Vascular resections in minimally invasive surgery for pancreatic cancer

Pancreatic ductal adenocarcinoma(PDAC)is characterised by poor oncological outcome and is the seventh cause of cancer-related deaths worldwide.With the advances in surgical technology,oncological treatment,and critical care,extended pancreatic resections including vascular resections have become more frequently performed in specialised centres.Furthermore,the boundaries of resectability continue to be pushed in order to achieve a potentially curative approach in selected patients in combination with neoadjuvant and adjuvant treatment strategies.This review gives an overview on the current state of venous and arterial resections in PDAC surgery with particular attention given to the minimally invasive approach.

Transanal minimally invasive surgery to rescue anastomosis following leak after low anterior resection: A case report

Restorative low anterior resection(LAR)for rectal cancer carries a significant risk of anastomotic leak:One of the most feared complications in colorectal surgery.Operative management may include takedown of the anastomosis and end colostomy which,in some cases,is permanent.Other contemporary operative measures include over the scope clips and Endosponge.Recently,there have been case reports and a Society of American Endoscopic and Gastrointestinal Surgeons video on the novel use of transanal minimally invasive surgery(TAMIS)in the management of anastomotic leak.We present a 59-year-old female who underwent LAR after declining radiotherapy for a bulky 9 cm rectal tumour 9-10 cm from the anal verge.Following clinical deterioration,computed tomography demonstrated an anastomotic leak communicating with a 5-cm pelvic collection containing gas.At laparoscopy,pus and faeculent material were washed from the pelvic cavity and drains were placed.Intra-operative endoscopy demonstrated a 7-8 mm dehiscence at the anastomosis.The defect(approximately 7 cm from the anal verge)was successfully closed using TAMIS and a running V-lock suture.The patient recovered well and was discharged home on post-operative day 20.In this case,a low colorectal anastomotic leak was successfully rescued with TAMIS.This novel technique may be useful in the armamentarium of colorectal surgeons experienced in TAMIS.

Novel technique for anastomotic salvage using transanal minimally invasive surgery:A case report

BACKGROUND Anastomotic leak(AL) after low anterior resection(LAR) can be a highly morbid complication.The incidence of AL ranges from 5% to 20% depending on patient characteristics and the distance of the anastomosis from the anal verge.Low anastomoses and leaks pose technical challenges for endoscopic treatment.The aim of this report was to describe the use of a commercially available laparoscopic energy device through a transanal minimally invasive surgery(TAMIS) port for the management of a symptomatic leak not requiring relaparotomy(grade B) after a LAR with diverting loop ileostomy.CASE SUMMARY A TAMIS GelPOINT Path port was inserted into the anus to access the distal rectum.Pneumorectum was achieved with AirSeal insufflation and a 30 degree laparoscope was introduced through a trocar.A LigaSure TM Retractable L-Hook device was then used to perform a septotomy of the chronic sinus tract identified posterior to the coloproctostomy.The procedure was then repeated twice in three weeks intervals with ultimate resolution of the chronic leak cavity.Several months after serial TAMIS septotomies,barium enema demonstrated a patent anastomosis with no evidence of persistent leak or stricture.The patient subsequently underwent ileostomy reversal and has had no significant postoperative issues.CONCLUSION TAMIS septotomy with the LigaSure TM Retractable L-Hook is a feasible andeffective,minimally invasive salvage technique for the treatment of grade B ALs.Larger studies are needed to assess the generalizability and long-term results of this technique.

Present situation of minimally invasive surgical treatment for early gastric cancer

Minimally invasive surgery is a kind of surgical operation,which is performed by using professional surgical instruments and equipment to inactivate,resect,repair or reconstruct the pathological changes,deformities and wounds in human body through micro-trauma or micro-approach,in order to achieve the goal of treatment,its surgical effect is equivalent to the traditional open surgery,while avoiding the morbidity of conventional surgical wounds.In addition,it also has the advantages of less trauma,less blood loss during operation,less psychological burden and quick recovery on patients,and these minimally invasive techniques provide unique value for the examination and treatment of gastric cancer patients.Surgical minimally invasive surgical techniques have developed rapidly and offer numerous options for the treatment of early gastric cancer(EGC):endoscopic mucosal resection(EMR),underwater EMR(UEMR),endoscopic submucosal dissection(ESD),endoscopic full-thickness resection(EFTR),endoscopic submu-cosal excavation(ESE),submucosal tunnel endoscopic resection,laparoscopic and endoscopic cooperative surgery(LECS);Among them,EMR,EFTR and LECS technologies have a wide range of applications and different modific-ations have been derived from their respective surgical operations,such as band-assisted EMR(BA-EMR),conven-tional EMR(CEMR),over-the-scope clip-assisted EFTR,no-touch EFTR,the inverted LECS,closed LECS,and so on.These new and improved minimally invasive surgeries are more precise,specific and effective in treating different types of EGC.

Transanal minimally invasive surgery using laparoscopic instruments of the rectum:A review

Transanal minimally invasive surgery(TAMIS)was first described in 2010 as an alternative to transanal endoscopic microsurgery(TEM).The TAMIS technique can be access to the proximal and mid-rectum for resection of benign and earlystage malignant rectal lesions and also used for noncurative intent surgery of more advanced lesions in patients who are not candidates for radical surgery.TAMIS has a shorter learning curve,reduced device setup time,flexibility in instrument use,and versatility in application than TEM.Also,TAMIS shows similar results in a view of the operation time,conversion rate,reoperation rate,and complication to TEM.For these reasons,TAMIS is an easily accessible,technically feasible,and cost-effective alternative to TEM.Overall,TAMIS has enabled the performance of high-quality local excision of rectal lesions by many colorectal surgeons.As TAMIS becomes more broadly utilized such as pelvic abscess drainage,rectal stenosis,and treatment of anastomotic dehiscence,the acquisition of appropriate training must be ensured,and the continued assessment and assurance of outcome must be maintained.

Trans-anal minimally invasive surgery for rectal neoplasia:Experience from single tertiary institution in China

AIM To evaluate the feasibility and safety of trans-anal minimally invasive surgery(TAMIS) from single institute in China. METHODS A retrospective review was conducted for patients with rectal neoplasia, who underwent TAMIS using single incision laparoscopic surgery-Port from January 2013 till January 2016 by a group of colorectal surgeons from Gastrointestinal Center Unit Ⅲ, Peking University Cancer Hospital. Patients' demographic data, surgical related information, post-operational pathology, as well as perioperative follow-up were all collected. RESULTS Twenty-five patients with rectal neoplasia were identified consequently. Complete full-thickness excision was achieved in all cases without conversion. 22(88%) cases had rectal malignancies [6 were adenocarcinomas and 16 were neuroendocrine tumors(NET)], while 3 patients had adenomas. Mean surgical duration was 61.3 min, and mean post-operative stay were 2.7 d. Post-operational examination demonstrated 5 cases had positive resection margin: 2 adenocarcinoma cases and 1 NET case with positive lateral margin, and the other 2 NET cases with positive basal margin. The curve of operation time for TAMIS cases suggested a minimum of 10 cases for a laparoscopic surgeon proficient withthis technique. CONCLUSION TAMIS was demonstrated to be reproducible and safe,with a relatively short learning process for laparoscopic surgeons in selected cases for rectal neoplasia. Longterm oncological outcome needs to be determined by further investigation.

Laparoscopic liver resection: Toward a truly minimally invasive approach

In the surgical treatment of hepatocellular carcinoma and colorectal liver metastasis, it is important to preserve sufficient liver volume after resection in order to avoid post-hepatectomy liver sufficiency and to increase the feasibility of repeated hepatectomyin case of intrahepatic recurrence. Parenchymasparing approach, which minimizes the extent of resection while obtaining sufficient surgical margins, has been developed in open hepatectomy. Although this approach can possibly have positive impacts on morbidity and mortality, it is not popular in laparoscopic approach because parenchyma-sparing resection is technically demanding especially by laparoscopy due to its intricate curved transection planes. "Small incision, big resection" is the words to caution laparoscopic surgeons against an easygoing trend to seek for a superficial minimal-invasiveness rather than substantial patient-benefits. Minimal parenchyma excision is often more important than minimal incision. Recently, several reports have shown that technical evolution and accumulation of experience allow surgeons to overcome the hurdle in laparoscopic parenchymasparing resection of difficult-to-access liver lesions in posterosuperior segments, paracaval portion, and central liver. Laparoscopic surgeons should now seek for the possibility of laparoscopic parenchyma-sparing hepatectomy as open approach can, which we believe is beneficial for patients rather than just a small incision and lead laparoscopic hepatectomy toward a truly minimally-invasive approach.

Current status of minimally invasive liver surgery for cancers

Hepatocellular carcinoma(HCC)patients have chronic liver disease with functional deterioration and multicentric oncogenicity.Liver surgeries for the patients should be planned on both oncological effects and sparing liver function.In colorectal patients with post-chemotherapy liver injury and multiple bilateral tumors,handling multiple tumors in a fragile/easy-to-bleed liver is an important issue.Liver surgery for biliary tract cancers is often performed as a resection of large-volume functioning liver with extensive lymphadenectomy and bile duct resection/reconstruction.Minimally invasive liver surgery(MILS)for HCC is applied with the advantages of laparoscopic for cases of cirrhosis or repeat resections.Small anatomical resections using the Glissonian,indocyanine greenguided,and hepatic vein-guided approaches are under discussion.In many cases of colorectal liver metastases,MILS is applied combined with chemotherapy owing to its advantage of better hemostasis.Two-stage hepatectomy and indocyanine green-guided tumor identification for multiple bilateral tumors are under discussion.In the case of biliary tract cancers,MILS with extensive lymphadenectomy and bile duct resection/reconstruction are developing.A robotassisted procedure for dissection of major vessels and handling fragile livers may have advantages,and well-simulated robot-assisted procedure may decrease the difficulty for biliary tract cancers.

Current status of minimally invasive surgery for pancreatic cancer

Pancreatic cancer(PC)is the most lethal cancer among digestive system cancers.Although the only way to radically cure PC is surgical resection,complex surgical procedures and severe post-operative complications lead to high mortality.In recent years,minimally invasive surgery has become more common for PC.Minimally invasive pancreatic resection(MIPR)with the laparoscopic or robotic method has shown its superiority compared with traditional surgery.However,increasing evidence indicates that the long-term or even short-term outcomes of MIPR for PC patients remain controversial.Moreover,the indications and learning curve of MIPR require further assessment.This review aims to discuss the progress in current MIPR,analyze the specific problems and obstacles in the development of MIPR,and try to standardize MIPR procedures and improve the outcomes of MIPR.

The impact of minimally invasive surgeries for the treatment of symptomatic benign prostatic hyperplasia on male sexual function： a systematic review

A systematic review of randomized controlled trials and cohort studies was conducted to evaluate data for the effects of minimally invasive procedures for treatment of symptomatic benign prostatic hyperplasia （BPH） on male sexual function. The studies searched were trials that enrolled men with symptomatic BPH who were treated with laser surgeries, transurethral microwave therapy （TUMT）, transurethral needle ablation of the prostate （TUNA）, transurethral ethanol ablation of the prostate （TEAP） and high-intensity frequency ultrasound （HIFU）, in comparison with traditional transurethral resection of the prostate （TURP） or sham operations. A total of 72 studies were identified, of which 33 met the inclusion criteria. Of the 33 studies, 21 were concerned with laser surgeries, six with TUMT, four with TUNA and two with TEAP containing information regarding male sexual function. No study is available regarding the effect of HIFU for BPH on male sexual function. Our analysis shows that minimally invasive surgeries for BPH have comparable effects to those of TURP on male erectile function. Collectively, less than 15.4% or 15.2% of patients will have either decrease or increase, respectively, of erectile function after laser procedures, TUMT and TUNA. As observed with TURP, a high incidence of ejaculatory dysfunction （EjD） is common after treatment of BPH with holmium, potassium-titanyl-phosphate and thulium laser therapies （〉 33.6%）. TUMT, TUNA and neodymium：yttrium aluminum garnet visual laser ablation or interstitial laser coagulation for BPH has less incidence of EjD, but these procedures are considered less effective for BPH treatment when compared with TURP.

Assessment for the minimal invasiveness of laparoscopic liver resection by interleukin-6 and thrombospondin-1

BACKGROUND Laparoscopic surgery has been introduced as a minimally invasive technique for the treatment of various field.However,there are few reports that have scientifically investigated the minimally invasive nature of laparoscopic liver resection(LLR).AIM To investigate whether LLR is scientifically less invasive than open liver resection.METHODS During December 2011 to April 2015,blood samples were obtained from 30 patients who treated with laparoscopic(n=10,33%)or open(n=20,67%)partial liver resection for liver tumor.The levels of serum interleukin-6(IL-6)and plasma thrombospondin-1(TSP-1)were measured using ELISA kit at four time points including preoperative,immediate after operation,postoperative day 1(POD1)and POD3.Then,we investigated the impact of the operative approaches during partial hepatectomy on the clinical time course including IL-6 and TSP-1.RESULTS Serum level of IL-6 on POD1 in laparoscopic hepatectomy was significantly lower than those in open hepatectomy(8.7 vs 30.3 pg/mL,respectively)(P=0.003).Plasma level of TSP-1 on POD3 in laparoscopic hepatectomy was significantly higher than those in open hepatectomy(1704.0 vs 548.3 ng/mL,respectively)(P=0.009),and have already recovered to preoperative level in laparoscopic approach.In patients with higher IL-6 Levels on POD1,plasma level of TSP-1 on POD3 was significantly lower than those in patients with lower IL-6 Levels on POD1.Multivariate analysis showed that open approach was the only independent factor related to higher level of IL-6 on POD1[odds ratio(OR),7.48;95%confidence interval(CI):1.28-63.3;P=0.02].Furthermore,the higher level of serum IL-6 on POD1 was significantly associated with lower level of plasm TSP-1 on POD3(OR,5.32;95%CI:1.08-32.2;P=0.04)in multivariate analysis.CONCLUSION In partial hepatectomy,laparoscopic approach might be minimally invasive surgery with less IL-6 production compared to open approach.

Laparoscopic gastric cancer surgery:Current evidence andfuture perspectives

Laparoscopic gastrectomy has been widely accepted as a standard alternative for the treatment of early-stage gastric adenocarcinoma because of its favorable shortterm outcomes. Although controversies exist, such as establishing clear indications, proper preoperative staging, and oncologic safety, experienced surgeons and institutions have applied this approach, along with various types of function-preserving surgery, for the treatment of advanced gastric cancer. With technical advancement and the advent of state-of-the-art instruments, indications for laparoscopic gastrectomy are expected to expand as far as locally advanced gastric cancer. Laparoscopic gastrectomy appears to be promising; however, scientific evidence necessary to generalize this approach to a standard treatment for all relevant patients and care providers remains to be gathered. Several multicenter, prospective randomized trials in high-incidence countries are ongoing, and results from these trials will highlight the short- and long-term outcomes of the approach. In this review, we describe up-to-date findings and critical issues regarding laparoscopic gastrectomy for gastric cancer.

International consensus statement on robotic hepatectomy surgery in 2018

The robotic surgical system has been applied in liver surgery. However,controversies concerns exist regarding a variety of factors including the safety,feasibility, efficacy, and cost-effectiveness of robotic surgery. To promote the development of robotic hepatectomy, this study aimed to evaluate the current status of robotic hepatectomy and provide sixty experts' consensus and recommendations to promote its development. Based on the World Health Organization Handbook for Guideline Development, a Consensus Steering Group and a Consensus Development Group were established to determine the topics, prepare evidence-based documents, and generate recommendations. The GRADE Grid method and Delphi vote were used to formulate the recommendations. A total of 22 topics were prepared analyzed and widely discussed during the 4 meetings. Based on the published articles and expert panel opinion, 7 recommendations were generated by the GRADE method using an evidence-based method, which focused on the safety, feasibility, indication,techniques and cost-effectiveness of hepatectomy. Given that the current evidences were low to very low as evaluated by the GRADE method, further randomized-controlled trials are needed in the future to validate these recommendations.

Laparoscopic liver resection: Current role and limitations

Laparoscopic liver resection (LLR) for the treatment of benign and malignant liver lesions is often performed at specialized centers. Technological advances, such as laparoscopic ultrasonography and electrosurgical tools, have afforded surgeons simultaneous improvements in surgical technique. The utilization of minimally invasive techniques for liver resection has been reported to reduce operative time, decrease blood loss, and shorten length of hospital stay with equivalent postoperative mortality and morbidity rates compared to open liver resection (OLR). Non-anatomic liver resection and left lateral sectionectomy are now routinely performed laparoscopically at many institutions. Furthermore, major hepatic resections are performed by pure laparoscopy, hand-assisted technique, and the hybrid method. In addition, robotic surgery and single port surgery are revealing early promising results. The consensus recommendation for the treatment of benign liver disease and malignant lesions remains unchanged when considering a laparoscopic approach, except when comorbidities and anatomic limitations of the liver lesion preclude this technique. Disease free and survival rates after LLR for hepatocellular carcinoma and metastatic colon cancer correspond to OLR. Patient selection is a significant factor for these favorable outcomes. The limitations include LLR of superior and posterior liver lesions; however, adjustments in technique may now consider a laparoscopic approach as a viable option. As growing data continue to reveal the feasibility and efficacy of laparoscopic liver surgery, this skill is increasingly being adopted by hepatobiliary surgeons. Although the full scope of laparoscopic liver surgery remains infrequently used by many general surgeons, this technique will become a standard in the treatment of liver diseases as studies continue to show favorable outcomes.

Advances and challenges in laparoscopic surgery in the management of hepatocellular carcinoma

Hepatocellular carcinoma is the fifth most common malignancy and the third most common cause of cancer-related mortality worldwide. From the wide variety of treatment options, surgical resection and liver transplantation are the only therapeutic ones. However, due to shortage of liver grafts, surgical resection is the most common therapeutic modality implemented. Owing to rapid technological development, minimally invasive approaches have been incorporated in liver surgery. Liver laparoscopic resection has been evaluated in comparison to the open technique and has been shown to be superior because of the reported decrease in surgical incision length and trauma, blood loss, operating theatre time, postsurgical pain and complications, R0 resection, length of stay, time to recovery and oral intake. It has been reported that laparoscopic excision is a safe and feasible approach with near zero mortality and oncologic outcomes similar to open resection. Nevertheless, current indications include solid tumors in the periphery < 5 cm, especially in segments Ⅱ through Ⅵ, while according to the consensus laparoscopic major hepatectomy should only be performed by surgeons with high expertise in laparoscopic and hepatobiliary surgery in tertiary centers. It is necessary for a surgeon to surpass the 60-cases learning curve observed in order to accomplish the desirable outcomes and preserve patient safety. In this review, our aim is to thoroughly describe the general principles and current status of laparoscopic liver resection for hepatocellular carcinoma, as well as future prospects.

Single port laparoscopic liver surgery:A minireview

Nowadays,the trend is to perform surgeries with"scarless"incisions.In light of this,the single-port laparoscopic surgery(SPLS)technique is rapidly becoming widespread due to its lack of invasiveness and its cosmetic advantages,as the only entry point is usually hidden in the umbilicus.The interest in"scarless"liver resections did not grow as rapidly as the interest in other scarless surgeries.Hepatopancreatobiliary surgeons are reluctant to operate a malignant lesion through a narrowincision with limited exposure.There are concerns over adverse oncological outcomes for single-port laparoscopic liver resections(SPL-LR)for hepatocellular carcinoma or metastatic colorectal cancer.In addition,getting familiar with using the operating instruments through a narrow incision with limited exposure is very challenging.In this article,we reviewed the published literature to describe history,indications,contraindications,ideal patients for new beginners,technical difficulty,advantages,disadvantages,oncological concern and the future of SPL-LR.

Use of transanal minimally invasive surgery for endoscopic resection of rectal tumour:a technical note

Background:The aim of this article is to report and discuss a case of lower rectal cancer undergoing endoscopic transanal resection of tumour(ETART)using a transanal minimally invasive surgery(TAMIS)approach.Methods:A technical note on a case report.An innovative approach for ETART using TAMIS.Results:This is the first-ever case report of lower rectal cancer treated by ETART using a TAMIS approach.The procedure was completed successfully without any operative or peri-operative complication.Peri-operative flexible sigmoidoscopy confirmed a wide and patent rectal lumen.Conclusion:Use of a TAMIS approach for ETART to remove lower rectal cancer for palliation can be technically very effective compared with conventional ETART,due to the potential advantages of avoiding contaminant fluid spillage,easy access,better visualization compared with conventional ETART,and being user-friendly.The results from larger cohorts of patients undergoing TAMIS ETART are required before recommending the routine use of this technique.However,until then,this approach may be considered as an alternative to conventional ETART.

Successful treatment of an enormous rectal mucosa-associated lymphoid tissue lymphoma by endoscopic full-thickness resection:A case report

BACKGROUND Colorectal mucosa-associated lymphoid tissue lymphoma(MALToma),a rare kind of nongastric MALToma,lacks consensus on its endoscopic features and standard therapies.According to previous studies on the clinical characteristics and outcomes of colorectal MALToma,endoscopic resection remains a good therapeutic strategy.CASE SUMMARY A 71-year-old woman suffered intermittent hematochezia for 1 mo,accompanied with abdominal pains but without weight loss,fever,chills or fatigue.Colonoscopy showed a massive hemispheric mass with rough and hyperemic mucosa in the lower rectum.Narrow-band imaging magnifying endoscopy detected some branching abnormal blood vessels and disappearance of glandular structure,which was similar with the tree-like appearance sign in gastric MALToma.Endoscopic ultrasonography revealed the lesion to be hypoechoic,boundary-defined,and echo uniform inside,originating from the muscularis propria.Abdominal enhanced computed tomography(CT)demonstrated a soft tissue mass with defined boundary.No enlarged superficial lymph nodes were detected by B-mode ultrasound.C13-urea breath test and serum Helicobacter pylori antibody were both negative.The patient underwent endoscopic full-thickness resection.Postoperative pathological analysis indicated colorectal MALToma.The patient remained asymptomatic after discharge,and follow-up positron emission tomography–CT and colonoscopy showed no residual lesion,remnants or lymph node metastasis.CONCLUSION This case provides new information on the specific endoscopic features of colorectal MALToma and an alternative treatment for patients.

Laparoscopic liver resection in China

In 1991,laparoscopic liver resection(LLR)was firstly reported by Reich and was subsequently firstly reported in China in 1994 by Zhou.1,2 Dramatic improvements had been made in this procedure in the ensuing 26 years.The first and second international consensus conferences on laparoscopic liver resection were held in 2008 and 2014 and will continue to be held every 6 years.The international laparoscopic liver society formed in 2016 and its first international congress will be held in Paris in July 2017.The advantage of LLR had been recognized by patients and surgeons and is gradually replacing conventional open liver resection in some regions of the world.

微创McKeown食管癌根治术后疲劳综合征的相关危险因素分析

目的 探讨微创McKeown食管癌根治术后疲劳综合征(postoperative fatigue syndrome,POFS)的相关危险因素。方法 前瞻性收集2022年1月至2023年6月于南通市肿瘤医院行微创McKeown手术的80例食管癌患者的临床资料,依据围手术期疲劳评测量表(identity-consequence fatigue scale,ICFS)对纳入的患者实施术后疲劳状况的评估,然后将患者分为POFS组(n=34)和非POFS组(n=46)。通过电子病历收集两组患者的围手术期临床资料并进行单因素分析,最后采用多因素Logistic回归分析POFS的相关因素。结果 80例患者术后的ICFS总分为(82.21±6.64)分,显著高于术前的(57.34±4.11)分(P<0.05),且日常活动、精力、活力、注意力和疲劳维度5个维度评分也均显著高于术前(均P<0.05)。80例患者术后发生POFS为34例,发生率为42.50%。单因素分析显示,POFS组年龄显著大于非POFS组(P<0.05),POFS组术前合并焦虑或抑郁、睡眠障碍、低蛋白血症比例均显著高于非POFS组(均P<0.05),POFS组术前六分钟步行试验(6-minute walking test,6MWT)距离<350 m比例显著高于非POFS组(P<0.05),POFS组麻醉时间显著短于非POFS组(P<0.05),POFS组术后视觉模拟量评分法(visual analogue scale,VAS)评分、术后血清C反应蛋白(C-reactive protein,CRP)水平、术后乳酸水平均显著高于非POFS组(均P<0.05),POFS组术后血红蛋白(hemoglobin,Hb)水平显著低于非POFS组(P<0.05)。多因素Logistic回归分析显示,术前合并焦虑或抑郁、低蛋白血症、术前6MWT距离<350 m、麻醉时间短、术后血清CRP水平高均是微创McKeown食管癌根治术POFS发生的独立危险因素(均P<0.05)。结论 微创McKeown食管癌根治术后POFS发生率较高,且与术前焦虑抑郁情绪、低蛋白血症、6MWT距离过短、麻醉时间偏短和CRP水平偏高等因素密切相关,临床应重视此类危险因素并制订针对性的措施对其进行干预,以降低POFS发生率。