Effect of Vacuum on Venous Drainage: an Experimental Evaluation on Pediatric Venous Cannulas and Tubing Systems.

Introduction: To observe how vacuum assisted venous drainage (VAVD) may influence the flow in a cardiopulmonary bypass circuit with different size of venous lines and cannulas. Methods: The experimental circuit was assembled to represent the cardiopulmonary bypass circuit routinely used during cardiac surgery. Wall suction was applied directly, modulated and measured into the venous reservoir. The blood flow was measured with a flow-meter positioned on the venous line. The circuit prime volume was replaced with group O date expired re-suspended red cells and Plasmalyte 148 to a hematocrit of 28% to 30%. Results: In an open circuit with gravity siphon venous drain, angled cannulae drain more than straight ones regardless the amount of suction applied to the venous line (16 Fr straight cannula (S) drains 90 ml/min less than a 16 Fr angled (A) with a siphon gravity). The same flow can be obtained with lower cannula size and higher suction (i.e. 12 A with and -30 mmHg). Tables have been created to list how the flow varies according to the size of the cannulas, the size of the venous tubes, and the amount of suction applied to the system. Conclusions: Vacuum assisted venous drainage allows the use of smaller cannulae and venous lines to maintain a good venous return, which is very useful during minimally invasive approaches. The present study should be considered as a preliminary attempt to create a scientific-based starting point for a uniform the use of VAVD. Keywords: cardio-pulmonary bypass; experimental study; vacuum assisted drainage

Partial lung resection of supernumerary tracheal bronchus combined with pulmonary artery sling in an adult: report of a case

An adult case of pulmonary resection for repeated infections in a supernumerary tracheal bronchus combined with a pulmonary artery sling is reported. A 33-year-old woman with a pulmonary artery sling was referred for recurrent lung infections. Chest computed tomography showed the left pulmonary artery arising from the right pulmonary artery and coursing posterior to the trachea. The lung parenchyma connected to the tracheal bronchus showed dense opacity and traction bronchiectasis. Partial pulmonary resection was performed with an ultrasonically activated scalpel after the tracheal bronchus was auto-sutured. The patient\u27s postoperative course was uneventful, and she is now in good condition

Unexpected interventricular septal hematoma after ventricular septal defect closure: Intraoperative echocardiographic early detection

Eur J Echocardiogr. 2007 Oct;8(5):395-7. Epub 2006 Jul 11. Unexpected interventricular septal hematoma after ventricular septal defect closure: intraoperative echocardiographic early detection. Padalino MA, Speggiorin S, Pittarello D, Milanesi O, Stellin G. Source Pediatric and Congenital Cardiac Surgery Unit, University of Padova, Medical School, Padova, Italy. [email protected] Abstract We report a rare case of an interventricular septal hematoma in a 4-month-old infant after patch closure of a membranous ventricular septal defect. Routine intraoperative transesophageal echocardiographic monitoring allowed immediate detection of intraventricular hematoma that was promptly treated by simple needle drainage after weaning off cardiopulmonary bypass. Patient's postoperative clinical course was uneventful. PMID: 16839820 [PubMed - indexed for MEDLINE

A new morphologic classification of congenital tracheobronchial stenosis

Background: Congenital tracheal stenoses are rare and life-threatening anomalies, associated with considerable variation in both morphology and prognosis. They have been classified previously according to the length of the stenosis or the severity of the symptoms, but not according to bronchial involvement. Methods: Data from patients who underwent slide tracheoplasty for long-segment (>50%) congenital tracheal stenosis were collected. We identified four different types of bronchial arborization (normal, n = 52; tracheal right upper lobe bronchus, n = 10; carina with "trifurcation, " n = 14; and unilateral bronchial and lung agenesis, n = 8). Each type included congenital tracheal (above the carina) or tracheobronchial (extending below the carina) stenosis. Results: Eighty-four children were enrolled in the study. Preoperative ventilation was necessary in 44 patients (52.4%; 75% in patients with a single lung), and preoperative extracorporeal membrane oxygenation was needed in 10 patients (11.9%). Preoperative tracheostomy was present in 3 patients initially treated elsewhere (3.5%), and a left pulmonary artery sling was performed in 44% (37 of 84). The overall mortality was 13% (11 of 84), 7.9% in patients with tracheal stenosis and 28.6% with tracheobronchial stenosis. No deaths occurred in patients with right upper lobe bronchus anatomy. Endoscopic procedures after slide tracheoplasty were required in 34 patients (40.4%). Stents were placed in 18 patients (21.4%), with a higher incidence in those with bronchial trifurcation (42.8%, 6 of 12). Conclusions: This classification appears useful for the morphologic characterization of congenital airway stenosis and could be the benchmark for future prospective studies on the outcome of these patients. © 2012 The Society of Thoracic Surgeons

Is there an optimal timing for surgical ligation of patent ductus arteriosus in preterm infants?

BACKGROUND: We sought to define the variables associated with hospital outcome in preterm infants with patent ductus arteriosus (PDA) and identify the optimal timing for PDA closure to improve hospital outcome. METHODS: Included were 201 premature babies (< or = 32 weeks gestational age), from January 2001 to June 2007, with PDA who received primary medical treatment with ibuprofen. Number of ibuprofen cycles, gestational age, body weight, and presence of symptomatic hypotension requiring vasoactive/inotropic drugs were related to hospital outcome, including hospital mortality, presence of necrotizing enterocolitis, acute renal failure, intraventricular hemorrhage, retinopathy and bronchopulmonary dysplasia at week 36. Data were analyzed with a logistic regression model. RESULTS: Medical treatment was effective in 149 patients (75%), but 52 (25%) required surgical ligation after medical treatment failed. They had younger gestational age (25 weeks [IQR, 24 to 27 weeks] vs 27 weeks [IQR, 25 to 28 weeks], p < 0.0001), lower body weight at birth (730 g [IQR, 595 to 915 g] vs 840 g [IQR, 670 to 1016], p = 0.05), and a higher incidence of symptomatic hypotension (38 of 52 [73%] vs 56 of 149 [38%], p < 0.0001) than patients who responded to ibuprofen. More than two cycles of ibuprofen was significantly associated with an increased risk for bronchopulmonary dysplasia (odds ratio [OR], 2.81; p = 0.03) and acute renal failure (OR, 3.81; p = 0.09). CONCLUSIONS: The prolonged patency of the ductus arteriosus in preterm infants is related to an increased morbidity. Surgical ligation of PDA is a safe and effective treatment and should be done soon after two complete cycles of ibuprofen, especially in selected patients, to improve clinical outcome

Surgical re-utilization of a pulmonary valve graft after failed percutaneous treatment.

J Heart Valve Dis. 2010 Mar;19(2):260-2. Surgical re-utilization of a pulmonary valve graft after failed percutaneous treatment. Vida VL, Speggiorin S, Maschietto N, Padalino MA, Milanesi O, Carminati M, Stellin G. Source Department of Pediatric and Congenital Cardiac Surgery, University of Padua, Padua, Italy. [email protected] Abstract The case is reported of a 22-year-old woman with severe right ventricular outflow tract (RVOT) homograft regurgitation and stenosis, after the repair of tetralogy of Fallot and complete atrioventricular canal, who was scheduled for percutaneous pulmonary valve implantation. In the catheterization laboratory, immediately after implantation, the stented pulmonary valve became dislodged back into the right ventricle. The patient required an emergency re-sternotomy in the operating room. When the RVOT had been incised the stented valve was rescued and successfully repositioned under direct surgical vision. The patient had an uneventful clinical outcome and was discharged home in good clinical condition, with a new, well-functioning pulmonary valve. PMID: 20369515 [PubMed - indexed for MEDLINE

Minimally invasive operation for congenital heart disease: A sex-differentiated approach

OBJECTIVES: Since 1996, we have routinely used a minimally invasive sex-differentiated surgical approach for surgical repair of various simple congenital heart diseases, mostly including a right anterior minithoracotomy in female subjects and a midline ministernotomy in male subjects. METHODS: Between August 1996 and December 2004, all patients who underwent a sex-differentiated surgical approach were included. Hospital results were compared with those of a group undergoing full sternotomy (control subjects). Patients' clinical conditions and satisfaction at follow-up were evaluated. RESULTS: Three hundred eight patients underwent the sex-differentiated surgical approach: (1) minithoracotomy in 147 (47.7%) and (2) ministernotomy in 161 (52.3%). Thirty patients had a full sternotomy for atrial septal defect closure. The most common diagnosis was an atrial septal defect (231 [75%] patients). None of the patients required an extension of the surgical access. There were neither major complications nor hospital deaths. All patients were discharged home without residual defects. Median follow-up time was 71.5 months (range, 48.2-85.7 months). There were no late deaths. No scoliosis, asymmetric breast development, or lactation problems were reported in the minithoracotomy group. Twenty-five (17%) of 147 patients with minithoracotomies complained of a trivial, persistent (<6 months), sensitive skin deficit in the mammary area, most often localized at the inferomedial quadrant. The vast majority of patients (296 [96%] 308 patients) were in New York Heart Association class I, and 282 (91.5%) of 308 patients were satisfied with the cosmetic result of the operation. CONCLUSIONS: The sex-differentiated surgical approach for simple congenital heart disease is a safe procedure, providing both excellent functional and cosmetic results. Anterolateral minithoracotomy is a valid and highly appreciated procedure in female patients