Andrea Lo

McGill University Health Centre, Montréal, Quebec, Canada

Are you Andrea Lo?

Claim your profile

Publications (5)8.28 Total impact

  • [Show abstract] [Hide abstract]
    ABSTRACT: Background: Tube thoracostomies in children are required for multiple indications and can be associated with significant discomfort. In 2010, a multidisciplinary team at our institution developed a protocol to replace stiff chest tubes with 8.5-French soft pleural catheters in children requiring pleural drainage. Methods: Before initiating the protocol, an audit sheet was developed to prospectively capture data regarding insertion, removal, complications, and success. After 8 months of new protocol utilization, these data were reviewed, along with a retrospective review of the patients' charts. Results: Twenty-three patients had 33 pleural catheters inserted over an 8-month period. Mean age was 6.7 years (1 day to 17 years). Indications for insertion were pneumothorax (24%), simple effusion (24%), chylothorax (27%), parapneumonic effusion/empyema (21%), and malignant effusion (3%). Complications included premature dislodgment (33%), blockage (15%), pneumothorax (3%), and bleeding (3%). Mean duration of pleural drainage was 7.27 days (0 to 37 days). Pleural drainage was successful in 91% of patients. Conclusion: Soft pleural catheters are an acceptable alternative to traditional stiff chest tubes in the pediatric population. Premature dislodgment was the most common problem. Prospective audits are extremely valuable in assessing new procedural protocols and practice changes.
    No preview · Article · Feb 2013 · European Journal of Pediatric Surgery
  • [Show abstract] [Hide abstract]
    ABSTRACT: Background: Isolated torsion of the Fallopian tube, without ovarian torsion, is a rare cause of lower abdominal pain. We report our experience with 4 recent cases, along with data from a 20-year review of the pediatric literature. Subjects and methods: The records of 4 cases encountered during a 3-year period were reviewed. A literature review was completed by searching Medline, Medline in Process, Embase, Current Contents, and BIOSIS from 1990 to 2010. Results: All 4 patients were diagnosed on laparoscopy. Laparoscopic salpingectomy was performed in 3 cases and laparoscopic detorsion in 1. All three resected specimens revealed hemorrhage and gangrene of the salpinx, with an associated cyst in one. The pediatric literature review, including our report, revealed 33 case reports and case series with 45 patients. Fifty-six percent of cases represented primary torsion, and 44% were secondary to underlying tubal pathology. Thirty percent of girls were premenarchal. The mean age at presentation and symptom duration were 13.2±2.1 years and 5.8±12.5 days, respectively. Fever and leukocytosis were present in 27% and 63%, respectively. Ultrasound, computed tomography scan, and magnetic resonance imaging showed a sensitivity of 22% (8/36), 14% (1/7), and 40% (2/5), respectively. A correct preoperative diagnosis was considered in only 13%. Eighty-eight percent of cases were treated by salpingectomy, and 12% were treated by tubal detorsion. Long-term outcomes of detorsion were not reported. Conclusions: Isolated salpingeal torsion in girls is rarely diagnosed preoperatively, regardless of imaging technique. Laparoscopy is the intervention of choice for definitive diagnosis and management. Salpingectomy is the most frequent treatment. Detorsion without resection may be considered for selected cases, but the long-term outcomes of this approach are unknown.
    No preview · Article · Oct 2012 · Journal of Laparoendoscopic & Advanced Surgical Techniques
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Advances in care for neonates with esophageal atresia (EA) has improved overall survival rates. Disease-specific prognostic scores for EA assess mortality risk without assessing patient morbidity. We undertook an analysis of these and generic scoring systems evaluating their ability to predict early nonmortality outcomes. We conducted a retrospective review of all patients with EA at our tertiary care children's hospital. Disease-specific (Spitz, Waterston, and Montreal) and generic prognostic scores (Score for Neonatal Acute Physiology II and Score for Neonatal Acute Physiology-Perinatal Extension) were calculated. Outcomes investigated included mortality and early nonmortality outcomes (leak, stricture, and recurrent fistula). These were assessed individually and as a composite "poor outcome" score. Correlations were sought, and receiver operating characteristic curves were generated. Fifty patients were included for analysis, with 5 deaths (10%) in our series. Eight patients developed a postoperative leak, 18 developed stenosis requiring dilatation, and 2 developed refistulization. Overall, 51% of survivors had a poor composite outcome. Although no prognostic score achieved statistical significance, the generic scores outperformed the disease-specific scores in predicting early nonmortality outcomes. Postoperative morbidity remains common in patients with EA. Disease-specific, preexisting prognostic scoring systems do not delineate surviving patients at risk for early complications and appears to underperform when compared with generic prognostic scores.
    Full-text · Article · May 2012 · Journal of Pediatric Surgery
  • [Show abstract] [Hide abstract]
    ABSTRACT: The definition and treatment of gangrenous appendicitis are not agreed upon. We performed a prospective study in children to evaluate an objective definition of gangrenous appendicitis, as well as associated bacteriology, histopathology, and outcomes. Five staff pediatric surgeons prospectively enrolled patients in the study at the time of appendectomy if the following five criteria were met: gray or black discoloration of the appendiceal wall; absence of fecalith outside the appendix; absence of visible hole in the appendix; absence of gross purulence or fibrinous exudate remote from the appendix; and absence of intraoperative appendiceal leak. Peritoneal fluid was cultured, and a standard histopathologic review was undertaken. Persistence of fever (>37.5°C) and ileus was documented daily. Patients were continued postoperatively on ampicillin, gentamicin, and metronidazole until they tolerated diet, manifested a 24-h afebrile period, and had a normal leukocyte count. Hospital stay, readmissions, and infectious complications were recorded. The study took place over a 12-mo period. Thirty-eight patients were enrolled, representing 17% of all patients with appendicitis treated during the year. Average age was 10.8 ± 3.5 y. Peritoneal cultures were positive in 53% of cases. Gangrene was documented histologically in 61% of specimens. Hospital stay was 3.2 ± 1.1 d. There were no postoperative infectious complications or readmissions related to the disease. Neither culture results nor histologic gangrene had a statistically significant effect on hospital stay. An objective definition of gangrenous appendicitis is reproducible and has good histopathologic association. Recovery from gangrenous appendicitis is not influenced by culture or pathology results, and postoperative complications are rare. Limiting postoperative antibiotics to 24 h in gangrenous appendicitis may significantly decrease the cost of treatment without increasing morbidity.
    No preview · Article · Mar 2012 · Journal of Surgical Research

  • No preview · Article · Feb 2012 · Journal of pediatric gastroenterology and nutrition