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Τρίτη 27 Οκτωβρίου 2020

Respiratory Muscle Fatigue Alters Cycling Performance and Locomotor Muscle Fatigue

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imagePurpose This study aimed to determine if preexisting respiratory muscle fatigue (RMF) alters motoneuronal output, locomotor muscle fatigue, and cycling performance. Methods Eight trained male cyclists performed 5-km cycling time trials after a resistive breathing task that induced RMF and under control conditions (CON). Motoneuronal output was estimated using vastus lateralis surface electromyography, and locomotor muscle fatigue was quantified as the change in potentiated quadriceps twitch force from preexercise to postexercise. Results Time to complete the time trial was 1.9% ± 0.9% longer in RMF compared with CON (P
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PLCD1: A Potential Therapeutic Target in the Treatment of Esophageal Squamous Cell Carcinoma?

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Apical pelvic organ prolapse repair via vaginal‐assisted natural orifice transluminal endoscopic surgery: Initial experience from a tertiary care hospital

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Abstract

Introduction

Natural orifice transluminal endoscopic surgery has been used for gynecologic operations in recent years. The aim of the study is to describe our initial experience using vaginal‐assisted natural orifice transluminal endoscopic surgery (vNOTES) for apical pelvic organ prolapse repair.

Methods

After patients underwent vaginal hysterectomy, vNOTES sacrocolpopexy (n = 4) or vNOTES high uterosacral ligament suspension (n = 7) were performed to treat symptomatic apical pelvic organ prolapse. Sociodemographic and clinical characteristics, Pelvic Organ Prolapse Quantification results, and recorded surgical data (eg, duration of surgery, intraoperative complications, additional prolapse and incontinence surgeries) were obtained from patient files and the hospital's database. Information from postoperative follow‐up visits, including complications and anatomical results, were also recorded.

Results

The mean age of the patients was 60.7 ± 9.1 years. The mean total operative time was 121.3 ± 22.7 minutes. The mean operative time for vaginal hysterectomy, vNOTES sacrocolpopexy, and vNOTES uterosacral ligament suspension was 46 ± 11.9, 65 ± 38, 25 ± 8.2 minutes, respectively. There were no intraoperative and postoperative complications observed. The mean postoperative 24‐hour visual analog scale score was 3.5 ± 1.9 for vNOTES sacrocolpopexy patients and 3.2 ± 0.9 for vNOTES uterosacral ligament suspension patients. Only one patient in the vNOTES sacrocolpopexy group had a recurrence; she experienced stage 2 anterior compartment prolapse 8 months after surgery.

Conclusion

As a treatment for apical pelvic organ prolapse, vNOTES is a feasible approach in both sacrocolpopexy and uterosacral ligament suspension.

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Single‐incision laparoscopic full‐thickness anterior abdominal wall repair of a Morgagni hernia using a suture‐assisting needle in a child: A case report

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Abstract

Single‐incision laparoscopic repair of a congenital Morgagni diaphragmatic hernia using a suture‐assisting needle was performed in a 1‐year‐old boy. Three ports were inserted through a single umbilical incision to repair the 2.5 × 2.3‐cm defect. The full‐thickness muscle layer of the anterior abdominal wall and the posterior rim of the defect were penetrated with the suture‐assisting needle holding a thread, which was then released. The needle tip was pulled back over the muscle layer, shifted laterally, and again passed through the muscle layer and the posterior rim. The thread was then captured by the needle and pulled out through the anterior abdominal wall. Five mattress sutures were placed in this way and tied subcutaneously. The postoperative course was uneventful, and the cosmetic outcome was favorable. A suture‐assisting needle is useful for completing full‐thickness anterior abdominal wall repair, which is important for preventing the recurrence of a congenital Morgagni diaphragmatic hernia.

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Does the time from symptom onset to surgery affect the outcomes of patients with acute appendicitis? A prospective cohort study of 255 patients

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Abstract

Introduction

The objective of this study was to evaluate the impact of operative timing on outcomes of acute appendicitis.

Methods

This study examined adult patients who had presented to the hospital with acute appendicitis and had undergone appendectomy from December 2017 to February 2019. Time delay and outcomes of perforated and non‐perforated appendicitis were compared. Patients were classified into five groups based on the period from symptom onset to operation: group 1, <24 hours; group 2, ≥24 and <48 hours; group 3, ≥48 and <72 hours; group 4, ≥72 and <96 hours; and group 5, ≥96 hours. The five groups were compared, with risk of perforation assessed in particular.

Results

A total of 255 patients were included in the analysis. Symptom duration, operative time, and length of postoperative hospital stay (P < .001) were significantly longer in the perforated group (n = 49) than in the non‐perforated group (n = 206). The perforated group also had a higher conversion rate to open procedures (P = .002) and a higher rate of wound infection (P = .034). Group 1 had 53 patients, group 2 had 95 patients, group 3 had 57 patients, group 4 had 32 patients, and group 5 had 18 patients. The incidence of appendiceal perforation and median operative time progressively increased along with symptom duration in the five groups. In multivariate analyses, independent risk factors for appendiceal perforation were male gender (odds ratio = 2.33, 95% confidence interval [CI]: 1.07‐5.08) and symptom duration ≥48 hours (relative to ≥24 and <48 hours) (odds ratio = 4.64, 95%CI: 1.76‐12.27). Patients with symptom duration ≥72 ho urs had a significantly longer operative time than those with symptom duration ≥48 and <72 hours (β = 21.38, 95%CI: 5.66‐37.11, P = .008).

Conclusion

The risk of perforation increased significantly 48 hours after the onset of appendicitis. Symptoms duration ≥72 hours was associated with a longer operative time.

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Laparoscopic surgery in patients with cystic fibrosis: A systematic review

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Abstract

Introduction

Laparoscopic surgery may be advantageous for cystic fibrosis (CF) patients because it leads to fewer complications than open surgery. However, it could still lead to pulmonary and cardiovascular complications in CF patients. We aimed to systematically review the use of laparoscopic surgery in CF patients.

Methods

A systematic review was performed in compliance with PRISMA guidelines. A literature search was performed using PubMed/MEDLINE, ScienceDirect, EMBASE, and Google Scholar, with "cystic fibrosis and laparoscopic surgery" and "cystic fibrosis and minimally invasive surgery" used as the search terms. The Grading of Recommendations Assessment, Development, and Evaluation (GRADE) criteria were applied. The protocol was registered with the PROSPERO register.

Results

Six studies met the predetermined inclusion criteria; accordingly, two studies provided high‐quality evidence and four provided moderate‐quality evidence. The interrater correlation was convincing (r s = .95, P = .02, two‐tailed). Therefore, three quantitative studies and three qualitative studies were assessed and evidence‐graded in accordance with the GRADE protocol.

Conclusion

The benefits of laparoscopic surgical interventions for patients with CF were supported with good evidential value and recognized as a safe and suitable surgical option.

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Intestinal blood flow evaluation using the indocyanine green fluorescence imaging method

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Abstract

In surgery for incarcerated hernia, intestinal blood flow is an important factor in intraoperative decision‐making given that irreversible ischemia can result in intestinal necrosis. Here, we report a case of incarcerated obturator hernia in which the bowel was successfully preserved by evaluating intestinal blood flow with the indocyanine green fluorescence imaging method. A woman in her 80s was diagnosed with incarcerated right obturator hernia, and a laparoscopic operation was performed. The small bowel tissue that had been incarcerated exhibited dark red discoloration. Fluorescence examination of the bowel wall indicated that the ischemic changes were reversible, and accordingly, the bowel was not resected. The postoperative course was uneventful. The indocyanine green fluorescence imaging method is a useful new source of evidence that will improve intraoperative decision‐making regarding bowel ischemia.

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Primary anterior perineal hernia: A case report and review of the literature

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Abstract

Perineal hernia is a type of pelvic floor hernia and an extremely rare pathologic state. Perineal hernias can be classified into anterior and posterior types according to their positional relationship to the superficial transverse perineal muscle. A 49‐year‐old woman presented with bulging of the right labium major while standing. Standing external ultrasonography revealed a mass in the bulge, which could not be identified by transvaginal ultrasonography, CT, or MRI. Although hernia content could not be identified preoperatively, the patient was given a diagnosis of primary perineal hernia and underwent laparoscopic repair. Symptoms resolved postoperatively, and no sign of relapse has been noted for 8 months postoperatively. Here, we report the case details and review previous case reports.

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Comparison of postoperative plasma D‐dimer levels between patients undergoing laparoscopic resection and conventional open resection for colorectal cancer

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Abstract

Introduction

D‐dimer is widely used in clinical pretests for venous thromboembolism exclusion, and its elevation suggests the presence of thrombus. The extent of hypercoagulability after colorectal surgery has not been systematically compared between patients who have undergone laparoscopic surgery and open surgery. The present study measured D‐dimer levels sequentially in patients undergoing colorectal surgery and compared the extent of hypercoagulability between laparoscopic surgery and open surgery.

Methods

A prospective cohort study involving 169 patients who underwent resection of colorectal cancer at Saitama Medical Center, Dokkyo Medical University, was conducted between January 2013 and September 2014. To measure D‐dimer level, peripheral blood was obtained on postoperative day (POD) 1, POD4, and POD7. Enoxaparin sodium was administered twice daily as the routine prophylactic anticoagulant therapy on POD2 to 7.

Results

D‐dimer levels on POD1, POD4, and POD7 were significantly higher after open surgery than after laparoscopic surgery. Older age, pathologically advanced stage cancer, greater intraoperative blood loss and higher preoperative D‐dimer levels were significantly associated with higher D‐dimer levels on POD1, POD4, and POD7. Patients who completed the course of postoperative enoxaparin injections had significantly lower D‐dimer levels on POD7 than those who did not receive postoperative enoxaparin injections. Multiple regression analyses of postoperative D‐dimer level showed that laparoscopic surgery was a significant and independent factor affecting D‐dimer level on POD4 and POD7.

Conclusion

This study showed that postoperative D‐dimer levels were lower after laparoscopic surgery than after open surgery. The limited invasiveness of laparoscopic surgery may be beneficial to reduce the risk of postoperative deep vein thrombosis.

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Is laparoscopic and endoscopic cooperative surgery (LECS) for gastric subepithelial tumor at the esophagogastric junction safe?

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Abstract

Introduction

With technique improvements, indications for laparoscopic and endoscopic cooperative surgery (LECS) for gastric subepithelial tumor (SET) are gradually expanding for tumors technically difficult to resect. However, surgical outcomes of LECS, including for esophagogastric junction (EGJ) tumors requiring advanced skills, remain unknown.

Methods

We reviewed patients in whom LECS had initially been attempted for gastric SET at the Cancer Institute Hospital in Tokyo from June 2006 to May 2018. Indications for LECS at the EGJ have gradually expanded during the study period to include tumors with esophageal invasion up to 2 cm, or less than half the EJG circumference, preoperatively. Surgical outcomes and risk factors for conversion to other procedures were investigated.

Results

Twenty (9.3%) of the 214 total patients had EGJ tumors. Four patients (20%) with EGJ tumors developed postoperative complications (Clavien‐Dindo grade ≥ II). Among 12 patients in whom LECS could be completed for EGJ tumors, only one non‐serious complication occurred. Eight patients required conversion to another operation for EGJ tumors (two laparotomy, six proximal gastrectomy). Among conversion cases with EGJ tumors, anastomotic leakage occurred in both patients undergoing laparotomy after LECS, necessitating additional defect closure. There was only one non‐serious complication in six proximal gastrectomy patients. On multivariate analysis, EGJ tumor was an independent risk factor for conversion to another operation.

Conclusion

LECS at the EGJ may be a risk factor for conversion operation, and when performing LECS at the EGJ is difficult, conversion to proximal gastrectomy, which can be performed safely, should be considered.

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Causes of peritoneal injury during laparoscopic totally extraperitoneal inguinal hernia repair and methods of repair

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Abstract

Introduction

Peritoneal injury during laparoscopic totally extraperitoneal (TEP) inguinal hernia repair is an intraoperative complication that affects accomplishment. We retrospectively examined the causes of peritoneal injury and methods of TEP repair.

Methods

This study examined 58 patients with inguinal hernia (43 unilateral, 15 bilateral) who had undergone TEP repair; all procedures were performed by the same surgeon. The incidence of peritoneal injury, clinical characteristics that could have influenced peritoneal injury, and management of the injury were analyzed.

Results

Peritoneal injury was noted in 16 inguinal hernias (21.9%, 16 /73). Injury occurred more frequently in right‐sided hernias than in left‐sided hernias (31.6% vs 11.4%, P = .049). No other factors were related to injury. Peritoneal injury occurred due to anatomical misrecognition in five hernias (31.3%, 5/16) and unintentional dissection in six hernias (37.5%, 6/16). All injuries due to unintentional dissection occurred in right‐sided hernias. The procedures used for peritoneal injury repair were endoscopic suturing for 4 hernias, pre‐tied loop ligation for 1 hernia, and ligation clips in 11 hernias. Additional techniques were required in three hernias repaired by endoscopic suturing (75% 3/4). After introduction of the ligation clips, endoscopic suturing was discontinued, and no additional techniques were needed.

Conclusion

Peritoneal injury more frequently occurred in right‐sided inguinal hernia than in left‐sided inguinal hernia during TEP repair. The common reasons for peritoneal injury were anatomical misrecognition and unintentional dissection. Repair using ligation clips is the best option for peritoneal injuries that occur during TEP repair.

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Finite element method for nerve root decompression in minimally invasive endoscopic spinal surgery

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Abstract

Introduction

Diagnosis is the key to improving spinal surgery outcomes. Improvements in the diagnosis of radiculopathy have created new indications for full‐endoscopic spine surgery. We assessed the finite element method (FEM) to visualize and digitize lesions not detected by conventional diagnostic imaging.

Methods

We used FEM in two patients: a lumbar patient and a cervical patient. The lumbar patient was a 67‐year‐old woman with a history of rheumatoid arthritis; she also had osteoporosis and pulmonary fibrosis. She had left L3 radiculopathy due to an L3 vertebral fracture. The cervical patient was a 61‐year‐old woman with left C6 radiculopathy due to C5‐C6 disc herniation. We performed full endoscopic foraminotomy per the patients's request. Based on preoperative and postoperative CT Digital Imaging and Communications in Medicine data of 0.5‐mm slices, 3‐D imaging data were reproduced, and kinetic simulation of FEM was performed.

Results

Postoperatively, both patients' radiculopathy disappeared, improving their activities of daily living and enabling them to walk and work. Also, the total contact area and maximum contact pressure of the nerve tissue decreased from 30% to 80% and from 33% to 67%, respectively.

Conclusions

A new method for perioperative evaluation and simulation, FEM can be to visualize and digitize the conditions of the lesion causing radiculopathy. FEM that can overcome both time and economic constraints in routine clinical practice is needed.

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