María Elena Molina

Pontifical Catholic University of Chile, CiudadSantiago, Santiago Metropolitan, Chile

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Publications (17)17.06 Total impact

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    ABSTRACT: A loop ileostomy with intraoperative anterograde colonic lavage has been described as an alternative to colectomy in the management of cases of Clostridium difficile infection refractory to medical treatment. We report a 69 years old diabetic women admitted with a septic shock. An abdominal CAT scan showed a pan-colitis that seemed to be infectious. A polymerase chain reaction was positive for Clostridium Difficile. Due to the failure to improve after full medical treatment, a derivative loop ileostomy and intra-operatory colonic lavage were performed, leaving a Foley catheter in the proximal colon. In the postoperative period, anterograde colonic instillations of Vancomycin flushes through the catheter were performed every 6 hours. Forty eight hours after surgery, the patient improved. A colonoscopy prior to discharge showed resolution of the pseudomembranous colitis.
    Revista medica de Chile 07/2015; 143(5):668-672. · 0.30 Impact Factor
  • Revista medica de Chile 05/2015; 143(5):668-672. DOI:10.4067/S0034-98872015000500016 · 0.30 Impact Factor
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    ABSTRACT: Meckel's diverticulum results from a partial persistence of the omphalomesenteric duct and is the most common congenital anomaly of the gastrointestinal tract, affecting about 2% of the general population. Its presentation as a giant Meckel's diverticulum (>5 cm) is rare and is associated with major complications. We report a case of a 53 year-old woman with constipation for at least ten years. A colonoscopy from eight years ago suggested megacolon. The patient consults in the last month for abdominal pain associated with anorexia. The computed tomography scan image suggested an ileal megadiverticulum. An exploratory laparotomy revealed a saccular dilatation of the distal ileum of 6 x 15.5 cm, located 20 cm away from the ileocecal valve. We resected the involved segment of distal ileum and performed a manual ileo-ascendo anastomosis. The biopsy showed a saccular dilatation of the wall, lined by small intestinal mucosa with areas of gastric metaplasia, supporting the diagnosis of giant Meckel's diverticulum.
    Medwave 10/2014; 14(9). DOI:10.5867/medwave.2014.09.6022
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    ABSTRACT: We have read with great interest the article from Zarate et al "Increasing crude and adjusted mortality rates for colorectal cancer in a developing South American country"(1) . With a large series, they demonstrate that the mortality from colorectal cancer has doubled from 1983 to 2008, and this increase is partly explained by the longer life expectancy, so other factors must be involved. As part of one of the largest colorectal surgery units in an academic hospital in Chile, we share the concerns expressed by the authors and enforce us to develop screening guidelines, improve the surgical outcome and identify risk factors that could be modifiables. This article is protected by copyright. All rights reserved.
    Colorectal Disease 05/2013; 15(6). DOI:10.1111/codi.12196 · 2.35 Impact Factor
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    ABSTRACT: Background: The neutrophil/lymphocyte ratio is an effective marker of inflammation ana can have prognostic value in surgical patients. Aim: To evaluate the effect of an increased neutrophil/lymphocyte ratio (NLR) on perioperative complications ana overall ana disease-free survival in patients undergoing elective resection for stage II colon cancer. Material and Methods: Data was obtained from clinical charts, preoperative blood results and hospital records of all patients undergoing an elective curative resection for colon cancer, between 2000 and 2007. Preoperative NLR was calculated. Follow-up was obtained from a prospectively maintained colorectal cancer database, clinical records and questionnaires. Uni and multivariable analysis were performed to identify associations, and survival analysis was performed using Kaplan-Meier curves. Results: One hundred twenty two patients with a mean age of69years (52% males), were evaluated. Median follow-up was 73 months, and overall survival for 1 and 5years was 95% and 68%, respectively. On a multivariable analysis after adjusting for age, sex, tumor depth invasion, use of adjuvant therapies and American Society of Anesthesiology preoperative risk score, an NLR > 5 was associated with an increased perioperative complication rate (odds ratio: 3,06, p = 0,033). Kaplan-Meier survival analysis showed a worse overall and disease-free survival for patients with NLR greater than five. Conclusions: A preoperative NLR of five or more is associated with greater perioperative morbidity and worse oncological outcomes in patients undergoing resection for elective stage II colon cancer.
    Revista medica de Chile 05/2013; 141(5):602-608. DOI:10.4067/S0034-98872013000500008 · 0.30 Impact Factor
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    ABSTRACT: In a randomized double-blind study the therapeutic effect of a novel zinc-aluminium ointment was compared with placebo in patients with faecal incontinence. A randomized double-blind trial was performed. Patients who met the inclusion criteria were randomized to receive the ointment or a placebo. All were evaluated prior to and 3 weeks after ointment application, using the Wexner incontinence score and the Fecal Incontinence Quality of Life (FIQL) score. Fifty patients were randomized and six were lost to follow-up, leaving 24 in the treatment and 20 in the placebo group. The average ages were 61.3 and 60.7 years. The respective Wexner scores prior to intervention were 16.6 and 16.7. They decreased significantly after treatment to 8.5 and 13.1 (P<0.001 and P=0.002 respectively). There was a significant difference in the final scores, favouring the treatment group (P=0.001). The FIQL scores for the treatment group were also significantly better in all parameters compared with those of the placebo group. The study shows that the zinc-aluminium based ointment decreases faecal incontinence significantly compared with placebo.
    Colorectal Disease 07/2011; 14(5):596-8. DOI:10.1111/j.1463-1318.2011.02728.x · 2.35 Impact Factor
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    ABSTRACT: IntroductionIntestinal passage reconstruction after Hartmann's (PRH) operation is associated with a high morbidity and mortality of about 1%. Despite the increasing use of laparoscopy as an alternative in PRH, there is a lack of patient series at international level.
    Cirugía Española 11/2010; 88(5):314-318. DOI:10.1016/j.ciresp.2010.08.002 · 0.74 Impact Factor
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    ABSTRACT: Intestinal passage reconstruction after Hartmann's (PRH) operation is associated with a high morbidity and mortality of about 1%. Despite the increasing use of laparoscopy as an alternative in PRH, there is a lack of patient series at international level. The prospective series of patients subjected to (PRH) by laparoscopy was analysed using the demographic parameters, ASA classification, reason for primary surgery, time between initial surgery and reconstruction, operation time, conversion to open surgery, bowel rest recovery time, complications, hospital stay and follow up. A total of 30 patients with a mean age of 61.5 ± 13 years were operated on using laparoscopy. The ASA classification was 1.8 ± 0.3 the BMI was 26.1 ± 2 Kg/m(2). A total of 63% were admitted due to complicated Hinchley III or IV acute diverticulitis. The interval between initial surgery and the passage reconstruction was 7.1 ± 2 months. Conversion to open surgery was necessary in three cases. The mean intestinal passage recovery was 2.1 ± 1 days and the hospital stay was 5.6 ± 1 days. The long-term complications were one mechanic ileum due to bridles and one case of anastomotic stenosis. The post-Hartmann laparoscopic passage reconstruction is associated with a short intestinal motility recovery time, as well as a less prolonged hospital stay compared to an open surgery series. Randomised studies are needed to determine whether laparoscopic reconstruction is superior to the conventional technique.
    Cirugía Española 10/2010; 88(5):314-8. DOI:10.1016/S2173-5077(10)70037-5 · 0.74 Impact Factor
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    ABSTRACT: Histopathological studies have shown the presence of oestrogenic receptors in the anal sphincter, which presumes a role in muscular trophism for circulating oestrogens. This could explain the increase in faecal incontinence (FI) in postmenopausal women. To evaluate the effect of topical oestrogens (TE) in controlling symptoms of FI in postmenopausal women. Hypothesis The application of TE in postmenopausal women with FI improves continence. We performed a prospective double-blind randomized trial applying TE to the anal mucosa in postmenopausal women with FI. Study period: 2005-2006. The patients were randomized into two groups: I--topical estriol, II--placebo. In both groups, the ointment was applied three times daily for a period of 6 weeks. We compared Wexner's FI score and the FI quality of life scale, before commencing and after 6 weeks of application. In this period we evaluated 36 patients. Average age: 67 years (48-84). Group I: 18 patients and group II: 18 patients, one patient was excluded. Wexner's FI score in group I was 11 (5-18) and 7 (0-19) with pre- and postapplication respectively (P = 0.002). Wexner's FI score in group II was 12 and 9 with pre- and postapplication respectively (P = 0.013). When we compared the results between both groups, this was not statistically significant (P = 0.521). There is improvement of continence in both groups that had the ointment applied; nonetheless this study could not show that TE improves FI more than a placebo does.
    Colorectal Disease 05/2009; 11(4):390-3. DOI:10.1111/j.1463-1318.2008.01624.x · 2.35 Impact Factor
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    ABSTRACT: The laparoscopic approach is an alternative for the elective treatment of diverticular colon disease (DCD). To analyze the results of patients electively operated for DCD using a laparoscopic technique. Data of patients with DCD operated using laparoscopy at the Catholic University of Chile Clinical Hospital were prospectively recorded from January 1999 to August 2006. Indications for surgery were repetitive crises of acute diverticulitis, the persistence of the symptoms or anatomic deformity after the first crisis and complicated diverticulitis (Hinchey 1-2) that responded to the medical treatment. The laparoscopic technique used five ports and the surgical specimen was extracted through a suprapubic approach. One hundred and six patients aged 32 to 82 years (49% females) were operated in the study period. Fifty five percent had a previous abdominal surgery. The mean operative time was 213 minutes (range: 135-360). Four patients were converted to open surgery (3.7%). One or more early post-operative complications were observed in five patients (4.7%). The mean time for passing gases and reinitiate liquid diet was 1.7 and 2.4 days respectively. The median post operative stay after surgery was 4 days. There was no operative mortality. Mean follow-up time was 27 months and only one patient (0.9%) had a new episode of acute diverticular disease, with a satisfactory response to medical treatment. No patient has developed bowel obstruction. CONCLUSIONs: The laparoscopic approach is a safe alternative in the elective surgical treatment of DCD.
    Revista medica de Chile 06/2008; 136(5):594-9. · 0.30 Impact Factor
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    ABSTRACT: Total colectomy is the surgery of choice for colonic inertia (CI) when medical treatment has failed. Laparoscopic total colectomy has demonstrated to be a feasible technique. Present our experience in patients with CI who underwent laparoscopic total colectomy (TC) + ileorectoanastomosis (IRA) and evaluate the functional results and medium-term follow-up after this surgery. All patients with CI were included in a prospective laparoscopic surgical protocol, from 2002 to 2007. These patients had a complete work-up for chronic constipation (clinical records, barium enema, colonic transit time, defecography, anorectal manometry, small bowel follow through). All patients were evaluated with Wexner's score for constipation pre- and postoperatively, asked if they would recommend surgery to other patients, and if they were satisfied with the procedure (on a scale from 1 to 10). Statistical analysis was carried out using Student's T-test. In this period 20 patients were operated with diagnosis of CI. All patients were females with an average age of 41.5 years (range 18-52 years). Mean operative time was 248 min (range 170-360 min). One (5%) patient was converted to open surgery. The medium time to flatus per anum and feeding was 2 (range 1-6) and 3 (range 2-6) days, respectively. The medium postoperative stay was 7 days. Seven patients (35%) presented surgical postoperative complications (three postoperative ileus, one portal thrombosis, one rectal hemorrhage, one anastomotic leakage, and one hemoperitoneum). There was no postoperative mortality. The average follow-up was 25 months (range 1-60 months). Preoperative Wexner's constipation score was 22.3 (range 19-29 months) pre surgery and at the end of follow-up was 1.8 (range 0-6) (p < 0.01). The medium level of satisfaction was 8 (range 2-10) and only one patient would not recommend surgery to other patients. The laparoscopic access is a safe technique with satisfactory functional results after medium-term follow-up.
    Surgical Endoscopy 04/2008; 23(1):62-5. DOI:10.1007/s00464-008-9901-4 · 3.26 Impact Factor
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    ABSTRACT: INTRODUCTION: Slow-transit constipation after proper diagnosis and extensive medical therapy may have a surgical solution. Total abdominal colectomy and ileorectal anastomosis, at our institution, is the surgical procedure of choice. Nonetheless, patients may reject this alternative because of morbidity. DISCUSSION: We report two cases of slow-transit constipation diagnosed after a thorough investigation with two colonic transit tests showing slow-transit constipation, a normal anorectal manometry, balloon expulsion test, small-bowel follow-through, defecography, laboratory and psychologic tests. The patients rejected standard surgical treatment (total colectomy + ileorectal anastomosis). A colonic bypass with an ileorectal anastomosis, leaving the colon in situ, was offered and accepted by the two patients. This was performed laparoscopically liberating the cecum and terminal ileum, transecting the terminal ileum through a small suprapubic incision, and anastomosing the terminal ileum to the rectosigmoid junction intracorporeally. The total surgical time was 50 and 60 minutes, respectively. Both patients made uneventful recoveries and were discharged on the fourth postoperative day. They have completed four and two months of close follow-up and at present have one to four bowel movements per day with mild abdominal distension and pain. To our knowledge this is the first report of colonic bypass for the treatment of slow-transit constipation.
    Diseases of the Colon & Rectum 02/2008; 51(1):139-41. DOI:10.1007/s10350-007-9088-0 · 3.75 Impact Factor
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    Revista medica de Chile 01/2008; 136(5). DOI:10.4067/S0034-98872008000500007 · 0.30 Impact Factor
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    ABSTRACT: Han pasado 15 años desde la primera publicación de una cirugía laparoscópica por cáncer colorrectal (CLCC) y finalmente parece ser que la evidencia la apoya, e incluso para algunos autores es indiscutible que se obtendrían mejores resultados. En nuestra institución, el año 1998 se dio inicio a un protocolo en cirugía laparoscópica de colon, para abordar los casos oncológicos en forma progresiva y de acuerdo al avance en la curva de aprendizaje. El objetivo de este trabajo es analizar los resultados inmediatos y la seguridad de la resección oncológica en pacientes sometidos a una CLCC. Material y Método: Este es un trabajo prospectivo que incluye a todos los pacientes operados por cáncer colorrectal en el marco de un protocolo de desarrollo de la cirugía laparoscópica. Resultados: Entre septiembre de 1998 y agosto de 2004 se efectuaron 131 cirugías laparoscópicas colorrectales; en 32 (24%) de ellos el motivo de la intervención fue un cáncer colorrectal. La edad promedio fue 64 años (i: 26-88) y el 47% correspondió al sexo femenino. El tumor se encontraba localizado en el recto en 9 pacientes y en los 23 restantes en el colon (derecho 6, izquierdo 7 y sigmoides 10). La resección del tumor fue realizada con intención curativa en 29 pacientes. Las operaciones practicadas fueron: resección de colon sigmoides en 10 pacientes, hemicolectomía izquierda en 7, hemicolectomía derecha en 6, resección anterior baja en 4, resección abdóminoperineal en 3 y proctocolectomía más reservorio ileal en 2 pacientes. En 4 pacientes fue necesario convertir a cirugía convencional (12%) por dificultad anatómica. Una o más complicaciones se observaron en 8 pacientes (morbilidad de 25%) y un paciente fallece en la serie. El promedio de ganglios recuperados en la pieza operatoria fue 23 (4-86) y en ningún paciente se observó un margen microscópico positivo. De acuerdo a la etapificación TNM, los pacientes fueron clasificados como etapa I, II, III y IV el 31%, 28%, 28% y 13% respectivamente. La mediana del restablecimiento del tránsito a gases, realimentación con sólidos y estadía hospitalaria fue 2 días, 3 días y 5 días. Todos los pacientes han acudidos a controles postoperatorios regulares (promedio de seguimiento 16.4 meses) sin observar implantes en sitios de trocares en ninguno de ellos. No se ha observado progresión tumoral en ninguno de los pacientes etapa I y II. Conclusión: El trabajo en el marco de un protocolo permite obtener resultados seguros y similares a los publicados después de cirugía convencional. Considerando los resultados en las piezas operatorias y un seguimiento a corto plazo, se sugiere que la CLCC mantiene los criterios de seguridad oncológica de la cirugía convencional.
    01/2006; 58(2). DOI:10.4067/S0718-40262006000200006
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    ABSTRACT: SUMMARY In the chirurgical treatment of hemorrhoidal pathology the use of a circular stapler associated to less pain in the postoperatory period and an early return to normal activity has been reported. The purpose of this study was to evaluate the results of stapled circumferential mucosectomy in patients with hemorrhoidal Rev. Chilena de Cirugía. Vol 57 - Nº 3, Junio 2005; págs. 239-244

Publication Stats

41 Citations
17.06 Total Impact Points


  • 2006–2015
    • Pontifical Catholic University of Chile
      • Departamento de Cirugía Digestiva
      CiudadSantiago, Santiago Metropolitan, Chile
  • 2008
    • University of Santiago, Chile
      CiudadSantiago, Santiago, Chile