion. Four patients had a unilateral partial Horner Syndrome (0.4%) that disappeared within 3 months in 2 patients. The other 2 patients were lost to follow-up. One patient complained of rhinitis. CONCLUSIONS: Although morbidity was low, significant complications of TES occurred. Patients should be clearly warned that TES is not as minor a procedure as usually asserted. Complications as well as adverse effects should be considered when discussing this surgical indication.

Adolescent↗
PubMed2004

Recombinant factor VIIa for refractory bleeding following orthotopic heart transplantation.

OBJECTIVE: To report a case of successful use of recombinant factor VIIa (rFVIIa) for the treatment of refractory bleeding in a patient undergoing orthotopic heart transplantation. CASE SUMMARY: A 57-year-old white male with idiopathic cardiomyopathy was taken to the operating room for explantation of his left-ventricular assist device and orthotopic heart transplantation. He experienced excessive generalized oozing that required transfusions of multiple units of blood products and significant amounts of Cellsaver (washed red blood cells via autotransfusion) without achieving adequate hemostasis. After ruling out any obvious surgical sources of bleeding and attempting to correct all coagulation deficiencies, the clinicians administered rFVIIa 90 microg/kg. The oozing rapidly declined to a negligible level, chest tubes and sternal wires were placed, and the chest was closed. The patient was on minimal inotropic support and was transferred to the intensive care unit in stable condition. DISCUSSION: Cardiac surgery is often associated with significant disruption of the coagulation system, particularly in high-risk patients, such as those undergoing removal of a ventricular assist device and subsequent orthotopic heart transplantation. This can lead to life-threatening bleeding that can require multiple hemostatic agents and significant transfusions to restore hemostasis. Recently, rFVIIa has been utilized as an alternative to massive transfusion for treatment of refractory bleeding in several patient populations, including some cardiac surgery patients. CONCLUSIONS: rFVIIa appears to be a viable option as rescue therapy for treatment of refractory bleeding following orthotopic heart transplantation. Despite the anecdotal success of rFVIIa in this setting, further clinical research is needed.

Blood Coagulation Disorders↗
PubMed2003

Pleuropulmonary blastoma in a child presenting with spontaneous pneumothorax.

The authors described a 27-month-old boy with the diagnosis of pleuropulmonary blastoma who presented with spontaneous pneumothorax. The child was admitted to our hospital with the chief complaint of respiratory distress for 8 months. Initial chest X-ray revealed tension pneumothorax on the right side. After chest tube insertion to the right side, a repeated chest X-ray showed minimal pleural effusion and a mass-like lesion at the right lower lung field. Computed tomography (CT) of the chest showed a cavity with intramural mass confined in the right lower lung accompanied with hydropneumothorax. The surgery revealed a cystic and solid mass occupying the right pleural space medially displacing the right lower lung. Total removal of the mass was performed, the histopathologic findings revealed a mixed cystic and solid type of pleuropulmonary blastoma which was composed of primitive blastema with multidirectional differentiation. Combination chemotherapy consisting of vincristine, cyclophosphamide, doxorubicin and dactinomycin was administered two weeks after surgery. The child has been well for almost 6 months since the surgery, without any signs of metastasis or recurrence.

Child, Preschool↗
PubMed1980

Iatrogenic intubation injuries of the upper gastrointestinal tract in adults.

Perforation of the hypopharynx, esophagus, and stomach complicated the insertion of flexible tubes in 11 adults. Nasogastric suction tubes were responsible for 5 instances of gastric perforation. Palliative intubation of obstructive carcinomas of the distal esophagus resulted in delayed perforation of the esophagus and stomach in 2 cases. The use of a Linton tube for decompression of bleeding varices caused esophageal rupture in 1 patient whereas 2 others developed pharyngoesophageal perforation due to misplaced endotracheal tubes. The remaining 1 case demonstrated penetration of a chest tube into the esophageal lumen. The radiographic features and mechanisms of these iatrogenic injuries are described and the pertinent literature is reviewed.

Adult↗
PubMed1999

The use of pleuroperitoneal shunts in the management of persistent chylothorax in infants.

BACKGROUND/PURPOSE: The development of chylothorax is a serious and often life-threatening clinical entity that may cause profound respiratory, nutritional, and immunologic complications and has become increasingly common in recent years. Optimal management of this problem has not been well defined because medical therapy has a significant failure rate. Surgical treatment of complicated chylothorax has become a mainstay of care. METHODS: Over the last 36 months, seven infants had a pleuroperitoneal shunt placed for the management of refractory chylothorax. Ages ranged from 10 to 66 days with a weight between 1,000 to 4,850 g. Five of the seven infants were ventilator dependent. The etiologies were congenital in four and acquired in three with one related to a cardiothoracic procedure, one related to superior vena caval thrombosis, and one postoperative diaphragmatic hernia repair with superior vena caval thrombosis. Associated conditions included a left congenital diaphragmatic hernia, asplenia, isolated renal agenesis, bronchopulmonary dysplasia, and a patent ductus arteriosus. Each patient was unresponsive to thoracentesis, tube thoracostomy, and dietary manipulation with preoperative volume of chest tube output ranging from 50 to 162 cc/kg/d. The duration of preoperative therapy in congenital occurrences ranged from 10 to 46 days (average, 22 days). A Denver double-valved shunt system was used and catheters were implanted under general anesthesia. Manual pumping was required postoperatively on an hourly basis. RESULTS: All seven patients had excellent results with the elimination of the chylothorax and resolution of symptoms. There were two complications. Shunt survival rate was six of seven (86%). Shunt removal ranged from 24 to 79 days (average, 44 days). Patient survival rate was five of seven (71%) with one infant dying of progressive pulmonary disease and one infant dying from viral sepsis; both had functioning shunts. One patient remains ventilator dependent secondary to chronic lung disease from prematurity. CONCLUSIONS: Pleuroperitoneal shunting is safe, simple, and an effective treatment of chylothorax in infants despite their size, age, or degree of prematurity.

Catheters, Indwelling↗
PubMed1983

A simple technique for securing tubes.

The brief task of inserting a tube, such as a central venous catheter or a chest tube, is usually followed by the longer task of ensuring that the tube will not be inadvertently pulled out. Various methods for securing tubes have been described, and yet these tubes continue to be pulled out with frustrating predictability. The author describes a technique for securing tubes which is simple, effective, requires no special equipment or assistance, and which is applicable to any flexible tube or catheter inserted at a site suitable for placement of an anchoring suture. After the anchoring suture is secured to the skin, an easily mastered knot is performed which, because it will not slip when tightened, allows an indentation to be made in the tube. Once this indentation is further secured with a square knot, it will not allow the tube to slip through it.

Humans↗
PubMed1996

Laparoscopy for triage of penetrating trauma: the decision to explore.

The role of diagnostic laparoscopy in penetrating trauma continues to evolve. We reviewed our experience to determine the effect of laparoscopy on therapeutic laparotomy rates, length of hospital stay, and hospital charges. Laparoscopy was performed on 106 hemodynamically stable patients with penetrating abdominal injuries (66 had gunshot wounds, 40 had stab wounds). All patients with laparoscopically identified peritoneal penetration underwent open laparotomy. At laparoscopy, 41 (39%) had positive findings, whereas 65 (61%) had none. Two patients with retroperitoneal hematomas and one with ecchymosis of the peritoneum were not explored. Thus 68 (64%) did not require laparotomy. Among the 38 who underwent laparotomy, 29 (76%) had positive findings and 9 (24%) had a negative laparotomy. Nineteen patients (50%) had a therapeutic laparotomy. This compares with a therapeutic laparotomy rate of 18% had all 106 patients undergone mandatory laparotomy. Data for length of stay and hospital charges were analyzed. Due to the extended stay associated with tube thoracostomy (n = 21), a subgroup excluding patients with chest tubes was also analyzed. In this subgroup, there was a significant difference in hospital stay between those who had only a laparoscopy and those who underwent a negative laparotomy (2.6 +/- 1.7 vs. 4.7 +/- 1.6, p < 0.01). The average nonsurgical charge for patients who had a negative laparotomy was more than double that for those who had laparoscopy only ($8275 +/- 4692 vs. $3762 +/- 3786, p < 0.01). We conclude that the use of diagnostic laparoscopy to identify peritoneal penetration resulted in an improved therapeutic laparotomy rate as well as significant reduction in hospital stay and hospital charges.

Abdominal Injuries↗
PubMed2000

Video-assisted thoracoscopic surgery for children with stage II empyema.

Children with stage II empyema often fail traditional medical management, frequently succumbing to the effective albeit morbid clutches of thoracotomy. Video-assisted thoracoscopic surgery (VATS) has been recently introduced as a viable and potentially less morbid alternative to open thoracotomy. We review our VATS experience in children with empyema, assessing surgical outcome. Between August 1996 and March 1999, 13 patients at our institution with stage II empyema that did not respond to conventional medical management underwent a modified VATS with decortication. Data from retrospective chart review reflects intraoperative findings and postoperative course, including average time to defervescence, removal of thoracostomy tube, and hospital discharge. VATS was completed in all 13 patients. All intraoperative cultures of pleural fluid and fibrinopurulent debris obtained at VATS showed no growth. The average time to defervescence was 2.2 days (range, 0-4 days) and to removal of thoracostomy tube 3.6 days (range, 2-5 days). Average total chest tube days in patients with pre-VATS thoracostomy (n = 6) was 14.5 days (range, 8-37 days) versus 3.1 days (range, 2-5 days) in patients (n = 7) who underwent primary VATS (t test, p < 0.05). The average time to surgical discharge after VATS was 5.8 days (range, 3 to 19 days). All patients were well on follow-up clinic visits without delayed complications. VATS can be performed safely and effectively in children with stage II empyema, thus avoiding the morbidity of open thoracotomy and decortication. Importantly, early application of VATS significantly relieves patients of unnecessary days of thoracostomy drainage.

Adolescent↗
PubMed2001

Empyema thoracis: lack of awareness results in a prolonged clinical course.

OBJECTIVE: To assess the hypothesis that empyema thoracis (ET) is a problem often not optimally treated. Long delays in diagnosis are common, long hospital stays are typical and recovery with surgery is relatively rapid. DESIGN: A chart review. SETTING: The Regina Health District associated hospitals, a tertiary referral centre. PATIENTS: The charts of 34 consecutive patients having primary respiratory tract disease and seen during the 6-year period Apr. 1, 1991, to Mar. 31, 1997, were identified. OUTCOME MEASURES: Patient presentation, time until diagnosis of ET, number of radiologic investigations, microbiologic features, treatment methods, postoperative course and mortality. RESULTS: The mean delay in diagnosis, defined as the time of admission to the time of correct diagnosis, was 44.2 days (range from 0 to 573 days) and the mean delay until thoracic surgery referral was 47.4 days (range from 0 to 578 days). On average each patient underwent CT 10.1 times, had 2.6 percutaneous drainage procedures and 2.0 chest tube insertions. The mean time from the first percutaneous chest drainage to the date of diagnosis was 29.8 days (range from 0 to 564 days). Of the 26 patients who underwent CT, the mean time from the first CT of the chest to the date of diagnosis was 9.5 days (range from 0 to 75 days). Cultures of pleural fluid grew no organisms in 17 patients; in the remaining 17 patients cultures grew 23 different microorganisms. Of 26 patients who were referred for surgical opinion, 18 underwent decortication; 8 were not considered to be surgical candidates. Pathological examination showed 17 cases of inflammatory empyema and 1 case of mesothelioma (unrecognized clinically). The mean length of hospital stay postoperatively was 15.2 days. CONCLUSIONS: Early suspicion of ET facilitates its treatment, resulting in fewer investigations and shorter hospital stays. When percutaneous drainage does not eliminate pleural effusions, empyema must be considered. Recovery from surgical decortication is rapid in comparison with the typical protracted preoperative hospital course.

Adult↗
PubMed1991

[Early management of the intrathoracic area].

The procedures of preclinical management of chest injuries are presented. Emphasis is put on the different aspects of "acute thorax": sucking chest wound, pericardial tamponade, oligemic shock and open thorax. The primary acute management includes the chest tube, intubation, ventilation, pericardiocentesis and surgical management of penetrating chest trauma. The different in the literature are discussed.

Drainage↗
PubMed1993

[Video-thoracoscopy diagnosis and treatment of persistent post-traumatic pneumothorax].

Despite correct chest tube drainage, 2 patients had persistent pneumothorax after blunt chest trauma and were referred for further treatment. Videothoracoscopy revealed small lung lacerations caused by rib fragments. A small wedge resection performed via thoracoscopy by the use of an endostapler resulted in immediate and permanent relief of air leakage.

Aged↗
PubMed1995

Respiratory mechanics after tube thoracostomy in rats.

The purpose of the present study was to determine the mechanical respiratory profile after the insertion of a catheter into the pleural cavity of anesthetized, paralyzed, mechanically ventilated rats, thus stimulating the common use of chest tubes in clinical situations. Using the method of end-inflation occlusion during constant inspiratory flow in 7 adult Wistar rats, respiratory system, lung, and chest wall total resistance (0.353 +/- 0.058, 0.260 +/- 0.651, 0.091 +/- 0.012 (mean +/- SD) cmH2O.ml-1.s, respectively), viscous resistance (0.140 +/- 0.007, 0.100 +/- 0.007, 0.040 +/- 0.003 cmH2O.ml-1.s< respectively), and viscoelastic resistance (0.213 +/- 0.017, 0.160 +/- 0.022, 0.053 +/- 0.011 cmH2O.ml-1.s, respectively) as well as respiratory system, lung, and chest wall static elastance (4.51 +/- 0.27, 3.85 +/- 0.28, 0.66 +/- 0.12 cmH2O.ml-1, respectively), and dynamic elastance (5.72 +/- 0.24, 4.76 +/- 0.32, 0.96 +/- 0.17 cmH2O.ml-1, respectively) were not significantly modified after the insertion of a tube into the second right intercostal stage. We conclude that, under the present experimental conditions, a catheter inserted into the pleural space per se is not responsible for any alterations in respiratory mechanics.

Airway Resistance↗
PubMed1992

Simultaneous bilateral spontaneous pneumothorax: case report.

A 22-year-old previously healthy male was admitted to the emergency department for chest pain and dyspnea of 1-day's duration. He had a history of heavy smoking. The patient was cyanotic, agitated, and severely dyspneic. Lung auscultation revealed severe diffuse bronchospasm and equally diminished breath sounds on both sides. Nasotracheal intubation and mechanical ventilation were performed shortly after admission due to acute respiratory failure. Simultaneous bilateral spontaneous pneumothorax was diagnosed from the chest x-ray, and chest tube drainage was immediately performed bilaterally. Computerized tomography of the chest 1 month later showed diffuse emphysematous bullae of the lungs. The case presented here should increase physicians' awareness of this rare form of spontaneous pneumothorax and its diverse manifestations.

Adult↗
PubMed1995

Effects of erythromycin on the rabbit pleura: its potential role as a pleural sclerosant.

Tetracycline (TCN) has been considered the agent of choice for pleurodesis in patients with symptomatic malignant pleural effusions and recurrent pneumothoraces. However, the intravenous form of TCN used for pleurodesis is no longer available. Erythromycin, like TCN, often produces irritation when administered intravenously. In view of these irritant properties, we tested the effect of erythromycin as a pleural sclerosant in rabbits as compared with TCN. Normal saline was used as a control. Adult rabbits weighing 2.5 to 3.0 kg underwent sterile placement of a silastic pleural tube in the right pleural space. Erythromycin (n = 17) or TCN (n = 6), each in doses of 35 mg/kg in 2 ml saline, was administered via the tube. Control animals (n = 6) received 2 ml saline. The chest tubes were left in place for removal of pleural fluid and to maintain lung expansion. Animals were killed 8 d after receiving the various treatments, and their pleural surfaces were examined grossly and histologically. Numerous adhesions were present between the visceral and parietal pleurae in all animals receiving erythromycin and TCN, but not in those receiving saline. On light microscopy, pleurae treated with erythromycin or TCN were histologically identical, showing inflammation, edema, and fibroblast proliferation in the submesothelial tissues. The saline-treated animals had a normal pleura. Because erythromycin produced pleural inflammation and adhesions within 8 d of treatment, we propose that it may have a potential role as a pleural sclerosant.

Animals↗