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Abstract

Background

Laparoscopic Nissen fundoplication (LNF) is the most common standard technique worldwidely for Gastroesophageal reflux disease (GERD). Another type of fundoplication, laparoscopic Toupet fundoplication (LTF), intends to reduce incidence of postoperative complications. A systematic review and meta-analysis are required on short- and long-term outcomes based on randomized controlled trials (RCTs) between LNF and LTF.

Methods

We searched databases including PubMed, Cochrane, Embase, and Web of Knowledge for RCTs comparing LNF and LTF. Outcomes included postoperative reflux recurrence, postoperative heartburn, dysphagia and postoperative chest pain, inability to belch, gas bloating, satisfaction with intervention, postoperative esophagitis, postoperative DeMeester scores, operating time (min), in-hospital complications, postoperative use of proton pump inhibitors, reoperation rate, postoperative lower oesophageal sphincter (LOS) pressure (mmHg). We assessed data using risk ratios and weighted mean differences in meta-analyses.

Results

Eight eligible RCTs comparing LNF (n = 605) and LTF (n = 607) were identified. There were no significant differences between the LNF and LTF in terms of postoperative reflux recurrence, postoperative heartburn, postoperative chest pain, satisfaction with intervention, reoperation rate in short and long term, in-hospital complications, esophagitis in short term, and gas bloating, postoperative DeMeester scores, postoperative use of proton pump inhibitors, reoperation rate in long term. LTF had lower LOS pressure (mmHg), fewer postoperative dysphagia and inability to belch in short and long term and gas bloating in short term compared to LNF.

Conclusion

LTF were equally effective at controlling reflux symptoms and improving the quality of life, but with lower rate of complications compared to LNF. We concluded that LTF surgical treatment was superior for over 16 years old patients with typical symptoms of GERD and without upper abdominal surgical history upon high-level evidence of evidence-based medicine.

Keywords

gastro-esophageal reflux disease laparoscopic fundoplication randomized controlled trials meta-analysis

Introduction

Gastroesophageal reflux disease (GERD) is a common digestive system disease, which causes reflux from stomach contents. GERD has typical symptoms and these symptoms are divided into esophageal or extraesophageal syndromes by The Montreal Definition and Classification of GERD,¹ such as retrosternal burning, regurgitation, and reflux cough syndrome, reflux asthma syndrome etc. A large increase has been witnessed from 1990 to current years both in the global incidence and the global prevalence of all ages.^2-4 GERD is a worldwide disease with different prevalence in different region.⁵ The highest was in North America with prevalence estimation from 18.1% to27.8%; the following area was in South America with 23.0%; the lowest was in East Asia with 2.5%–7.8%.⁶ Compared to medical treatment, surgical treatment offers a choice of a treatment for GERD(7-9). In terms of surgery, the short-term morbidity rate and hospital stay length declines using laparoscopic fundoplication.^10-12 Laparoscopic Nissen (360°) fundoplication (LNF) is the most common standard technique worldwide for GERD.⁷ There is another anti-reflux procedure, namely, the partial fundoplication. The most common partial fundoplication technique is the laparoscopic Toupet (270°) fundoplication (LTF) with the purpose to lower incidence of postoperative dysphagia, bloating, flatulence, and reoperation rate.^13,14 Despite the available evidence shows LTF is a safe and effective alternative anti-reflux procedure, high-quality evidence is needed to support LTF as the priority.¹²

In the past decades, several randomized controlled trials (RCTs) comparing between LNF and LTF were published,^15-24 and controversy over the optimal surgical method is still ongoing. Short-term and long-term complications are found after fundoplication. Symptoms occur after fundoplication, including heartburn, dysphagia, chest pain, inability to belch, gas bloating, and diarrhea. The short-term postoperative complications may be caused by surgically induced edema and inflammation,²⁵ and the long-term postoperative complications occurrence comes from structural changes caused by surgery. Although complications are generally self-limiting, which is very common, some cases with severe complications are unable to maintain hydration and nutrition with a liquid diet.^26,27 The patients who suffer severely from complications would undergo extra treatments in short-term period after surgery. Several meta-analyses^10,13,28-31 have been conducted comparing long-term outcomes between LNF and LTF based on RCTs until 2021. They only included outcomes with a follow-up time greater than 12 months but without the short-term outcomes. However, these short-term outcomes would result in additional health care resource expenditures, such as balloon or probe to dilate the esophagus and if various non-surgical treatments cannot effectively relieve the symptoms, surgical treatment is needed to lift the obstruction. Therefore, it is necessary to systematically review and meta-analysis both short- and long-term potential benefits or the potential side effects of all RCTs comparing LNF with LTF for GERD to develop high-level evidence of evidence-based medicine of which surgical treatment is superior.

Methods

Our meta-analysis was carried out and the results were described as the PRISMA statement.

Search Strategy and Selection Criteria

We selected the studies published till 21 Nov, 2021, by searching PubMed, Cochrane, Embase, and Web of Knowledge. We used the following combined MeSH and Entry terms: “Gastroesophageal Reflux” and “Fundoplication” and “randomized controlled trial”. The complete search used for PubMed was: (((“Gastroesophageal Reflux”[Mesh]) OR ((((((((((((((((((Gastric Acid Reflux[Title/Abstract]) OR (Acid Reflux, Gastric[Title/Abstract])) OR (Reflux, Gastric Acid[Title/Abstract])) OR (Gastric Acid Reflux Disease[Title/Abstract])) OR (Gastro-Esophageal Reflux Disease[Title/Abstract])) OR (Gastro Esophageal Reflux Disease[Title/Abstract])) OR (Gastro-Esophageal Reflux Diseases[Title/Abstract])) OR (Reflux Disease, Gastro-Esophageal[Title/Abstract])) OR (Gastro-oesophageal Reflux[Title/Abstract])) OR (Gastro oesophageal Reflux[Title/Abstract])) OR (Reflux, Gastro-oesophageal[Title/Abstract])) OR (Gastroesophageal Reflux Disease[Title/Abstract])) OR (GERD[Title/Abstract])) OR (Reflux, Gastroesophageal[Title/Abstract])) OR (Esophageal Reflux[Title/Abstract])) OR (Gastro-Esophageal Reflux[Title/Abstract])) OR (Gastro Esophageal Reflux[Title/Abstract])) OR (Reflux, Gastro-Esophageal[Title/Abstract]))) AND ((“Fundoplication”[Mesh]) OR (((((Nissen Operation[Title/Abstract]) OR (Operation, Nissen[Title/Abstract])) OR (Nissen[Title/Abstract])) OR (Toupet[Title/Abstract])) OR (Antireflux[Title/Abstract])))) AND (randomized controlled trial[Publication Type] OR randomized[Title/Abstract] OR placebo[Title/Abstract]). We applied the language limitations to English.

Inclusion Criteria

Inclusion criteria were: (i) Randomized controlled trial comparison between LNF and LTF. (ii) Study population - over 16 years old patient with typical symptoms of GERD, dominated by heartburn and acid regurgitation. (iii) Patients with 24-hour pathological pH surveillance or endoscopy-tested esophagitis. (iv) Patients diagnosed with GERD. (v) Raw data can be drawn from the study to calculate the results.

Exclusion Criteria

Exclusion criteria were: (i) Patients who had previous gastric or antireflux surgery or other major upper abdominal surgical history. (ii) Pregnancy. (iii) The Toupet fundoplication is a non-270° posterior partial fundoplication.

Outcomes of Interest and Definitions

We compared the LNF and LTF treatment strategy for GERD. The outcomes of the assessment were shown below: the short- and long-term outcomes of postoperative reflux recurrence (means no relief of reflux symptoms after surgery), postoperative heartburn (defined as any burning sensation behind the sternum and/or the sub-xiphoid region with or without a relation to food intake and/or posture),³² dysphagia, postoperative chest pain, inability to belch, gas bloating, satisfaction with intervention, esophagitis, DeMeester scores, in-hospital complications, reoperation rate and lower oesophageal sphincter (LOS) pressure (mmHg). Among parameters mentioned above, the primary outcome parameters were specified as postoperative reflux recurrence, postoperative heartburn, postoperative dysphagia, postoperative chest pain, postoperative inability to belch, postoperative gas bloating, satisfaction with intervention. Postoperative esophagitis, postoperative DeMeester scores, operating time (min), in-hospital complications, postoperative use of proton pump inhibitors, reoperation rate, postoperative LOS pressure, were regarded as secondary outcome parameters. The short term implied a postoperative period with no more than 6 months postoperatively, while the long term meant at least 1 year.

Data Extraction

Two independent investigators (Gen Li, Ning Jiang) browsed study titles and abstracts, and studies that met the inclusion criteria were retrieved for full-text assessment. The final included studies were selected, and disagreements were resolved by an additional third investigator (Chuanliang Peng). The following data was extracted by the same two investigators separately. For all studies that met the inclusion criteria, the following data were extracted by both investigators separately: Year of publication, country in which the study was conducted, demographic baseline characteristic, study design, surgical technique, study period, inclusion and exclusion criteria, follow-up period, number of participants, outcomes analysis. Disagreements among investigators are resolved through discussion and consensus. In case of missing data, we contacted the authors of the original study to provide relevant data information. The published RCTs results for the same group of patients at different stages were collected and synthesized in our study.

Risk of Bias Assessment

Two investigators (Gen Li, Ning Jiang) completed risk of bias assessment of all studies independently by using the Cochrane ‘Risk of bias' tool.^33,34 ‘Low risk of bias', ‘high risk of bias', or ‘unclear risk of bias' are assigned for each ‘Risk of bias’ domain using the specific questions detailed below.

1. Random sequence generation;

2. Allocation concealment;

3. Blinding of participants and personnel;

4. Blinding of outcome assessment;

5. Incomplete outcome data;

6. Selective outcome reporting;

7. Other bias.

We also use the funnel plots to evaluate the publication bias for each outcome included in the trial.

Statistical Analysis

Data extracted from inclusion studies were integrated with Review Manager 5.4 provided by the Cochrane Collaboration. Outcomes reported by two or more studies were pooled in meta-analyses. Dichotomous and continuous outcomes were presented as risk ratios (RRs) and weighted mean differences (MD) respectively. We pooled the data of dichotomous and continuous outcomes using the Mantel–Haenszel and the inverse variance method. The fixed-effects model was used if heterogeneity was absent (χ2 test, P > .1 and I² < 30%); otherwise, the random-effects model was used. We also did I² testing to assess the magnitude of the heterogeneity among studies, and the values higher than 30% indicated moderate-to-high heterogeneity. If excessive heterogeneity was present, the data were first rechecked. When unable to explain the causes of heterogeneity, we used subgroup or sensitivity analyses to explore its causes.

Results

Description of Studies

We identified 1415 potentially relevant publications, of which 8^15-24 (three literature were published based on one RCT study^21-23) were included in our analysis (Figure 1) including 1212 participants. We excluded one study³⁵ because of quasi-randomized controlled trails. Included trials were published between 2003 and 2019. There were 605 participants in LNF and 607 participants in LTF antireflux Operations, where the LTF we included were 270° posterior partial fundoplication. Not all studies had provided data on results that were required. The publication flow is shown in Figure 1. In terms of qualitative outcome parameters, endpoints were assessed by telephone or letter questionnaires to investigate the prevalence of the same defined symptoms. Quantitative outcome parameters, namely the uniform standard objective data, were measured through the patient’s post-operative follow-up. The studies included to conduct meta-analyses all used the same assessment.

Figure 1.

Study flow diagram (a) and risk of bias graph (b) and risk of bias summary (c).

Quality Assessment

In two trials (Strate 2008,^21-23 Hakanson 2019¹⁸), the significant differences of demographic baseline characteristics and preoperative complications in two groups were not reported. Studies included the length of the fundoplication differed from 1 to 4 cm, and the length of the fundoplication was similar in both arms. But one study²⁰ took a 1 cm wrap in LNF and a 2 cm wrap in LTF. In terms of follow-up time, short-term was defined as less than 12 months, and long-term was defined as more than or equal to 12 months. Both short- and long-term outcomes are included in our study. Characteristics of included studies are listed in Table 1.

Table 1.

Details of included randomized controlled trial studies.

Reference	Country	N (LNF/LTF)	Age (years) (LNF/LTF)	DSGV (LNF/LTF)	Bougies (Fr) (LNF/LTF)	Wrap Length (cm) (LNF/LTF)	Short-Term Outcomes	Long-Term Outcomes
Booth 2008	England	59/58	45.3 (21-86)/44.2 (19-69)	Yes/Yes	56/56	2/2	6 months	12 months
Chrysos 2003	Greece	14/19	61.7±8.7/59.2±11.5	No/No	No/No	3-4/3-4	3 months	12 months
Guerin 2007	Belgium	64/57	NR	Yes/Yes	34/34	3/NR	Immediate	12 months
Håkanson 2019	Sweden	227/228	50.2±11.7/47.9±11.7	Yes/Yes	No/No	2/NR	6 weeks	12 months
Koch 2013	Austria	54/57	50.32(20-76)/51.87(25-81)	Yes/Yes	58-60/NR	2/NR	NR	12 months
Shaw 2010	South Africa	47/48	45.2(28-72)/45.6(25-67)	Yes/Yes	52/52	1/2	NR	60 months
Strate 2008	Germany	100/100	56(20-80)	Yes/Yes	36/NR	2/NR	4 months	24 months
Wang 2015	China	40/40	57±13.2/57±10.8	Yes/Yes	32/32	2/2	6 weeks	24 months

DSGV division of short gastric vessels. NR no report.

Methodological Quality of Included Studies

The methodological quality of the included studies was based on the Cochrane 'Risk of bias' tool. Primary limitations resulted from lack of explanation for double-blinding processes,^16,19 and lack of explanation of how many follow-up patients were lost in each group and its reason.^15,17 In Booth 2008,¹⁵ more preoperative symptom of dysphagia were found in the LNF group compared with the LTF group. Review authors' judgements about each risk of bias item are presented as percentages among all included studies in (Figure 1). Funnel plots illustrates no significant publication bias in Supplemental File 1-19.

Postoperative Reflux Recurrence

Four studies assessed the short-term outcomes of postoperative reflux recurrence, and the meta-analysis of the postoperative reflux recurrence revealed excessive heterogeneity. Therefore, the random effects model was used for pooling data. There was no difference in this parameter between the two arms. (RR = 1.30, 95% CI, [.42, 4.05], P = .65). After removal of one study [Strate 2008], heterogeneity was significantly reduced and the result did not change. (RR = 2.11, 95% CI, [.74, 6.08], (P = .16); Chi², (P = .25); I² = 24%. Five studies analyzed the long-term outcomes of postoperative reflux recurrence, and the meta-analysis showed no significant difference in this outcome between the two arms (RR = 1.29, 95% CI, [.86, 1.92], P = .22) (Figure 2).

Figure 2.

Meta-analysis of short-term (a) and long-term (b) outcomes postoperative reflux recurrence.

Postoperative Heartburn

Three studies assessed the short-term outcomes of postoperative heartburn. The meta-analysis of the postoperative heartburn, the meta-analysis demonstrated no significant difference of both two arms (RR = 1.24, 95% CI, [.73, 2.10], P = .42). Four studies assessed the long-term outcomes of postoperative heartburn, and the meta-analysis revealed no significant difference in this outcome between the two arms (RR = .75, 95% CI, [.44, 1.27], P = .28) (Figure 3).

Figure 3.

Meta-analysis of short-term (a) and long-term (b) postoperative heartburn.

Postoperative Dysphagia

Five studies assessed the short-term outcomes of postoperative dysphagia. The meta-analysis of the postoperative dysphagia revealed excessive heterogeneity. Therefore, the random effects model was used for pooling data. There was no difference in this parameter between the two arms (RR = 1.60, 95% CI, [.68, 3.74], Chi², P = .65; I² = 86%). By exploring the possible causes of heterogeneity, we consider that the duration of short follow-up of the study¹⁷ was immediate, which could have affected the heterogeneity. After removing one study, heterogeneity was significantly reduced and the result favored LTF (RR = 2.26, 95% CI, [1.56, 3.27], P < .0001). Six studies assessed the long-term outcomes of postoperative dysphagia, and the meta-analysis revealed favored LTF (RR = 2.28, 95% CI, [1.43, 3.63], P = .0005) (Figure 4).

Figure 4.

Meta-analysis of short-term (a) and long-term (b) postoperative dysphagia.

Postoperative Chest Pain

Three studies assessed the short-term outcomes of postoperative chest pain. The meta-analysis of the postoperative chest pain, the meta-analysis revealed no significant difference in this outcome between the two arms (RR = 1.18, 95% CI, [.68, 2.06], P = .55). Three studies assessed the long-term outcomes of postoperative chest pain. The meta-analysis of the postoperative chest pain, the meta-analysis of the postoperative chest pain revealed excessive heterogeneity. Therefore, the random effects model was used for pooling data. There was no difference in this parameter between the two arms (RR = 1.30, 95% CI, [.10, 16.51], P = .84) (Figure 5).

Figure 5.

Meta-analysis of short-term (a) and long-term (b) postoperative chest pain.

Postoperative Inability to Belch

Three studies assessed the short-term outcomes of postoperative inability to belch. The meta-analysis of the postoperative inability to belch revealed excessive heterogeneity. Therefore, the random effects model was used for pooling data. There was no difference in this parameter between the two arms (RR = 1.42, 95% CI, [.26, 7.64] P = .68; Chi², P = .65; I² = 86%). In the same reason, we removed one study Guerin 2007.¹⁷ Heterogeneity was significantly reduced and the result favored LTF. (RR = 3.30, 95% CI, [1.26, 8.61], (P = .01). Three studies assessed the long-term outcomes of postoperative Inability to belch, and the meta-analysis revealed favored LTF (RR = 2.04, 95% CI, [1.19, 3.49], P = .009) (Figure 6).

Figure 6.

Meta-analysis of short-term (a) and long-term (b) Inability to belch.

Postoperative Gas Bloating

Four studies assessed the short-term outcomes of postoperative gas bloating. The meta-analysis of the postoperative gas bloating revealed excessive heterogeneity. Therefore, the random effects model was used for pooling data. There was no difference in this parameter between the two arms (RR = 1.40, 95% CI, [.55, 3.57]; P = .48; Chi², P = .01; I² = 73%). In the same reason, we removed one study Guerin 2007.¹⁷ Heterogeneity was significantly reduced and the result favored LTF (RR = 2.14, 95% CI, [1.30, 3.53], P = .003. Three studies assessed the long-term outcomes of postoperative gas bloating, and the meta-analysis showed no significant difference between the two arms (RR = 1.50, 95% CI, [.86, 2.64], P = .16) (Figure 7).

Figure 7.

Meta-analysis of short-term (a) and long-term (b) Gas bloating.

Satisfaction with Intervention

Two studies assessed the short-term outcomes of satisfaction with intervention. The meta-analysis of the satisfaction with intervention revealed no significant difference in this outcome between the two arms (RR = .97, 95% CI, [.88, 1.06]; P = .47); Six studies assessed the long-term outcomes of satisfaction with intervention, and the meta-analysis revealed no significant difference between the two arms (RR = 1.00, 95% CI, [.94, 1.06], P = .95) (Figure 8).

Figure 8.

Meta-analysis of short-term (a) and long-term (b) Satisfaction with intervention.

Postoperative Esophagitis

Two studies assessed the short-term outcomes of postoperative esophagitis. The meta-analysis of the postoperative esophagitis revealed excessive heterogeneity. Therefore, the random effects model was used for pooling data. The meta-analysis of the esophagitis revealed no significant difference in this outcome between the two arms (RR = 1.30, 95% CI, [.61, 2.80]; P = .50; Chi², P = .50; I² = 45%) (Figure 9).

Figure 9.

Meta-analysis of postoperative esophagitis (a), postoperative DeMeester scores (b), operating time (min) (c), in-hospital complications (d), postoperative use of proton pump inhibitors (e), reoperation rate (f), postoperative LOS pressure (mmHg) (g).

Postoperative DeMeester Scores

Four studies assessed the long-term outcomes of DeMeester scores. The meta-analysis of the postoperative DeMeester scores revealed excessive heterogeneity. Therefore, the random effects model was used for pooling data. The meta-analysis of the DeMeester scores revealed no significant difference in this outcome between the two arms (MD = −.26, 95% CI, [-2.59, 2.06]; P = .82; Chi², P = .18; I² = 39%) (Figure 9).

Operating Time (min)

Four studies assessed the operating time (min), where four studies with applied division of the short gastric vessels and one study was with non-division of the short gastric vessels. The meta-analysis of the operating time (min) revealed excessive heterogeneity. Therefore, the random effects model was used for pooling data. Operating time was shorter in patients undergoing LNF surgical (MD = −11.16, 95% CI, [-17.50, −4.82]; P = .0006; Tau² P = .02, I² = 64%). We removed one study Chrysos 2003.¹⁶ Heterogeneity was significantly reduced and the result did not change (MD = -7.42, 95% CI, [-11.22, −3.62], P = .0001) (Figure 9).

In-Hospital Complications

Five studies assessed the in-hospital complications (fundal wrap perforation, atelectasis, pleural effusion, haemorrhage, pneumothorax pneumothorax, intestinal perforation, parenchymal-splenic injuries and nervous vomiting). The meta-analysis of the in-hospital complications revealed no significant difference between the two arms (RR = 1.03, 95% CI, [.58, 1.82], P = .93) (Figure 9).

Postoperative Use of Proton Pump Inhibitors

Two studies assessed the postoperative use of proton pump inhibitors. The meta-analysis of using proton pump inhibitors postoperatively revealed no significant difference between the two arms (RR = 1.11, 95% CI, [.75, 1.64], P = .61) (Figure 9).

Reoperation Rate

Five studies assessed the reoperation rate. The meta-analysis of the reoperation rate revealed no significant difference between the two arms (RR = 1.94, 95% CI, [.82, 4.57] (P = .13) (Figure 9).

Postoperative LOS Pressure (mmHg)

Three studies assessed the long-term outcomes of postoperative LOS pressure (mmHg). We removed two studies Booth 2008¹⁵ and Strate 2008,²¹ where the raw data standard deviation cannot draw from the study to calculate the results. Postoperative LOS pressure (mmHg) was higher in patients LNF surgical (MD = 2.65, 95% CI, [1.64, 3.65], P < .00001) (Figure 9).

Discussion

In our meta-analysis, we included 8 RCTs that reported short- and long-term outcomes of postoperative of 1212 patients after a standardized surgical technique total (360°) LNF or a 270° circumferences LTF. Our findings indicated that, compared with LNF, LTF were equally effective at controlling reflux symptoms and improving the quality of life, without increasing the in-hospital complications and reoperation rate. Our analysis showed that LTF tended to have less LOS pressure (mmHg) of postoperative and more operating time (min). The rates of short- and long-term postoperative reflux recurrence, postoperative heartburn, postoperative chest pain, satisfaction with intervention and short-term postoperative esophagitis and long-term gas bloating, postoperative DeMeester scores, postoperative use of proton pump inhibitors were similar after LTF and LNF. Furthermore, LTF had lower risk for early term postoperative dysphagia, postoperative inability to belch, postoperative gas bloating complications and long-term complications postoperative dysphagia, postoperative inability to belch. These data supported LTF as a therapeutic strategy that had lower incidence complications antireflux surgery for treatment of GERD.

Since the literature on LNF in 1991, the most commonly surgery procedure for GERD is LNF, also known as the 360° stomach wrap.³⁶ The challenge with anti-reflux surgery is improving subjective symptoms while minimizing subjective side effects. LTF, also known as 270° stomach wrap, can minimize LNF complications. The fundoplication is the gold standard for surgical, which increases the ability of the esophagogastric junction to prevent reflux control.³⁷ Fundoplication creates a barrier against the reflux of all gastric substances (acidic and non-acidic), to relieve reflux-related proton-pump inhibitor refractory heartburn.³⁸ There are views proposed to adapt antireflux procedures to the results of pre-operative esophageal manometry and pH tests, but a growing body of evidence suggests that such a strategy is unnecessary.^15,21,39-42

In the last two decades, several high-quality random sequence generation and allocation concealment RCTs comparing LNF with LTF (270° stomach wrap) have been published. To prevent increasing heterogeneity among tests and reducing the reliability and accuracy of the meta-analysis results, we excluded the non-270° posterior partial Toupet fundoplication. Therefore, we have good comparability of baseline information on the LNF and the LTF. From 2010 to 2021, five meta-analyses^13,28-31 comparing the LNF and the LTF were published. However, for all the meta-analyses there were no report of the short-term outcomes of postoperative. To evaluate short- and long-term outcomes and explore symptom regression over time after LNF or LTF, it is therefore important to reevaluate and synthesize data from existing trials.

The short-term outcomes of one RCT Guerin 2007¹⁷ was the immediate postoperative result, which caused the excessive heterogeneity in the meta-analysis of the postoperative dysphagia, inability to belch, and gas bloating. The reason for that is anesthesia and pneumoperitoneum of laparoscopic would result in impaired gastrointestinal motility. This is different from tissue edema due to surgery, which is the cause of excessive heterogeneity. When the RCT causes excessive heterogeneity at the short-term meta-analysis, we would remove it. Different from the others, one of the RCT was no division of short gastric vessels. However, in our review, Chrysos 2003¹⁶ was included because, except of operative time, other aspects were identical. Some studies⁴³ have shown no difference in outcomes when comparing conventional fundoplication with no division of the short gastric vessels. Our study found that the postoperative LOS pressure (mmHg) was lower in the patients who undergoing LTF, which was appeared to be sufficient to prevent reflux of stomach contents. But our study demonstrated therapeutic effect of LNF and LTF were equivalent. Although our study showed that LTF increases the procedure time and LNF was simpler and easier to perform compared to LTF, based on the fewer complications of LTF, we suggest that a gradual transition from LNF to LTF should be arranged. By analyzing the follow-up results within five years, our research showed that LTF not only had equivalent reflux control compared to LNF, but also had fewer complications in the early postoperative period. Although results of follow-up beyond 5 years were rarely reported, a recent study where there were beyond 5 years of follow-up also supported our view.⁴⁴ The limitations of our meta-analysis were: the length of short-term and long-term follow-up was not uniform in original studies included in the meta-analysis; We excluded data that did not meet the uniform criteria resulting in less data available for meta-analysis and thus there were fewer objective outcome parameters in our research; Due to the limitations of the follow-up time in the included studies, no meta-analysis was conducted for results beyond 5 years of follow-up.

In terms of the current findings on surgical efficacy and complications, for over 16 years old patients with typical symptoms of GERD and without upper abdominal surgical history, the LTF has better data to support itself, but more researches are necessary to determine the superior treatment based on the short and long term for GERD.

Supplemental Material

Supplemental Material - Laparoscopic Nissen Versus Toupet Fundoplication for Short- and Long-Term Treatment of Gastroesophageal Reflux Disease: A Meta-Analysis and Systematic Review

Supplemental Material for Laparoscopic Nissen Versus Toupet Fundoplication for Short- and Long-Term Treatment of Gastroesophageal Reflux Disease: A Meta-Analysis and Systematic Review by Gen Li, Ning Jiang, Nuerboli Chendaer, Yingtao Hao, Weiquan Zhang, Chuanliang Peng in Surgical Innovation

Footnotes

Author Contributions

Study concept and design: Chuanliang Peng,Ning Jiang,Gen Li. Acquisition of data: Gen Li,Ning Jiang,Nuerboli Chendaer. Analysis and interpretation: Gen Li,Ning Jiang,Nuerboli Chendaer. Study supervision: Yingtao Hao,Weiquan Zhang,Chuanliang Peng.

Declaration of conflicting interests

The author(s) declared no potential conflicts of interest with respect to the research,authorship,and/or publication of this article.

Funding

The author(s) received no financial support for the research,authorship,and/or publication of this article.

ORCID iD

Chuanliang Peng

Supplemental Material

Supplemental material for this article is available online.

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