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Objective To evaluate the impact of warmed and humidified CO2 on the gynecological laparoscopic operation. Methods We searched keywords related to gynecological laparoscopic and CO2 pneumoperitoneum temperature and humidity on Pubmed and Wanfang database, then analyze the postoperative pain, analgesic consumption, core temperature, operation time, length of hospital stay. Results 17 publications included into the meta analysis after screening. Compared with the standard laparoscopy, warmed and humidified CO2 can reduce postoperative pain and prevent intraoperative hypothermia. No significant difference in postoperative analgesic consumption, postoperative core temperature, duration of recovery and hospital stay, endoscope lens fog and operation time. Conclusions Only few beneficial effects on postoperative pain and core temperature have been identified in this meta-analysis, though more studies are probably needed to study the real impact of warmed and humidified CO2 for laparoscopic procedures.
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Objective To determine the ED50 of dexmedetomidine for suppressing cardiovascular responses to placement of laryngeal mask airway (LMA) in patients undergoing gynecological laparoscopic surgery with induction of propofol. Methods ASA I or II Patients aged 18 to 55 undergoing elective gynecological laparoscopic surgery were enrolled. After an bolus dose of dexmedetomidine over 10 min , anaesthesia was induced with target-controled propofol, and then bolus of vecuronium of 0.1 mg/kg was injected when the BIS was between 45 and 55. LM palcement was performed 3 minutes after vecuronium injection. The modified Dixon ’ s up-and-down method was used to determine the bolus dose of dexmedetomidine , starting from 1.0 μg/kg (step size:0.1 μg/kg). Cardiovascular response was defined as an increase in SBP and/or HR by 15% of baseline within 2 min after placement of LMA. The test ended after at least 7 crossovers ( successive ‘response’ or ‘non-response’) were obtained. Probit analysis was used to calculate ED50, ED95 and 95% confidence interval (CI). Results The ED50 and ED95 (95% confidence interval) of dexmedetomidine for suppressing cardiovascular responses to placement of LMA was 0.65 μg/kg (0.44-0.80) μg/kg and 0.94 μg/kg (0.79-2.47) μg/kg. Conclusion Under induction of target-controled propofol , the ED50 of dexmedetomidine is 0.65 μg/kg for suppressing cardiovascular responses to placement of LMA in female patients.
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El avance de la tecnología y de las nuevas técnicas quirúrgicas en las especialidades médicas, ha convertido a la cirugía de mínima invasión ginecológica en una alternativa para el beneficio de los pacientes, obteniendo en la mayoría de los casos mejores resultados que la cirugía convencional. El objetivo de este documento es describir cuales son los mejores recursos y técnicas para el desarrollo y mantenimiento de destrezas en cirugía laparoscópica ginecológica, así como evidenciar los factores que favorecen o afectan la curva de aprendizaje y la calidad del desempeño. Así mismo, la metodología que supervisa el aprendizaje también puede examinar la competencia y la calidad del desempeño continuo en los procedimientos quirúrgicos. No existe una diferencia significativa entre las técnicas de entrenamiento en cirugía laparoscópica de mínima invasión, pero si es evidente que el entrenamiento previo mejora la habilidad individual y se obtienen resultados precisos y reproducibles. Es difícil mantener la consistencia, por lo que la ejecución deberá ser supervisada por métodos cuantitativos a fin de disminuir las complicaciones. Es evidente que se deben actualizar los programas académicos en la especialidad de ginecología, donde se incorpore un verdadero módulo de cirugía laparoscópica para que los médicos en formación adquieran destrezas con los procedimientos de baja complejidad, y al desarrollarse en los niveles de dificultad quirúrgica, se pueda supervisar la calidad del desempeño con métodos estadísticos adecuados.
The advancement of new surgical techniques in medical specialties has become minimally invasive gynecologic surgery into a modern surgical technique. There are a number of advantages to the patient with laparoscopic surgery versus an open procedure, obtaining in most cases mayor benefits than traditional surgery techniques. The purpose of this study was to describe which are the best aspects and techniques for developing and maintaining skills in gynecologic laparoscopic surgery and identify the factors affecting learning curves. A lot of factors are involved: like institutional policies and the characteristics of the surgeon such as attitude and capacity for acquiring new skills. Prior laparoscopic training has been shown to facilitate the process of learning, reduces complication rates and operative time. The type of training the surgeon has received is not significantly related to this learning curve. Maintaining consistency is challenging: however, assessing laparoscopic learning can also examine surgical competence. Consequently the implementation should be monitored by quantitative methods in order to provide both numerical and graphical representation of the learning process. The learning curves combined with the advantages of feedback using the rating scales open the possibility to design high-quality training curricula in advanced laparoscopy. It is clear that academic programs must be updated: this leads to an increasing demand for evidence and proficiency-based education, training and assessment of gynecologic laparoscopic skills. We need a feasible, structured and objective statistical system for assessment of both technical and procedural skills.
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Learning , Clinical Competence , Gynecology , User-Computer Interface , Laparoscopy , Models, Anatomic , Aptitude , Teaching , Video-Audio Media , Models, AnimalABSTRACT
BACKGROUND: The authors evaluated the hemodynamic effects of body position measured by esophageal Doppler monitor (EDM) during laparoscopic cholecystectomy or gynecologic laparoscopic surgery. METHODS: Fifty patients scheduled to undergo laparoscopic cholecystectomy (Group C) or gynecologic laparoscopic surgery (Group G), were divided into two groups. Pneumoperitoneum was instituted by CO2 gas and the intraperitoneal pressure was kept under 12 mmHg. Hemodynamic parameters at critical points were measured by the use of EDM: before skin incision (T1), 5, 10 and 15 min after changing position (T2, T3 and T4), and 5 min after CO2 exsufflation (T5). RESULTS: MAP (mean arterial pressure) was significantly higher in Group G when compared with Group C 10 min after changing position (T3) (P< 0.05). CO (cardiac output) was significantly decreased in Group G when compared with Group C 10 min after changing position (T3) (P< 0.05). And there were not significant differences in HR (heart rate) between two groups. PV (peak velocity) was significantly decreased in Group G when compared with Group C 10 min after changing position (T3) (P< 0.05). And there were not significant differences in FTc (corrected flow time) between two groups. But FTc in Group C was restored after CO2 exsufflation, FTc in Group G was not restored after CO2 exsufflation. CONCLUSIONS: Changing position in the gynecologic laparoscopic surgery group can elevate MAP and decrease CO. Therefore, careful caution is required in patients with cardiovascular disease who are undergoing gynecologic laparoscopic surgery.
Subject(s)
Humans , Cardiovascular Diseases , Cholecystectomy, Laparoscopic , Hemodynamics , Laparoscopy , Organothiophosphorus Compounds , Pneumoperitoneum , SkinABSTRACT
BACKGROUND: Postoperative nausea and vomiting (PONV) is extremely distressing and uncomfortable, and is noted frequently in patients who have undergone gynecologic laparoscopic surgery. In this study, we compared the efficacy of a combination of ramosetron plus dexamethasone and ramosetron alone in reducing of PONV after gynecologic laparoscopic surgery. METHODS: Sixty patients who received gynecologic laparoscopic surgery were randomly divided into two groups: the R group (ramosetron 0.3 mg) and RD group (ramosetron 0.3 mg plus dexamethasone 5 mg). Dexamethasone, 5 mg, or saline, 1 ml, was administered randomly before the induction of anesthesia in each group. The two groups received intravenous ramosetron, 0.3 mg, at the end of surgery. General anesthesia was induced using thiopental and rocuronium, and maintained with sevoflurane in nitrous oxide. The incidence and severity of nausea, frequency of vomiting and rescue medication, VAS score, and adverse events were evaluated for 48 hours after the operation. RESULTS: In the first 12 hours after operation, the incidence of PONV in the RD group (33%) was significantly lower than the R group (67%; P < 0.05). However, there were no significant differences between two groups in PONV incidence 12-48 h postoperatively. Adverse events and VAS scores were similar in the two groups. CONCLUSIONS: The combination of ramosetron plus dexamethasone is superior to ramosetron alone for prevention of PONV during the first 12 hours after gynecologic laparoscopic surgery.
Subject(s)
Humans , Androstanols , Anesthesia , Anesthesia, General , Benzimidazoles , Dexamethasone , Incidence , Laparoscopy , Methyl Ethers , Nausea , Nitrous Oxide , Postoperative Nausea and Vomiting , Thiopental , VomitingABSTRACT
BACKGROUND: The authors performed this study to investigate the hemodynamic effect of nicardipine using an esophageal Doppler monitor (EDM) during gynecologic laparoscopic surgery. METHODS: Forty patients scheduled to undergo gynecologic laparoscopic surgery, were divided into two groups; the control group (Group C) and the nicardipine group (Group N). Pneumoperitoneum was initiated using CO2 gas and the intraperitoneal pressure was kept under 12 mmHg. Hemodynamic parameters at critical points were measured using EDM, i.e., before skin incision (T1), 5, 10 and 15 min after the initiation of pneumoperitoneum (T2, T3 and T4), and 5 min after deflation (T5). RESULTS: Mean arterial pressure (MAP) was significantly lower in Group N patients than in Group C patients at 5 and 10 min after the initiation of pneumoperitoneum (T2 and T3) (P < 0.05). No significant heart rate (HR) differences were observed between the two study groups. Cardiac output (CO), peak velocity (PV) and corrected flow time (FTC) were significantly higher in Group N at 10 min after the initiation of pneumoperitoneum (T3) (all P < 0.05). CONCLUSIONS: The nicardipine continuous infusion at 0.5?2.0microg/ kg/min is effective at attenuating hemodynamic changes after pneumoperitoneum during gynecologic laparoscopic surgery.
Subject(s)
Humans , Arterial Pressure , Cardiac Output , Heart Rate , Hemodynamics , Laparoscopy , Nicardipine , Organothiophosphorus Compounds , Pneumoperitoneum , SkinABSTRACT
BACKGROUND: Because laparoscopic surgery has many advantages compared with conventional methods, it has recently been applied to not only intraabdominal or intrathoracic surgery but also thyroidectomy. It is possible that arterial blood gases and hemodynamic variables can be changed by patient position and insufflation of pressurized CO2 into extraperitoneal or intraperitoneal space, so we examined the changes in arterial blood gases, end tidal CO2 (P(ET)CO2) and hemodynamic variables during an endoscopic thyroidectomy with extraperitoneal CO2 insufflation, laparoscopic cholecystectomy and gynecologic laparoscopic surgery with intraperitoneal CO2 insufflation under N2O, enflurane inhalational general anesthesia. METHODS: Forty ASA class I or II patients were included in this study, endoscopic thyroidectomy group (n = 10), laparoscopic cholecystectomy group (n = 18), gynecologic laparoscopic surgery group (n = 12). All patients were underwent controlled mechanical ventilation (tidal volume: 10 ml/kg, respiratory rate: 12/min) and the ventilator mode was fixed in this volume and rate until the end of the operation. The position of patients during the endoscopic thyroidectomy and laparoscopic cholecystectomy were under 5 degree reverse Trendelenburg position, whereas the gynecologic laparoscopic surgery was under a 10 degree head-down lithotomy position. Variables were measured before CO2 insufflation (10 minute after induction), 10, 20 and 30 minutes after CO2 insufflation and 40 minutes after CO2 deflation. RESULTS: PaCO2 and P(ET)CO2 were significantly increased during CO2 insufflation compared with preinsufflation values in all groups, but the magnitude of increases of PaCO2 and PETCO2 was not significantly different among the three groups. The mean magnitude of increases of PaCO2 at 10 minutes after CO2 insufflation were as follows: gynecologic laparoscopic surgery (6.21 +/- 2.0 mmHg), endoscopic thyroidectomy (5.07 +/ 2.3 mmHg), and laparoscopic cholecystectomy (5.01 +/- 2.2 mmHg). CONCLUSIONS: We concluded that PaCO2 and P(ET)CO2 were significantly increased during CO2 insufflation compared with the preinsufflation values in all groups, but the magnitude of increases of PaCO2 and P(ET)CO2 was not significantly influenced by CO2 insufflation site and patient position.