Intraoperative imaging in hallux valgus surgery

BackgroundThis prospective study investigates the use of intraoperative fluoroscopy in hallux valgus surgery. To our knowledge there have been no studies questioning the benefit and reliability of intraoperative fluoroscopy in hallux valgus surgery.MethodsWe performed a prospective investigation of 28 consecutive cases undergoing hallux valgus surgery. Fluoroscopic images were examined intraoperatively and any significant findings documented. A comparison was made between these images and weight bearing films 6 weeks postoperatively to examine their reliability. We excluded those patients that went on to have an Akin osteotomy.ResultsThere were no unforseen intraoperative events that were revealed by the use of fluoroscopy and no surgical modifications were made as a result of the intraoperative images. The intraoperative films were found to be a reliable representation of the postoperative weight bearing films but a small increase in the hallux valgus angle was noted at 6 weeks and this is thought to be due to stretching of the medial soft tissue repair.ConclusionsIntraoperative fluoroscopy is a reliable technique. This study was performed at a centre which performs approximately 100 hallux valgus operations per year and that should be taken into consideration when reviewing our findings. We conclude that there may be a role for fluoroscopy for surgeons in the early stages of the surgical learning curve and for those that infrequently perform hallux valgus surgery. We cannot, however, recommend that fluoroscopy be used routinely in hallux valgus surgery.     

Virtual 3D planning of osteotomies for craniosynostoses and complex craniofacial malformations

Introduction and objectivesComputer-assisted surgery has been more and more widely used in craniofacial surgery in recent years. It is useful in many situations: stereolithographic models, surgical simulations of osteotomies and bone repositioning, and cutting guides and customized implants. The present paper argues that computer-assisted surgery is particularly useful in complex cases such as rare malformations, or to address the sequelae of previous surgeries. The various advantages of the technique are emphasized from a surgical and from a teaching standpoint.Materials and methodsForty cases of various computer-assisted surgeries were analyzed, allowing a comprehensive review of outcomes in cases such as craniosynostosis, complex craniosynostosis, hypertelorism, craniosynostosis sequelae and cranio-facial and orbital trauma.ResultsResults were promising in all of the cases reviewed, except in a few cases for which computer-assisted surgery with cutting guides may not be necessary. In these specific cases, the pedagogical input is nevertheless interesting for residents and students.ConclusionComputer-assisted surgery is revolutionizing the surgical approach to complex craniofacial malformations, as well as easing management of less complex ones. It is likely that in the years to come this technique will supersede previous ones. However, using this technique implies being willing to rely on a non-human device. We need to consider computer-assisted surgery as a tool that can change surgical practices. The surgeon can rely on it, yet nothing will replace his/her eye and experience. It is the combination of both this experience and the appropriate use of computer-assisted surgery that, ultimately, leads to successful surgery.     

Image Fusion for Intraoperative Control of Axis in Long Bone Fracture Treatment

Abstract Background: The incidence of malalignment after long bone fracture fixation is reported to be between 0 and 37%. Modern fracture treatment strives towards closed reduction and minimally invasive fracture fixation, thus not exposing the fracture itself. Hence, the occurrence of malalignment might even be higher than previously reported and quite frequently even necessitate secondary operations. Minimally invasive techniques rely heavily on intraoperative fluoroscopy. However, fluoroscopic images have small cross-sections and consequently limit intraoperative visualization of the limb to individual segments only. Under these circumstances, correct alignment of fragments in long bone fractures is often compromised. Methods: We present a new software prototype using an absolute reference panel to concatenate two or more discontinuous fluoroscopic images into one single panoramic picture. The reference panel is placed on the operating table under the limb to be examined. Prior to digital picture fusion, the software applies non-linear distortion, picture scaling and de-rotation algorithms to the fluoroscopic images. Results: The presented software runs on a notebook and processes images generated by a commercially available mobile C-arm within seconds. The reliability of alignment in the panorama picture is found to be numerically adequate and the technique appropriate for clinical use. Conclusion: This method aims to improve the intraoperative visualization in minimally invasive osteosynthesis and therefore diminish malalignments in long bone fracture treatment.     

Intraoperative assessment of human spinal cord perfusion using near infrared spectroscopy with indocyanine green tracer technique

Background contextDespite the significant interest in the assessment of human cerebral perfusion, investigations into human spinal cord perfusion (SCP) are scarce. Current intraoperative monitoring of spinal cord relies on the assessment of neural conduction as a surrogate for SCP. However, there are various inherent limitations associated with the use of these techniques. Near infrared spectroscopy (NIRS) has been successfully used for monitoring and assessment of human cerebral perfusion and has shown promising results in intraoperative assessment of SCP in animal models.PurposeThe aim of this study was to investigate whether it is possible to monitor physiological changes in human SCP intraoperatively using NIRS with indocyanine green (ICG) tracer technique. We used this technique to calculate the human spinal cord carbon dioxide (CO₂) reactivity index. In addition, we investigated whether the lamina causes significant attenuation of NIRS signals.Study design/settingIntraoperative human experimental study.Patient sampleEighteen patients undergoing elective posterior cervical spine surgery.Outcome measuresCarbon dioxide reactivity of human SCP.MethodsNine patients underwent transdural assessment of SCP, with an additional nine patients undergoing translaminar measurements. Patients' SCP was continuously monitored using an NIRO-500 NIRS monitor via a set of purpose built optodes. Their arterial ICG concentration was simultaneously assessed using a pulse dye densitometer. Patients' end-tidal CO₂ was gradually increased by 7.5 mm Hg and then returned back to baseline. Three sets of measurements were taken: baseline, hypercapnic, and return to baseline.ResultsAfter hypercapnia, SCP increased by a mean of 57.2±23.3% in the transdural group and 46.6±36.3% in the translaminar group. Carbon dioxide reactivity index was 7.6±3.2%ΔSCP/mm Hg in the transdural group and 6.4±5.3 %ΔSCP/mm Hg in the translaminar group. There was no significant difference in the increase in SCP (p=.475) or the CO₂ reactivity index (p=.581) observed between the transdural and the translaminar groups.ConclusionsIntraoperative NIRS with ICG tracer technique can identify an increase in the SCP in response to hypercapnia. It is possible to use this technique for monitoring SCP over the dura and the lamina. This technique could potentially be used to provide insight in to the pathophysiology and autoregulation of commonly acquired spinal cord conditions. Further research assessing the use of NIRS for monitoring of SCP is required.     

大牵开器辅助下防旋股骨近端髓内钉内固定治疗股骨转子间骨折手术技术与疗效

目的:探讨在无牵床下大牵开器辅助维持复位使用防旋股骨近端髓内钉(proximal femoral nail antirotation,PFNA)治疗股骨粗隆间骨折的手术技术和疗效。方法:自2012年4月至2016年12月采用大牵开器辅助维持复位下PFNA内固定治疗55例股骨转子间骨折患者,男18例,女37例;年龄47～90岁,平均75.65岁;左侧31例,右侧24例。术前患髋疼痛、活动受限,下肢极度外旋畸形或伴有短缩,术前X线片均明确骨折。记录手术时间、术中出血量及术中透视时间,评价髋关节功能。结果:手术时间平均45.35 min,术中出血量平均117.64 ml,术中透视时间平均3.42 min,骨折均复位良好。55例患者术后获得随访,时间12～24个月,平均16.43个月。所有患者骨性愈合,无髋内翻畸形,内固定松动、断裂等并发症。根据Harris髋关节功能评分,优40例,良8例,可5例,差2例。结论:大牵开器辅助维持复位下使用PFNA能固定各型股骨转子间骨折,对手术体位要求简单,设备要求低,手术时间短,创伤小,固定可靠,患者术后恢复好,该手术方式可在无牵引床的基层医院开展。     

Abordaje guiado por ultrasonidos de los nervios intercostales en la línea media axilar para cirugía de mama no reconstructiva y de la axila

IntroductionSeveral nerve blocks have recently been used for pain treatment in breast surgery. The main objective of our study was to determine the efficacy and safety of ultrasound-assisted blocking of the anterior and lateral cutaneous branches of the intercostal nerves in the mid-axillary line for non-reconstructive breast and axilla surgery.Material and methodsA prospective observational study was conducted on 30 patients scheduled for non-reconstructive breast and axilla surgery. An intercostal branches block was performed in the mid-axillary line with 0,5% levobupivacaine (3 ml in each intercostal space). Clinical efficacy was assessed by standard intraoperative hemodynamic response to surgical stimulus and the need for opioids, and in the postoperative period, by assessing pain intensity as a verbal numerical scale and the need for rescue treatment. We also evaluated the quality of sleep the first night after surgery, any adverse events that occurred, and the satisfaction of patients and surgeons with the anesthetic technique.ResultsThe intercostal branches block in the mid-axillary line was effective in most cases, with only 2 patients requiring intraoperative opioids, and in one case analgesic rescue was necessary in the postoperative period. The duration of postoperative analgesia was 19 ± 4 h. There were no notable adverse events or complications. The satisfaction with the chosen technique was assessed as «very good» in all patients, and by 97% of the surgeons.ConclusionsIntercostal branches block in the mid-axillary line provides adequate intraoperative and postoperative analgesia for non-reconstructive breast and axilla surgery. It is a simple, reproducible technique in most patients of this study, with an easy to understand ultrasound anatomy, in which adequate analgesia could be provided through a single puncture, and may be an alternative to neuroaxial blocks.     

Exploring perioperative complications of anterior lumber interbody fusion in patients with a history of prior abdominal surgery: A retrospective cohort study

BACKGROUND CONTEXTAnterior lumbar interbody fusion (ALIF) exposes the anterior aspect of the spine through a retroperitoneal approach. Access to the anterior spine requires mobilization of intra-abdominal viscera/vasculature, which can become complicated as scarring and/or adhesions develop from prior abdominal surgical interventions, increasing risk of intraoperative complications. The literature suggests that “significant prior abdominal surgery” is a relative contraindication of ALIF surgery; however, there is no consensus within the literature as to what defines “major/significant” abdominal surgeries. Additionally, the association between the number of prior abdominal surgeries and perioperative complications in ALIF surgery has not been explored within the literature.PURPOSEThis study seeks to explore the association between perioperative complications of ALIF surgery and the type (major and/or minor) and number of prior abdominal surgeries.DESIGNA retrospective cohort study was performed to examine perioperative complications in ALIF patients with or without prior history of abdominal surgery.PATIENT SAMPLEAll consecutive patients undergoing ALIF with or without a history of prior abdominal surgery from 2008 to 2018 at a single tertiary center were evaluated. Patients under the age of 18, patients with spinal malignancy, or patients who had ALIF above L3 were excluded.OUTCOME MEASURESPerioperative complications included intraoperative complications during ALIF surgery and postoperative complications within 90 days of ALIF surgery. Intraoperative complications include vascular injury, ureter injury, retroperitoneal hematoma, etc. Postoperative complications include urinary tract infection, revision of abdominal scar, ileus, deep vein thrombosis, pulmonary embolism, etc. Other outcome measures include readmission within 90 days, length of ALIF surgery, and length of hospital stay.METHODSElectronic medical records of 660 patients who underwent ALIF between 2008 and 2018 were retrospectively reviewed. Patient demographics, Charleston Comorbidity Index (CCI), level of fusion, past abdominal surgical history, use of access surgeon during exposure, intraoperative, and postoperative complications were collected. Predictors of intraoperative and postoperative complications were analyzed using simple and multivariable logistic regression. Statistical analysis was performed using JMP 14.0 (SAS, Cary, NC, USA) software.RESULTSAfter controlling for age, length of ALIF, gender, multilevel ALIF, and the use of an access surgeon, there was no significant association between the type of prior abdominal surgery (major and/or minor) and intraoperative complications on multivariable logistic regression analysis (Minor: odds ratio [OR]=1.68; 95% confidence interval [CI]: 0.58–4.86 & Major: OR=1.99; 95% CI: 0.80–4.91). On multivariable logistic regression, the odds of developing an intraoperative complication increases by 52% for each additional prior abdominal surgery after adjusting for age, length of ALIF, gender, multilevel ALIF, and the use of an access surgeon (OR=1.52, 95% CI: 1.10–2.11). Iliac vein laceration was the most common intraoperative complication (n=27, 4%). Neither the type (major and/or minor) nor the number of prior abdominal surgeries were significant predictors of postoperative complications (Minor: OR=1.29; 95% CI: .72–2.31, Major: OR=1.24; 95% CI: 0.77–2.00, & Number: OR=1.03; 95% CI: .84–1.26).CONCLUSIONWith each additional prior abdominal surgery, accumulation of scarring and adhesions can likely obscure anatomical landmarks and increase the risk of developing an intraoperative complication. Therefore, the number of prior abdominal surgeries should be taken into consideration during planning and operative exposure of the anterior spine via a retroperitoneal approach.     

Clinical and functional outcomes of the saddle prosthesis

BackgroundThe implantation of a saddle prosthesis after resection of a pelvic tumor has been proposed as a simple method of reconstruction that provides good stability and reduces the surgical time, thus limits the onset of intraoperative complications. There are no studies in the literature of patients evaluated using gait analysis after being implanted with a saddle prosthesis. The present study is a retrospective case review aimed at illustrating long-term clinical and functional findings in tumor patients reconstructed with a saddle prosthesis.ResultsLong-term functional follow-up was achieved in only 6 patients, and ranged from 97 to 167 months. Function was found to be rather impaired, as a mean of only 57 % of normal activity was restored. Gait analysis demonstrated that the implant had poor biomechanics, as characterized by very limited hip motion.ConclusionsThough the saddle prosthesis was proposed as advance in tumor-related pelvic surgery, the present study indicates that it yields unsatisfactory clinical and functional results due to both clinical complications and the poor biomechanics of the device. The use of a saddle prosthesis in tumor surgery did not provide satisfactory results in long-term follow-up. It is no longer implanted at our institute, and is currently considered a “salvage technique.”

Level of evidence

Level IV.     

Minimal invasive surgery techniques for patients with adolescent idiopathic and early onset scoliosis

ObjectiveProvide an update on minimal invasive surgery (MIS) techniques for surgical management of pediatric spine.MethodsMinimal Invasive surgery for pediatric spine deformity has evolved significantly over the past decade. We include updated information about the surgical management of patients with adolescent idiopathic and Early Onset Scoliosis through MIS techniques. We take into consideration the implementation of this technique in Low-to-Middle Income Countries (LMICs).ResultsAlthough MIS began as a technique in adult and degenerative spine, recent publications on MIS in pediatric spine cases report benefits of decreased blood loss and infection incidence, and cosmetic advantages from fewer incision numbers. Adoption of MIS techniques in pediatric spine can be facilitated with pre- and intraoperative use of pertinent medical systems.ConclusionWith appropriate considerations and training, MIS is a safe procedure for pediatric spine correction surgery and can be applicable in LMICs.     

Does the use of intraoperative CT scan improve outcomes in Orthopaedic surgery? A systematic review and meta-analysis of 871 cases

BackgroundIntraoperative imaging is frequently made use of in Orthopaedic surgery. Historically, conventional 2-dimensional fluoroscopy has been extensively used for this purpose. However, 2D imaging falls short when it is required to visualise complex anatomical regions such as pelvis, spine, foot and ankle etc. Intraoperative 3D imaging was introduced to counter these limitations, and is increasingly being employed in various sub-specialities of Orthopaedic Surgery.ObjectivesThis review aims to outline the clinical and radiological outcomes of surgeries done under the guidance of intraoperative 3D imaging and compare them to those done under conventional 2D fluoroscopy.MethodsThree electronic databases (PubMed, Embase and Scopus) were searched for relevant studies that directly compared intraoperative 3D imaging with conventional fluoroscopy. Case series on intraoperative 3D imaging were also included for qualitative synthesis. The outcomes evaluated included accuracy of implant placement, mean surgical duration and rate of revision surgery due to faulty implants.ResultsA total of 31 studies from sub-specialities of spine surgery, pelvi-acetabular surgery, foot and ankle surgery and trauma surgery, having data on a total of 658 patients were analysed. The study groups which had access to intraoperative 3D imaging was found to have significantly increased accuracy of implant positioning (Odds Ratio 0.35 [0.20, 0.62], p = 0.0002) without statistically significant difference in mean surgical time (p = 0.57). Analysis of the studies that included clinical follow up showed that the use of intraoperative 3D imaging led to a significant decrease in the need for revision surgeries due to faulty implant placement.ConclusionThere is sufficient evidence that the application of intraoperative 3D imaging leads to precise implant positioning and improves the radiological outcome. Further research in the form of prospective studies with long term follow up is required to determine whether this superior radiological outcome translates to better clinical results in the long run.     

Double cystic duct preoperatively diagnosed and successfully treated with laparoscopic cholecystectomy: A case report

IntroductionA single gallbladder with a double cystic duct is a very rare finding. In addition, few cases with this rare condition are preoperatively diagnosed. However, the preoperative confirmation or suspicion of this rare condition could facilitate safe laparoscopic cholecystectomy, which is a minimally invasive therapeutic modality for gallbladder disease. We herein present a case of gallstone disease in a patient with a double cystic duct who was preoperatively diagnosed and successfully treated with laparoscopic cholecystectomy.Presentation of caseA 57-year-old woman was admitted to our hospital with epigastric pain. Gallstone disease in the gallbladder and common bile duct was diagnosed by ultrasonography and computed tomography. Magnetic resonance cholangiopancreatography (MRCP) and endoscopic retrograde cholangiography (ERC) revealed that the aberrant cystic duct arose from the cystic duct and communicated with the intrahepatic bile duct of the posterior segmental branch. Laparoscopic cholecystectomy was successfully performed in combination with intraoperative cholangiography.DiscussionIf an anomaly of the biliary duct system is not identified during surgery, it may turn out to be a bile leak. The preoperative diagnosis of a double cystic duct allows laparoscopic cholecystectomy to be performed safely in combination with intraoperative cholangiography.ConclusionsA single gallbladder with double cystic duct is a very rare anomaly. However, laparoscopic surgery can be facilitated by the use of preoperative and intraoperative images.     

Laparoscopic augmentation enterocystoplasty: initial experience

ObjectiveTo analyze the initial experience of our group in the realization of the augmentation enterocystoplasty by laparoscopyc approach.Methods and patientsWe describe the augmentation enterocystoplasty technique with ileal segment completely achieved by laparoscopyc approach. We present the cases of two patients suffering from hyperreflexic bladder refractory to medical treatment who underwent this surgery. In both cases the technique was realized without intraoperative complications although it was needed a surgical time of 6 and 4,5 hours respectively. The results after 12 and 5 months were satisfactory in both patients, obtaining a low pressure bladder with a good continence.ConclusionsLaparoscopyc augmentation enterocystoplasty is a complicated technique that requires a great experience, mainly in laparoscopyc suture. It reproduces completely the open surgery and it offers all the advantages inherent to the laparoscopyc surgery.     

Achieving precision surgery in laparoscopic liver resection with the aid of preoperative three-dimensional reconstruction: A case report

IntroductionThe use of three-dimensional image reconstruction in liver surgery is well-known and has got many applications: It was first developed for vein reconstruction in liver transplantation and for liver volumetry to prevent post hepatectomy liver failure (PHLF) after major resections. There are many other advantages described in the literature provided by three-dimensional reconstruction, however its diffusion is currently limited.Clinical caseWe present the case of a woman with a single colon cancer metastasis in segment 5 of the liver. Using CT scan images we created a three dimensional reconstruction of the patient’s liver and its inners structures. The rendering was used to hypothesize the plan of dissection and to predict the pedicles that needed to be dissected during the procedure.DiscussionWe try to demonstrate that, thanks to three dimensional image reconstruction, all the structures that need to be dissected could be effectively located prior to the the surgery with a high grade of approximation. Furthermore the 3D reconstruction could be used as a step by step guide during the whole surgical procedure, showing all the pedicles To be encountered and dissected at every stage.Conclusion3d reconstruction of the liver is a valid aid in the interpretation of preoperative imaging and intraoperative ultrasound, both for the surgeon and for the entire equipe, facilitating comprehension of patient’s liver anatomical features. It allows to predict the location and direction of the pedicles that need to be dissected and resected with high approximation, in order to achieve a more precise and tailored surgery.     

Transverse vaginal septum managed by simple flap surgery technique: A case report

BackgroundTransverse Vaginal Septum (TVS) is a rare congenital abnormality, classified as the Mullerian duct anomaly development.^1,2 TVS incidence range from 1:2.000 to 1:72.000. Management of TVS may only requirement local excision with a simple end to end anastomosis of the vagina, and use of skin grafts, but this technique has been reported has common complications of secondary tissue contracture, which often lead to stenosis of the vagina.³ In this case we managed TVS with simple flap technique to avoid such postoperative complications and maintain caliber of vagina.CaseA 11 years old girl complained cyclical abdominal pain since a year ago without history of menstrual blood. Patient already had vaginal surgery for removing menstrual blood, but after vaginal surgery the menstrual blood cannot be removed, then referred to our hospital. Ultrasound examination revealed hematometra and hemocolpos. The septum location was 3,38 cm proximal distance from vaginal introitus with the thickness of 8.1 mm. We performed simple excision of the septum with formerly performed distal vaginal septum mucosa preparation creating lateral flaps, then approximating the flaps to the edge of the proximal vaginal mucosa with interrupted suture continued with hymenorraphy. The patient has no complaint 6 months after surgery with vaginal length 8 cm, and had regular menstrual cycle.ConclusionA simple flap surgery technique can be done in transverse vaginal septum, with no complication such as tissue contracture, vaginal stenosis, or insightly scarring. This is a simple technique and can be done with hymenorraphy to restore normal anatomy of hymen.     

A paradigm shift in surgical planning and simulation using 3Dgraphy: Experience of first 50 surgeries done using 3D-printed biomodels

IntroductionPreoperative planning is an important aspect of any orthopedic surgery. Traditionally, surgeons mentally rehearse the operation and anticipate problems based on data available from “radiography” like MRI and CT. 3D printed bio-models and tools, or “3Dgraphy” can simplify this mental exercise and provide a realistic and user-friendly portrayal of this radiographic data.MethodsFive surgeons participated in this multicenter study. 3D printed biomodels were obtained for 50 surgical cases that included periarticular trauma (24), pelvic trauma (11), complex primary (7), and revision arthroplasty (8). CT scan data was used to generate computer models which were then 3D printed in real size. These models were used to understand pathoanatomy and conduct simulated surgery as a part of preoperative planning. The models were sterilized and were used for intraoperative referencing. Following each case, the operating surgeon was asked to fill out a structured questionnaire to report on the perceived benefits of these tools.ResultsAll surgeons reported that the biomodels provided additional information to conventional imaging that enhanced their knowledge of the complex pathoanatomy. It was useful in preoperative planning, rehearsing the operation, surgical simulation, intraoperative referencing, surgical navigation, preoperative implant selection, and inventory management. This probably reduced surgical time and improved accuracy of the surgery. All surgeons reported that they would not only use it themselves but also recommend it to other surgeons.Conclusion3Dgraphy was found to be a valuable tool in orthopedic surgeries that involve complex pathoanatomy like pelvic trauma, revision arthroplasty, and periarticular fracture. As the technology evolves and improves, they are likely to become a standard component of many orthopedic procedures.     

Pectoralis major interposition flap: A new technique for treatment of severe peri-ductal mastitis

BackgroundPeri-ductal mastitis is an uncommon benign disorder of the major lactiferous ductal system of the female breast. It can be a very difficult problem to treat and may cause significant patient morbidity. We describe a new technique, involving use of the pectoralis major muscle flap, for treating recurrent sub-areolar abscess refractory to standard surgical treatment.MethodThree patients who underwent this new technique for severe refractory peri-ductal mastitis at Calvary Hospital, Canberra are presented.ResultsThese patients who had recurrent peri-ductal mastitis with abscess and fistula formation on a monthly basis despite numerous courses of antibiotics and surgical procedures experienced no further recurrences following pectoralis major interposition flap surgery at 42, 32 and 22 months follow-up respectively.ConclusionThis new technique may provide an opportunity to control these otherwise difficult to treat cases of severe recurrent peri-ductal mastitis where standard surgical methods have failed.     

Chronic arterial hypertension and nocturnal non-dipping predict postinduction and intraoperative hypotension: A secondary analysis of a prospective study

Study objectivePostinduction and intraoperative hypotension are associated with organ injury in non-cardiac surgery patients. Automated ambulatory blood pressure monitoring can identify chronic arterial hypertension and nocturnal blood pressure non-dipping. We tested the hypotheses that: a) chronic arterial hypertension and nocturnal non-dipping are independent risk factors for postinduction and intraoperative hypotension; and b) adding information on chronic arterial hypertension and nocturnal non-dipping improves hypotension prediction models based on readily available preoperative clinical information.DesignPrediction model development based on a secondary analysis of a prospective observational study.SettingGerman university medical center.Patients366 non-cardiac surgery patients who had preoperative automated ambulatory blood pressure monitoring.MeasurementsMultivariable analyses to identify risk factors for postinduction and intraoperative hypotension. Area under receiver operating characteristics curves (AUROC) and likelihood-ratio tests to test whether adding information on chronic arterial hypertension and nocturnal non-dipping improves hypotension prediction models based on readily available preoperative clinical information.Main resultsRisk factors for postinduction hypotension were age in years (odds ratio: 1.06 (95% confidence interval: 1.03 to 1.10), P = 0.001), American Society of Anesthesiologists physical status class (1.85 (1.02 to 3.35), P = 0.043), preoperative use of angiotensin-converting enzyme inhibitors or angiotensin II receptor blockers (15.19 (1.76 to 131.46), P = 0.013), chronic arterial hypertension (2.54 (1.49 to 4.34), P = 0.001), and nocturnal non-dipping (3.61 (2.09 to 6.23), P < 0.001). The model's AUROC was 0.76 (95% confidence interval: 0.71 to 0.81) with and 0.67 (0.62 to 0.73) without information on chronic arterial hypertension and nocturnal non-dipping (P < 0.001). Risk factors for intraoperative hypotension were male sex (1.73 (1.07 to 2.80), P = 0.025), chronic arterial hypertension (4.35 (2.33 to 8.14), P < 0.001), and nocturnal non-dipping (3.56 (2.07 to 6.11), P < 0.001). The model's AUROC was 0.76 (0.70 to 0.81) with and 0.63 (0.57 to 0.69) without information on chronic arterial hypertension and nocturnal non-dipping (P < 0.001).ConclusionsChronic arterial hypertension and nocturnal non-dipping are independent risk factors for postinduction and intraoperative hypotension in non-cardiac surgery patients. Adding information on chronic arterial hypertension and nocturnal non-dipping moderately improved hypotension prediction models based on preoperative clinical information.     

Cirugía laparoscópica del reflujo vesicoureteral: experiencia en 42 pacientes con la técnica extravesical de Lich-Gregoir

IntroductionVesico-ureteral reflux (VUR) is a common congenital anomaly of the urinary tract in the pediatric population, existing controversy regarding its management. Patients selected for treatment options are offered, from endoscopic injection of substances sub-ureteral to ureteral reimplantation surgery.ObjectiveTo evaluate the use of the laparoscopic surgical technique for the treatment of vesico-ureteral reflux, with an analysis of the procedure, results and complications.Material and methodsWe evaluated a series of 50 ureteral units in 42 patients, who undergoing laparoscopic transperitoneal ureteral reimplant, using the classic technique of Lich-Gregoir detrusorrafia.ResultsThe mean operative time was 74 minutes. There were no intraoperative nor immediate postoperative. At longer follow-up VUR was cured in all cases.ConclusionsLaparoscopic surgery is an effective alternative in the surgical treatment of vesico-ureteral reflux, with results comparable to open surgery techniques and over sub-ureteral injection techniques.