Direct trocar insertion without previous pneumoperitoneum versus insertion after insufflation with Veress needle in laparoscopic gynecological surgery: a prospective cohort study.

The aim of this study was to determine whether direct trocar entry without prior pneumoperitoneum at umbilical level (DTI) can be a safe alternative to access the abdominal cavity in gynaecological laparoscopic surgery. We present a prospective observational analytical study of cohorts, comparing DTI with umbilical entry with trocar after previous insufflation with a Veress needle at umbilical level (V). The study period was performed from June 2013 to April 2016; data was collected on 600 patients who underwent gynaecological laparoscopic surgery. There were no significant differences in the risk of suffering a complication during the access manoeuvres between DTI (6.49%) and V (7.39%), OR 0.89 (95% CI: 0.42-1.81). The duration of the access manoeuvres was 69 s in DTI and 193 s in V (p < .001). The percentage of patients in whom two or more access attempts were performed was lower in DTI (7.8%) than in V (12.3%) (p > .05). We concluded that DTI is at least as safe as V, regarding the risk of suffering complications arising from access into the abdominal cavity. DTI has advantages with regard to V, such as: the shorter duration of access manoeuvres or the lesser number of unsuccessful entry or insufflation attempts. Impact statement What is already known on this subject? There are few international publications comparing DTI and V. When we conducted a search in PubMed for the terms 'Veress needle and direct trocar insertion', 51 publications were obtained. When we increased the restriction and added the terms 'laparoscopic entry and laparoscopy complications', 27 publications were obtained; thus, the uniqueness of our study. What do the results of this study add? We present a 3-year observational prospective study of cohorts that included 600 patients. The aim of this study was to determine that in laparoscopic gynaecological surgery, DTI is an access method to the abdominal cavity at least as safe as V, with respect to the risk of complications. On the other hand, DTI has some advantages such as the shorter duration of access manoeuvres or the lower number of failed entry attempts. What are the implications of these findings for clinical practice and/or further research? Given the limited number of publications that compared both techniques, our study indicates that DTI can be a safe alternative for access to abdominal cavity in gynaecological surgery, compared to the traditional V.

Warm and Humidified Versus Cold and Dry CO2 Pneumoperitoneum in Minimally Invasive Colon Resection: A Randomized Controlled Trial.

INTRODUCTION: Peritoneal insufflation with warm-humidified (WH) CO2 gas during minimally invasive surgical procedures is purported to prevent hypothermia and peritoneal desiccation and is associated with decreased postoperative IL-6 levels. This randomized study's purpose was to determine the clinical impact of WH versus cold-dry (CD) CO2 in minimally invasive colon resection (MICR), and to assess perioperative plasma levels of IL-6, TIMP-1, sVEGF-R1, and HSP-70 after MICR. METHODS: Operative and short-term clinical data plus perioperative blood samples were collected on MICR patients randomized to receive either WH (36.7°C, 95% humidity) or CD (room temperature, 0% humidity) CO2 perioperatively. Peritoneal biopsies were taken at the start and end of surgery. Outcomes tracked included core temperature, postoperative in-hospital pain levels, analgesia requirements, and standard recovery parameters. Preoperative and postoperative days (PODs) 1 and 3 plasma protein levels were determined via ELISA. RESULTS: A total of 101 patients were randomized to WH CO2 (50) or CD CO2 (51). The WH group contained more diabetics ( P = .03). There were no differences in indication, minimally invasive surgical method used, or core temperature. Pain scores were similar; however, the WH patients required less narcotics on PODs 1 to 3 ( P < .05), and less ketorolac on PODs 1 and 2 ( P < .03). No differences in length of stay, complication rates, or time to flatus/diet tolerance were noted. Plasma levels of the 4 proteins were similar postoperatively. Though insignificant, the WH group had less marked histologic changes on "end-of-case" peritoneal biopsies. CONCLUSION: This study found significantly lower pain medication requirements for PODs 1 to 3 for the WH group; however, because there were no differences in the pains scores between the groups, firm conclusions regarding WH CO2 cannot be made.

Impact of Scoliosis on Laparoscopic Nissen Fundoplication.

AIM: Scoliosis, which is often associated with neurological impairment in children, sometimes makes it difficult to perform laparoscopic procedures. This study assessed the impact of scoliosis on performing laparoscopic Nissen fundoplication. METHODS: Medical records and radiographic examinations of patients who underwent laparoscopic Nissen fundoplication at a single institution from 2006 to 2015 were reviewed retrospectively. Patients' data on age at surgery, height, weight, duration of pneumoperitoneum, and amount of bleeding were collected. The Cobb angle was measured using X-rays, and the direction (right or left) of the scoliotic curve was recorded. The chest compression ratio was calculated using computed tomography axial images. RESULTS: Eighty-five patients were included and analyzed in this study, of which 89% were neurologically impaired. Median age, height, and weight were 120 months, 110 cm, and 17 kg, respectively. A positive correlation between age and the Cobb angle (ρ = 0.64) and a negative correlation between age and the chest compression ratio (ρ = -0.56) were observed. The right-curved scoliotic group showed significantly more bleeding than the nonscoliotic (<10°) group (P = .01; nonscoliotic, 0 mL; right curved, 7.5 mL; left curved, 0 mL). The severe scoliotic group (≥45°) showed more bleeding than the nonscoliotic group (P = .02). Neither the direction of the scoliotic curve nor scoliotic severity showed a significant difference in the duration of pneumoperitoneum. CONCLUSIONS: The older the patient, the more severe their scoliosis and chest compression were. Right-curved or severe scoliosis could be risk factors for intraoperative bleeding in laparoscopic Nissen fundoplication.

Shoulder pain following laparoscopic cholecystectomy: factors affecting the incidence and severity.

BACKGROUND: Laparoscopic cholecystectomy (LC) has become the standard treatment for gall bladder disease. However, despite its low degree of invasiveness, many patients complain of postoperative pain and postoperative nausea/vomiting. This study was planned to evaluate different factors affecting the incidence and severity of postoperative shoulder-tip pain after LC. PATIENTS AND METHODS: One hundred consecutive patients who were treated for gall bladder stone by LC at the Gastroenterology Surgical Center, Mansoura University, Mansoura, Egypt, during the period from October 2008 to January 2010, were randomized according to different pnemoperitonum pressures (8, 10, 12, and 14 mm Hg). Each group comprises 25 patients. RESULTS: There were 62 patients reported to have postoperative shoulder-tip pain during the first 12 hours after operation, which decreased to 9 patients on the 10th postoperative day. A significant difference was observed in the prevalence of pain at different pressures, 11% with low pressure and increased to 20% with high pressure. The incidence of shoulder-tip pain was significantly more in patients with a longer duration of the operation of >45 minutes at 12 hours (23 [76.7%] versus 39 [55.7%]; P = 0.04), at 24 hours (23 [76.7%] versus 29 [41.4%]; P = 0.009), and at 3 days postoperatively (19 [63.3%] versus 20 [28.6%]; P = 0.01). The volume of used gases during the operation had no effect on the incidence or severity of shoulder-tip pain after LC. Also, the use of intraoperative analgesics had no effect on the incidence or severity of shoulder-tip pain after LC. CONCLUSIONS: The origin of pain after LC is multifactorial. We recommend the use of the lower pressure technique during LC, and as patients with and without drains have similar incidence of postoperative shoulder pain, drains should not be used with the intention of preventing shoulder pain.

The safety of CO2 pneumoperitoneum for elderly patients during laparoscopic colorectal surgery.

OBJECTIVE: The aim of this study was to compare the anesthetic outcomes of elderly and younger patients perioperatively, and to evaluate the safety of this procedure in elderly. METHODS: A total of 25 patients undergoing elective laparoscopic colorectal surgery were enrolled in this study prospectively. Ten patients were more than or equal to 70 years (Group E) and 15 patients were less than or equal to 69 years (Group Y). The parameters between groups for perioperative hemodynamics, arterial blood chemistry, and perfusion of intraabdominal organs were recorded and compared periodically from before induction of anesthesia till after the operation. RESULTS: Group E had a higher ASA degree (P<0.01) than group Y. During the operation, the HCO3 and PaCO2 value increased whereas the pH value decreased significantly. All these parameters recovered gradually at the end of the surgery; some serum electrolytes decreased, especially K and Ca. The central venous pressure increased after volume expansion and the beginning of operation, and then decreased postoperatively. Mean arterial pressure had a marked change during volume expansion period and early after the induction of anesthesia. pHi decreased when the operation began. PgCO2 increased significantly at the end of the surgery. Central venous pressure of group E was higher than that of group Y at 5 minutes during operation, whereas mean arterial pressure of elder group was lower than that of younger group at 15 minutes after the end of operation. Other hemodynamic parameters did not differ significantly from the results. CONCLUSION: There is no significantly adverse effect for elderly patients during perioperative period. Adequate intraoperative administration and monitoring are beneficial for maintaining a safe anesthesia.

Effects of the beach chair position, positive end-expiratory pressure, and pneumoperitoneum on respiratory function in morbidly obese patients during anesthesia and paralysis.

BACKGROUND: The authors studied the effects of the beach chair (BC) position, 10 cm H2O positive end-expiratory pressure (PEEP), and pneumoperitoneum on respiratory function in morbidly obese patients undergoing laparoscopic gastric banding. METHODS: The authors studied 20 patients (body mass index 42 +/- 5 kg/m2) during the supine and BC positions, before and after pneumoperitoneum was instituted (13.6 +/- 1.2 mmHg). PEEP was applied during each combination of position and pneumoperitoneum. The authors measured elastance (E,rs) of the respiratory system, end-expiratory lung volume (helium technique), and arterial oxygen tension. Pressure-volume curves were also taken (occlusion technique). Patients were paralyzed during total intravenous anesthesia. Tidal volume (10.5 +/- 1 ml/kg ideal body weight) and respiratory rate (11 +/- 1 breaths/min) were kept constant throughout. RESULTS: In the supine position, respiratory function was abnormal: E,rs was 21.71 +/- 5.26 cm H2O/l, and end-expiratory lung volume was 0.46 +/- 0.1 l. Both the BC position and PEEP improved E,rs (P < 0.01). End-expiratory lung volume almost doubled (0.83 +/- 0.3 and 0.85 +/- 0.3 l, BC and PEEP, respectively; P < 0.01 vs. supine zero end-expiratory pressure), with no evidence of lung recruitment (0.04 +/- 0.1 l in the supine and 0.07 +/- 0.2 in the BC position). PEEP was associated with higher airway pressures than the BC position (22.1 +/- 2.01 vs. 13.8 +/- 1.8 cm H2O; P < 0.01). Pneumoperitoneum further worsened E,rs (31.59 +/- 6.73; P < 0.01) and end-expiratory lung volume (0.35 +/- 0.1 l; P < 0.01). Changes of lung volume correlated with changes of oxygenation (linear regression, R2 = 0.524, P < 0.001) so that during pneumoperitoneum, only the combination of the BC position and PEEP improved oxygenation. CONCLUSIONS: The BC position and PEEP counteracted the major derangements of respiratory function produced by anesthesia and paralysis. During pneumoperitoneum, only the combination of the two maneuvers improved oxygenation.

Major and minor injuries during the creation of pneumoperitoneum. A multicenter study on 12,919 cases.

BACKGROUND: Lap Group Roma was established in 1999 to promote and control the development of laparoscopic surgery in the area of Rome and its province. Complications during the creation of pneumoperitoneum were given a high priority of investigation, and a retrospective enquiry was immediately carried out. METHODS: A questionnaire about all laparoscopic surgical practice performed from January 1994 to December 1998 was sent to the supervisors of 28 centers of general surgery in the area of Rome and its province participating to the Lap Group Roma, requesting demographics, type of procedure for the creation of pneumoperitoneum, type and timing of operation, and major vascular, visceral, and minor vascular injuries related to the creation of pneumoperitoneum. RESULTS: The questionnaire was returned by 57% of the centers, for a total of 12,919 laparoscopic procedures. The type of procedure used to create the pneumoperitoneum involved a standard closed approach (Veress needle + first trocar) in 82% of the cases, an open (Hasson) approach in 9% of the cases, and the use of an optical trocar in 9% of the cases. There were seven major vascular injuries (0.05%), eight visceral lesions (0.06%), and nine minor vascular lesions (0.07%), for an overall morbility of 0.18%. There was no death related to these complications. The rate of complications differed significantly (p < 0.0001) depending on the type of approach used. It was 0.27% with the optical trocar (3 of 1,009 cases), 0.18% with the closed approach (20 of 10,664 cases), and 0.09% with the open approach (1 of 1,135 cases). CONCLUSIONS: There is no foolproof technique for the creation of pneumoperitoneum, and this inquiry confirms the need of a constant search for prevention and early treatment of complications encountered during this obligatory phase of any laparoscopic approach. A well-conducted and prolonged prospective audit of clinical practice could help in identifying the risk factors that can make an alternative approach (open or video controlled) preferable to the widely used closed approach.

Gasless laparoscopy could avoid alterations in hepatic function.

BACKGROUND: In a previous clinical study, we showed that the duration and level of pneumoperitoneum are responsible for changes in hepatic function during laparoscopic procedures. These findings encouraged us to evaluate hepatic function during laparoscopy with and without carbon dioxide (CO(2)) pneumoperitoneum in a clinical setting. METHODS: We performed 63 laparoscopic cholecystectomies and 30 non-hepatobiliary laparoscopic procedures in 93 consecutive patients with normal preoperative liver function tests. The anesthesiologic protocol was uniform, using drugs at low hepatic metabolism. We performed laparoscopic cholecystectomies in 43 patients with a pneumoperitoneum; in the remaining 20, we used a gasless technique. We randomized the 43 laparoscopic cholecystectomies into 23 performed with pneumoperitoneum at 14 mmHg and 20 performed at 10 mmHg. All non-hepatobiliary laparoscopic procedures were performed with a pneumoperitoneum of 14 mmHg. The postoperative serologic levels of AST, ALT, and bilirubin, and the prothrombin time were measured at 6, 24, 48, and 72 h. The alterations in the serologic hepatic tests were then related to the type of procedure, its duration, and the level of pneumoperitoneum. RESULTS: The study group was comprised of 93 patients, 39 male and 54 female, with a mean age of 50.5 years (range, 15-74). There were no deaths. There was no morbidity in the pneumoperitoneum group, but there was one case of accidental omental injury during the placement of the abdominal, wall retractor in the gasless group. All patients had postoperative changes in serologic hepatic tests. Slow return to normality occurred 48 or 72 h after the operation. The increase in AST and ALT was statistically significant and correlated to the level and duration of pneumoperitoneum. The serologic change in the gasless group were significantly lower than in the laparoscopic cholecystectomy group with pneumoperitoneum at 14 mmHg. There was no statistically significant difference between the gasless group and the laparoscopic cholecystectomy group with pneumoperitoneum at 10 mmHg. There was a statistically the significant increase in the non-hepatobiliary laparoscopy group over the gasless group, despite the absence of hepatobiliary injuries in the first group. No symptoms were related to these serologic hepatic changes. CONCLUSIONS: The gasless technique causes smaller alterations in serological hepatic parameters than pneumoperitoneum at 14 mmHg. By contrast, the gasless technique and low-pressure pneumoperitoneum have the same effect on hepatic function. Therefore, the use of a subcutaneous abdominal wall retractor combined with a low-pressure pneumoperitoneum is recommended for patients with severe hepatic failure. Transaminases

Influence of nitrous oxide anesthesia on venous gas embolism with carbon dioxide and helium during pneumoperitoneum.

BACKGROUND: Gas embolism is a potential hazard during laparoscopic procedures. The aim of this study was to evaluate the effects of nitrous oxide (N(2)O) inhalation in the case of gas embolism with carbon dioxide (CO(2)) and helium during pneumoperitoneum. METHODS: For this study, 20 anesthetized pigs were ventilated with N(2)O (67% inspired) in O(2) (n = 10) or with halothane (0.7-1.5 inspired) in O(2) (n = 10). In each group, CO(2) (n = 5) or helium (n = 5) pneumoperitoneum was established and gas embolism induced at different rates (CO(2) at 0.5, 1, or 2 ml/kg/min; helium at 0.025, 0. 05, or 0.1 ml/kg/min) through the left femoral vein a maximum of 10 min while all hemodynamic parameters were continuously monitored. RESULTS: In the CO(2) group without N(2)O, all the animals tolerated rates of 0.5 and 1 ml/kg/min over the 10 min, whereas only 3 of 4 animals in the CO(2) group with N(2)O tolerated a rate of 0.5 ml/kg/min, and 2 of 4 animals a rate of 1 ml/kg/min. In the helium group without N(2)O, all the animals tolerated gas embolism at all rates, whereas in the helium group with N(2)O, 4 of 5 animals needed to be resuscitated at a rate of 0.1 ml/kg/min and one death occurred. CONCLUSIONS: Inhalation of N(2)O worsens the negative cardiovascular effects of venous CO(2) or helium gas emboli and increases the risk of emboli-induced death when CO(2) or helium are used to establish pneumoperitoneum. The volume of venous venous helium gas emboli causing such effects is substantially smaller than that for venous CO(2) gas emboli.

[The transesophageal echocardiographic evaluation of the hemodynamic effects of the pneumoperitoneum in laparoscopic hemicolectomy]. / Valutazione con ecocardiografia transesofagea degli effetti emodinamici del pneumoperitoneo nell'emicolectomia per via laparoscopica.

MATERIALS AND METHODS: Ten patients undergoing laparoscopic left hemicolectomy were monitored by transesophageal echocardiography in order to assess the effects of pneumoperitoneum and head-down tilt on the following parameters: end-diastolic left ventricular volume, stroke volume, cardiac output, left ventricular ejection fraction, mean blood pressure and cardiac frequency. Pneumoperitoneum, by a mean CO2 pressure of 13 mmHg, was performed in five of them; for the other patients, mechanical abdominal wall suspension was used, without any increase in abdominal pressure. RESULTS: The group treated by abdominal wall suspension underwent an increase in end-diastolic left ventricular dimension, stroke volume, cardiac output and blood pressure, while the group treated by pneumoperitoneum had no significant changes in hemodynamic parameters. CONCLUSIONS: In this surgical context, pneumoperitoneum seems to be safe and to have a low hemodynamic impact, as its effects on venous return seem to be opposite to those of the Trendelenburg position.

Hemodynamic changes in the inferior caval vein during pneumoperitoneum. An experimental study in pigs.

BACKGROUND: Laparoscopic procedures of increasing difficulty and duration are becoming more and more common. This may cause significant challenges to the circulatory system and possibly influence thrombogenicity. METHODS: Experimental study of carbon dioxide pneumoperitoneum in pigs. RESULTS: Inferior caval vein blood flow remained unchanged, whereas inferior caval vein pressure increased during pneumoperitoneum. Inferior caval vein, pulmonary, and systemic vascular resistance increased during pneumoperitoneum and remained increased after exsufflation. CONCLUSIONS: Pneumoperitoneum leads to an increased inferior caval vein pressure, which could cause a dilation of peripheral veins. The similar patterns of vascular resistance in the inferior caval vein, pulmonary artery, and systemic arteries (a gradual increase remaining elevated after exsufflation) suggest a common humoral factor or increased sympathetic nerve activity.

Routine use of open technique in laparoscopic operations.

BACKGROUND: The "blind" insertion of the Veress needle for insufflation of the peritoneal cavity with subsequent closed placement of the first trocar during laparoscopic abdominal procedures can result in severe major vascular and visceral injuries. An open technique was proposed as an alternative method for insufflation in patients with abdominal scars to reduce the possibility of such complications. The aim of this article is to report the results of our experience with the routine use of open technique in laparoscopic surgery. STUDY DESIGN: Open technique was routinely used and prospectively evaluated in 330 patients who underwent laparoscopic procedures. RESULTS: Laparoscopic conversion was necessary in 25 out of 330 cases (7.6 percent): in 20 cases for unclear biliary anatomy during laparoscopic cholecystectomy, and in 5 cases for minor hemorrhage that could not be managed by laparoscopy. In the 305 procedures completed by laparoscopy, 11 patients (3.6 percent) had 13 postoperative complications. These complications were all of minor importance and were always unrelated to trocar insertion; in particular, no major vascular or visceral injuries were observed. CONCLUSIONS: Routine use of open technique for pneumoperitoneum represents the best prevention of most of the severe trocar-related complications that are potentially avoidable.

Colecistectomía laparoscópica sin neumoperitoneo / Laparoscopic Cholecystectomy without pneumoperitoneum

Se presenta la experiencia personal en el tratamiento de la colelitiasis por vía laparoscópica sin neumoperitoneo. Entre enero de 1993 y septiembre de 1994 se realizaron un total de 50 colecistectomías. Se describe la técnica quirúrgica y los instrumentos utilizados para el procedimiento. Las edades fluctuaron entre 24 y 69 años; se operaron 14 hombres y 36 mujeres. La media del tiempo operatorio fue de 63 minutos con un margen de 30 a 90 min., la estadía hospitalaria media fue de 2 días. No se presentaron complicaciones operatorias ni postoperatorias con esta técnica

The adverse hemodynamic effects of laparoscopic cholecystectomy.

Recent studies suggest that significant physiologic derangements can occur during laparoscopic surgery. Eighteen patients admitted for laparoscopic cholecystectomy were studied. The mean age was 46.7 (range 19-78). A standard anesthetic technique, reverse Trendelenburg positioning, and an abdominal insufflation pressure of 15 mmHg with CO2 were used with all subjects. Central venous pressure (CVP) and arterial pressures were measured invasively. Stroke volume and cardiac index were calculated using quantitative transesophageal echocardiography. Baseline measurements were taken after induction. Additional measurements were taken at 15-min intervals throughout the procedure. There was a statistically significant increase in mean arterial pressure (15.9%), systolic blood pressure (11.3%), diastolic blood pressure (19.7%), and CVP (30.0%) from control baseline values. Significant decreases in stroke volume (29.5%) and cardiac index (29.5%) occurred within 30 min of the induction of pneumoperitoneum and positioning (P < 0.05, ANOVA). Laparoscopic cholecystectomy significantly and reversibly decreases cardiac performance. Compromised patients may be at increased risk for complications not previously recognized with this procedure.

Hemodynamic changes during laparoscopic cholecystectomy monitored with transesophageal echocardiography.

Although pneumoperitoneum has been well tolerated in a predominantly healthy population, there is concern that an increased intraperitoneal pressure may be poorly tolerated in patients with marginal cardiopulmonary function. The purpose of this study was to demonstrate noninvasively the hemodynamic effects of carbon dioxide pneumoperitoneum utilizing biplane transesophageal echocardiography. Fourteen otherwise-healthy patients undergoing nonemergent laparoscopic cholecystectomy were studied using bi-plane transesophageal echocardiography under a standardized anesthetic protocol utilizing isoflurane, fentanyl, and vecuronium bromide. End-tidal CO2, oxygen saturation, cardiac rhythm, temperature, and blood pressure were monitored noninvasively. Minute ventilatory volume was adjusted as needed to keep end-tidal CO2 less than 38 mmHg. Data were recorded at baseline, following abdominal insufflation to 15 mmHg with CO2, with head-up tilt of 20 degrees, following exsufflation, and with the patient level. Significance was determined using a paired Student t-test. Insufflation to 15 mmHg decreased cardiac index (C.I.) by 3% (3.34 to 3.23 l/min/m2) while both heart rate (HR) and mean arterial pressure (MAP) increased (by 7% and 16%), respectively, and stroke volume index decreased by 10% (from 51.6 to 46.6 ml/beat/m2). Head-up tilt of 20 degrees further decreased CI to 2.98 l/min/m2 (-11%) and SVI to 40.3 ml/beat/m2 (-22%) while HR increased by a total of 14% and MAP by 19%. As laparoscopic techniques are applied to a broader population, the impact of small but significant decrements in cardiac function become increasingly important. This study demonstrates that the combination of CO2 pneumoperitoneum and the reverse Trendelenburg position does adversely effect cardiac output.

Cirugía laparoscópica: técnica operatoria sin pneumoperitoneo / Laparoscopic surgery: operative technique without pneumoperitoneum

Se presenta la experiencia en 123 pacientes, en quienes se efectuaron colecistostomía, herniorrafias o apendicectomía por vía laparoscópica, sin utilizar pneumoperitoneo. Esta nueva técnica es posible con el instrumento mecánico que hemos denominado Elevador Parietal de Speranza que produce la separación de la pared abdominal, obteniendo una adecuada cavidad de trabajo. Los hechos más relevantes observados fueron la ausencia de morbi-mortalidad producida por el sistema de insuflación con gas y la simpleza y facilidad de numerosas maniobras quirúrgicas. Se consiguen importantes ventajas al evitar la utilización de pneumoperitoneo: 1) se suprimen los trócares con válvulas; 2) no se utilizan los reductores de calibre; 3) aspiración intraabdominal contínua; 4) libre escape de humo fuera del abdomen; 5) colocación paralela de 2 instrumentos de menor calibre por trócar de mayor diámetro; 6) la ejecución de maniobras extracorpóreas están notoriamente simplificadas; 7) posibilita la realización de mini-laparotomías en forma simultánea; 8) menores costos de instrumental y equipamiento; 9) permite utilizar pinzas, tijeras, etc., de diseño no laparoscópico. Los pacientes fueron dados de alta dentro de las 24 horas, siendo el dolor pos-operatorio menor que con la técnica tradicional. No se produjo morbilidad ni mortalidad por la aplicación de la nueva técnica. El objetivo de este trabajo, es comunicar nuestra experiencia y hacer conocer el método con un video que documenta el procedimiento

Cirugía laparoscópica: técnica operatoria sin pneumoperitoneo / Laparoscopic surgery: operative technique without pneumoperitoneum

Se presenta la experiencia en 123 pacientes, en quienes se efectuaron colecistostomía, herniorrafias o apendicectomía por vía laparoscópica, sin utilizar pneumoperitoneo. Esta nueva técnica es posible con el instrumento mecánico que hemos denominado Elevador Parietal de Speranza que produce la separación de la pared abdominal, obteniendo una adecuada cavidad de trabajo. Los hechos más relevantes observados fueron la ausencia de morbi-mortalidad producida por el sistema de insuflación con gas y la simpleza y facilidad de numerosas maniobras quirúrgicas. Se consiguen importantes ventajas al evitar la utilización de pneumoperitoneo: 1) se suprimen los trócares con válvulas; 2) no se utilizan los reductores de calibre; 3) aspiración intraabdominal contínua; 4) libre escape de humo fuera del abdomen; 5) colocación paralela de 2 instrumentos de menor calibre por trócar de mayor diámetro; 6) la ejecución de maniobras extracorpóreas están notoriamente simplificadas; 7) posibilita la realización de mini-laparotomías en forma simultánea; 8) menores costos de instrumental y equipamiento; 9) permite utilizar pinzas, tijeras, etc., de diseño no laparoscópico. Los pacientes fueron dados de alta dentro de las 24 horas, siendo el dolor pos-operatorio menor que con la técnica tradicional. No se produjo morbilidad ni mortalidad por la aplicación de la nueva técnica. El objetivo de este trabajo, es comunicar nuestra experiencia y hacer conocer el método con un video que documenta el procedimiento (AU)