Marko Murruste, ülle Kirsim?gi, Karri Kase, Tatjana Ver?inina, Peep Talving, Urmas Lepner

Marko Murruste, ülle Kirsim?gi, Karri Kase, Tatjana Ver?inina, Urmas Lepner, Department of Surgery, Tartu University Hospital, Tartu 50406, Estonia

Marko Murruste, Karri Kase, Tatjana Ver?inina, Peep Talving, Urmas Lepner, Faculty of Medicine, University of Tartu, Tartu 50411, Estonia

Peep Talving, Division of Acute Care Surgery, Department of Surgery, North-Estonia Medical Centre, Tallinn 13419, Estonia

Abstract BACKGROUND The Partington-Rochelle pancreaticojejunostomy (PJ) is an essential management option for patients with chronic pancreatitis (CP) associated with intractable pain and a dilated pancreatic duct (PD).Wide ductotomy and long PJ (L-PJ) have been advocated as the standard of care to ensure full PD decompression.However, the role of short PJ (S-PJ) in a uniformly dilated PD has not yet been evaluated.AIM To evaluate the possible advantages and disadvantages of S-PJ and L-PJ and to interpret the perspective of S-PJ in the treatment of CP.METHODS A retrospective review of prospectively collected cohort data was conducted on surgically treated CP patients subjected to side-to-side PJ.The length of the PJ was adapted to anatomical alterations in PD.A comparison was made of S-PJ (＜ 50 mm) for uniformly dilated PD and L-PJ (50-100 mm) in the setting of multiple PD strictures, calcifications and dilatations.We hypothesized that S-PJ and L-PJ ensure comparable clinical outcomes.The primary outcomes were pain relief and quality of life (QOL); the secondary outcomes were perioperative characteristics, body weight, patients’ satisfaction with treatment, and readmission rate due to CP.RESULTS Overall, 91 patients underwent side-to-side PJ for CP, including S-PJ in 46 patients and L-PJ in 45 patients.S-PJ resulted in better perioperative outcomes: Significantly shorter operative time (107.5 min vs 134 min), lower need for intraoperative (0% vs 15.6%) and total (2.2% vs 31.1%) blood transfusions, and lower rate of perioperative complications (6.5% vs 17.8%).We noted no significant difference in pain relief, improvement in QOL, body weight gain, patients’ satisfaction with surgical treatment, or readmission rate due to CP.CONCLUSION Based on our data, in the setting of a uniformly dilated PD, S-PJ provides adequate decompression of the PD.As the clinical outcomes following S-PJ are not inferior to those of L-PJ, S-PJ should be preferred as a surgical option in the case of a uniformly dilated PD.

Key Words: Chronic pancreatitis; Surgical treatment; Pancreaticojejunostomy; Partington-Rochelle; Length of anastomosis

INTRODUCTION

Chronic pancreatitis (CP) is a benign chronic inflammatory disease of the pancreatic gland, which is characterized by irreversible morphologic changes resulting in progressive scarring and atrophy of the pancreatic tissue, ductal strictures and dilatations, calcifications, impairment of exocrine and endocrine functions, and chronic pain[1].The main indication for surgical treatment is chronic intractable pain, but in up to one third of cases pain is combined with local complications[2].Previous systematic reviews have noted that surgery remains the best option for the management of pain in these settings[3,4].Although there are several controversies in the surgical treatment of CP, the basic options are: Drainage operations, most commonly decompression of the pancreatic duct (PD) through side-to-side pancreaticojejunostomy (PJ), resection of the chronically inflamed, painful and functionally impaired pancreatic mass (‘pseudotumor’), and in some cases, a combination of these approaches[4].

The indication for decompressive PJ is enlargement of the PD without pancreatic pseudotumor[5].Various surgical drainage procedures have been employed during more than 60 years of the history of drainage operations.The Partington-Rochelle modification is the most widely used method owing to its safety and feasibility.Although there are dozens of reports on the surgical technique, morbidity, mortality and clinical effects of this modification on PJ, no comparative studies are available on the impact of the anastomotic length of PJ on the outcome of surgical treatment, especially regarding pain relief and quality of life (QOL).It has often been emphasized that the ‘standard’ Partington-Rochelle PJ has to achieve complete drainage of the Wirsung duct along the whole pancreas and has to be at least 10 cm long[6-9].However, Partington and Rochelle[10] have stated in their original paper that ‘sacculations of the PD should be opened if possible, but a uniformly dilated duct need not be opened so extensively’.Thus, the accepted ‘standard’ anastomosis and the recommendations given by Partington and Rochelle[10] are somewhat contradictory.

Since the launch of our program of surgical treatment for CP at Tartu University Hospital in 1997, we have applied the basic treatment principle of the ‘large duct disease’: The goal of PD drainage has to be full decompression of the PD.However, the ways to achieve this can be variable, since the anatomical changes in the PD are variable.Therefore, a large, even total, opening of the PD using a long PJ (L-PJ) is reasonable and wholly justified in cases of multiple PD strictures, calcifications and dilatations.However, there is a large subgroup of patients whose situation is different; instead, they have a quite homogeneously dilated PD and significant strictures or calcifications only in a single region.In these cases, effective decompression of the PD can be achieved through its limited opening in the affected region, followed by a relatively short anastomosis.Additional opening of an almost uniformly dilated PD can hardly be beneficial.

The above considerations served as the basis for defining the indications for the use of short PJ (S-PJ) or L-PJ, depending on local anatomical changes in PD.

In this study, we report comparative data regarding the two above described groups.The aim was to evaluate the possible advantages and disadvantages of S-PJ and L-PJ and to interpret the perspective of S-PJ in the treatment of CP.

MATERIALS AND METHODS

Patients

Following approval of the Research Ethics Committee of the University of Tartu, all consecutive adult patients (≥ 18 years of age) who were suffering from CP and were subjected to side-to-side PJ were reviewed within this single-center, retrospective study of prospectively collected data, comparing the outcomes following S-PJ and LPJ.

We hypothesized that S-PJ and L-PJ ensure comparable clinical outcomes.The primary outcomes were pain relief and QOL, the secondary outcomes were perioperative characteristics, body weight, patients’ satisfaction with treatment, and readmission rate due to CP.

Baseline data

Data on the patients’ demographics and co-morbidities according to Charlson’s comorbidity index[11], CP associated data, and data of pancreatic function, as well as the characteristics of pain and QOL were recorded at baseline.CP associated data included duration and etiology of CP, number of hospital admissions due to CP (from onset of chronic pain) and local changes in the pancreatic gland (PD diameter, calcifications, pseudocysts).These data were obtained from routine CT scan in all cases; further information was obtained and recorded during surgery.

For assessment of pancreatic exocrine insufficiency (PEI), we introduced a set of five simple signs (weight loss, diarrhea, steatorrhea, flatulence and foul-smelling stool) that the patients assessed in a questionnaire.PEI was defined as the presence of two or more of the above-mentioned symptoms or as the need for supplementary treatment with pancreatic enzymes.Additionally, we recorded patients’ loss of body weight during one year before surgical treatment and body mass index (BMI) as possible markers for PEI.Pancreatic endocrine function was evaluated by the presence of diabetes mellitus.

Surgical methods

Choice of the surgical method (S-PJ or L-PJ) was based on the anatomical characteristics of PD.Patients with a uniformly dilated PD and significant strictures or calcifications in only a single location of the duct were treated using S-PJ.For patients with multiple PD strictures, calcifications and dilatations, L-PJ was performed.S-PJ was defined as the anastomosis with a length of 30 up to 50 mm; in the case of L-PJ, the length of the anastomosis was 50 mm or more (up to 100 mm).

As a standardized approach, the dilated PD was opened distal to strictures or calcifications, usually in the region of the pancreatic body, after which ductotomy was extended proximally to overcome the stricture and/or to remove calcifications.The initial length of the ductotomy was usually 35-40 mm.All discovered calcifications were removed with graspers.This was followed by testing the adequacy of the drainage of the entire PD.For this, we used a 3 mm (9 Fr) metallic probe and a length of 100 mm of successful probing (proximal and distal duct together) was judged sufficient to ensure free outflow of pancreatic juice (Figure 1).If probing was successful (there were no more strictures or calcifications), a single-layer continuous PJ anastomosis with slowly absorbable suture material (4-0 polydiaxanone) was performed, involving a small portion of the transected parenchyma.

Figure 1 Two surgical options: ‘Short’ and ‘long’ ductotomy.

If probing was unsuccessful due to multiple PD strictures, initial ductotomy was extended beyond the last detected stricture.All calcifications were removed with graspers, and when necessary, additional ductotomy was carried out.The total length of L-PJ was dependent on the number and location of strictures and was somewhat variable (50 mm to 100 mm).However, the basic principle was the same: ductotomy has to be long enough to ensure complete decompression of the PD, which was tested by probing.

Data of surgical treatment

The recorded characteristics of the surgical treatment of CP were as follows: Duration of operation, intraoperative and total need for PRC (packed red cells) transfusion, morbidity, mortality and length of hospital stay.For assessment of morbidity, the Clavien-Dindo classification and comprehensive complication index (CCI) were used[12,13].

Assessment of the clinical effects of surgical treatment

We evaluated the clinical effects of the two types of PJ by comparing the preoperative and 1-year follow-up data for both groups: QOL, intensity of chronic pancreatic pain, pain-associated role limitations, changes in pain treatment, BMI, hospital admissions due to CP, and patients’ satisfaction with surgical treatment.

Data on the QOL and characteristics of pain before and after surgery were obtained from the questionnaires completed by the patients.QOL was evaluated using the RAND 36-item Short Form Health Survey (SF-36,RAND Corporation)[14].For assessment of pain, we used an 11-point numerical rating scale (NRS) ranging from 0 (no pain at all) to 10 (worst imaginable pain)[15].Pain-associated role limitations were assessed using the pain disability index (PDI).The PDI reflects the degree of interference with normal role functioning caused by chronic pain, based on an 11-point scale ranging from 0 to 10, in seven areas of activities, with a maximum score of 70[16].Complete pain relief was defined as freedom of chronic abdominal pain and absence of the need for pain medications, and partial pain relief was defined as pain reduction by 50% or more according to NRS.

To highlight the surgical effect of pain treatment, we made a comparative analysis of preoperative and 1-year follow-up use of pain medications.The patients were divided into three groups: Opioid users, users of non-opioid painkillers, and patients without the need for any pain medications.

The magnitude of the effect of surgical treatment on the exacerbations of CP requiring hospital admission was calculated as the number of admissions per patient year (PY).Preoperative PY was calculated as the period from the first admission due to CP to the time of surgery.These data were compared with the data of admissions during follow-up.

For evaluation of the patients’ satisfaction with surgical treatment, we used Likert’s five-level scale (from 1 — not satisfied at all, to 5 — very much satisfied, and from 1 — much worse, to 5 — much better, as appropriate)[17].We asked all patients to evaluate satisfaction with the results of surgical treatment in general, changes in pain characteristics after surgical treatment, and changes in QOL after surgery.

Statistical analysis

All collected data were entered in a computerized database (Microsoft Access 2016, Microsoft Inc., WA, United States).The main characteristics are presented as means with SD, or medians with the interquartile range as appropriate.Comparisons between the groups were made using the following tests: Fisher’s exact test in the case of percentages, unpairedt-test in the case of samples’ means for independent groups, pairedt-test in the case of samples’ means when the samples included the same subjects, the Mann-Whitney test in the case of medians for non-parametric unpaired data groups, and Fisher’s exact test with the 95%CI in the case of PY.The software package Statistica version 13.3 (TIBCO Software, CA, United States) was employed for statistical calculations.

RESULTS

Baseline data

Between 10/1997 and 12/2020, 91 patients underwent side-to-side PJ: S-PJ in 46 patients and L-PJ in 45 patients.

A comparison of the preoperative data in these two groups revealed some anatomical and clinical differences (Table 1).The most important anatomical characteristic of the L-PJ group was the presence of multiple strictures or calcifications in the PD: the outflow of pancreatic juice was compromised in several locations, which was decisive for carrying out L-PJ.

Patients in the L-PJ group, compared to those in the S-PJ group, were significantly younger (45.6 yearsvs52.6 years), had more previous admissions due to CP (5vs4), and had a larger main PD (8.0 mmvs6.0 mm); the proportion of disabled persons was higher (73.3%vs45.7%), as well as the proportion of patients with ≥ 2 symptoms of PEI (73.3%vs47.8%).Also, the proportion of patients with alcoholic etiology (95.6%vs82.6%) and pancreatic calcifications (77.8%vs58.7%) was higher in this group, but these differences were statistically nonsignificant.

There were no differences between the groups regarding patients’ gender, time from onset of chronic pain, endocrine insufficiency, BMI, loss of body weight or proportion of patients with pancreatic pseudocysts.Pain characteristics (NRS and PDI) did not differ between the groups before surgery (Figures 2 and 3).Approximately half of the patients required pain treatment with opioids (45.7% in the S-PJ group and 57.8% in the L-PJ group, Figure 4).The preoperative characteristics of QOL were similar for both groups (Figure 5).

Figure 2 Box plot of the intensity of pain according to the numerical rating scale (0-10) before surgery and 1 yr after surgical treatment of chronic pancreatitis.N

Figure 3 Box plot of the pain disability index (0-70) before surgery and 1 yr after surgical treatment of chronic pancreatitis.

Figure 4 Data on pain treatment before surgery and 1 yr after surgical treatment of chronic pancreatitis.

The indications for surgical treatment were chronic intractable pain in 79 cases (86.8%) and complications of CP associated with intraductal hypertension in 12 cases (13.2%).There were no differences in the indications between the groups.

Characteristics of surgery

Assessment of the surgical characteristics of PJ revealed significantly shorter operating time (107.5 minvs134.0 min), lower need for intraoperative PRC transfusion (0%vs15.6%), as well as for total PRC transfusion in the perioperative period (2.2%vs31.1%) in the S-PJ group (Table 1).

Table 1 Comparison of the short pancreaticojejunostomy and long pancreaticojejunostomy patients

In addition, morbidity was lower in the S-PJ group (6.5%vs17.8%), but this difference was statistically nonsignificant.The total number of complications was 11;most of them were mild according to the Clavien-Dindo classification (grades I-II).There were only three grade III complications: in the S-PJ group there was one case of peripancreatic fluid collection (grade IIIa), which was percutaneously drained.In the L-PJ group there were two cases of postoperative intra-abdominal hemorrhage (associated with pancreatic ductotomy) both of which required relaparotomy (grade IIIb).Use of CCI for evaluation of severity of complicated cases revealed no difference between the groups: median CCI was 26.6 for the S-PJ group and 20.9 for the L-PJ group.Perioperative mortality was zero in both groups.

There was no difference in the median length of hospital stay between the groups (8.5 d for S-PJ and 9.0 d for L-PJ).

Clinical effects of surgical treatment

All clinical effects were assessed before surgery and one year after surgery.Pain assessment revealed significant pain reduction in both study groups without differences between them.Median NRS decrease was 6 points (8 to 2) in both groups (Figure 2).Analogously, a significant decrease in the median PDI was seen in both groups, without a significant difference between them: 18.0 points (25.5 to 7.5) in the SPJ group and 27.0 points (35.0 to 8.0) in the L-PJ group (Figure 3).Complete or partial pain relief was then 84.8% and 88.9%, respectively.

Pain relief was correlated with marked changes in pain treatment: when before surgery all patients needed some kind of pain treatment, then one year after surgery almost two thirds of the patients in the S-PJ group (63.0%) and almost half of the patients in the L-PJ group (46.7%) did not need any pain treatment (Figure 4).The proportion of patients with the occasional need for opioids was 4.4% (two patients) in the S-PJ group and 11.1% (5 patients) in the L-PJ group; the difference between the groups was nonsignificant.

Figure 5 Quality of life RAND SF-36 mean scores, with 95% confidence interval, before surgery and 1 yr after surgical treatment of chronic pancreatitis.

Changes in QOL were measured using the RAND SF-36 scale.All eight assessed aspects of QOL showed significant improvement in both study groups, with the most notable positive effect regarding the impact of pain on QOL and role limitations due to emotional problems (Figure 5).

Patients’ BMI increased during the first year after surgery in most cases: 75.6% in the S-PJ group and 55.8% in the L-PJ group.However, despite the high proportion of patients with weight gain, the average increase in BMI was modest, being only 1.1 and 0.4 kg/m2, respectively.

PJ showed high effectiveness in preventing new hospital admissions due to exacerbations or complications of CP in both groups.There were 1.8 (S-PJ group) and 2.0 (LPJ group) hospital admissions because of CP per PY before surgery, which dropped to 0.1 admissions per PY in both groups after surgery.

Patients’ general satisfaction with the results of the surgical treatment of CP according to the Likert 5-point scale (1 — not satisfied at all, to 5 — very much satisfied) was very high: 4.7 in the S-PJ group and 4.9 in the L-PJ group.Changes in chronic abdominal pain were rated as much less intense, at 4.9 points compared to the baseline in both groups (1 — much more intense, to 5 — much less intense).

DISCUSSION

This retrospective study provides comparative data on aspects of the surgical treatment of CP and the clinical effects of surgery, using either S-PJ or traditional L-PJ.The S-PJ was applied in cases of an almost uniformly dilated PD and L-PJ was applied in cases with multiple ductal changes: strictures, dilatations and calcifications.According to our study, S-PJ showed better perioperative results: shorter operating time, lower need for PRC transfusion and lower rate of perioperative complications.We observed no significant difference in the clinical results regarding pain relief, improvement in QOL, weight gain, patients’ satisfaction with surgical treatment, and decrease in the rate of postoperative hospital admissions per PY due to CP.

Thus, the main outcome of our study is that for patients with a uniformly dilated PD and strictures or calcifications in a single region, S-PJ shows better operative characteristics, while the subsequent clinical effects are not inferior to those of L-PJ.

Study groups

Assessment of the preoperative data showed that our study groups were similar regarding the patients’ main complaints (intensity of pain, time from onset of pain, pain medications) and QOL.At the same time, the groups were dissimilar regarding some other important aspects.The L-PJ group was characterized by a higher rate of alcoholic CP, and the patients in this group had more admissions due to CP in the history of the disease.Several studies (Haoet al[18], Dancouret al[19], and Miyakeet al[20]) have shown that alcoholic CP is associated with a more aggressive disease course and a higher rate of complications compared to other etiologies.In support of these findings, the patients in the L-PJ group had more pronounced local changes in the pancreatic gland: multiple ductal changes (strictures, dilatations and calcifications) and a larger diameter of PD.

Length of the PJ anastomosis

According to the predominant statement, ‘standard’ PJ necessitates the full-length anastomosis with total opening of the PD.Indeed, the obvious advantage of this approach is easy clearance of the entire PD of calcifications and full decompression of the duct[21,22].However, variable suggestions concerning the length of PJ have been proposed.Bradley[23] stated in his review, that the length of the PJ should be at least 6 cm to gain long-term success in pain treatment; Yeoet al[24] reported having attempted to obtain a minimum of 8 cm ductotomy; Prinzet al[25] suggested that ductotomy should be carried out to within 1 cm of the ampulla of Vater and to within 1 cm of the tip of the pancreatic tail on the left side[23-25].Regarding the extent of ductotomy, the pioneers of the method, Partington and Rochelle[10], stated in 1960: ‘uniformly dilated duct need not be opened extensively’, ‘PD split should continue somewhat right to mesenteric vessels’ and ‘it is rarely necessary to split distal portion in the tail’[10].Some authors admit that the extent of the ductal incision does not have a fixed length; rather, ductotomy has to ensure full PD decompression.Thus, instead of the widely accepted ‘standard’, there exist slightly different practices and up to the present no comparative data have been available on the effectiveness of the shorter or longer PJ.

Despite the obvious advantages, total ductotomy has also some disadvantages and surgical risks.Unroofing of the PD is especially challenging in the region of the pancreatic head: The gastroduodenal artery (GDA) is usually located in the proximal 1.5-3 cm of the pancreatic head and has to be suture ligated superiorly and inferiorly in front of the ductotomy (Figure 1).Nevertheless, despite ligation of the GDA, the pancreatic head is still very well vascularized and ductotomy in this region is associated with a considerable risk of bleeding.Therefore, some surgeons have suggested performing partial resection of the pancreatic head in this situation (as described by Frey) as a less risky procedure compared to ductotomy[26,27].

One of the options to avoid wide ductotomy is to replace it with intraoperative instrumental exploration of the PD.We used intraoperative probing and in case we found additional calcifications or strictures, further ductotomy was performed.An alternative would be endoscopic visualization of the PD, which has been pioneered mainly by laparoscopic surgeons.Kurian and Gagner[28] used a choledochoscope for visualization of PD and Fogarty catheters for ductal clearance of calcifications; Tantiaet al[29] used a 30° laparoscope to visualize the lumen of the PD and cleared the unopened part of the pancreatic head of calcifications using graspers — a procedure which the authors called ‘pancreaticodochoscopy’.Bhandarwaret al[30] suggested using a 5 mm zero-degree laparoscope to confirm ductal clearance beyond the ductotomy, while Sahoo and Kumar[31] used a cystoscope for this purpose[30,31].

The value of ductotomy in the region of the pancreatic tail is also debatable: in the splenic hilum PD is not well accessible and is narrowing anyway, so the effect of the extensive distal PD incision (up to within 1 cm of the tip of the pancreatic tail) for allowing better pancreatic juice drainage can be quite modest.Considering the above mentioned aspects, several surgeons have abandoned opening the PD in the region of the pancreatic tail (e.g., Sahoo and Kumar[31], Ceppa and Pappas[32]) and have replaced it with intraoperative exploration of the PD.

According to our study, avoiding total ductotomy provided significant benefits in terms of operating time, need for PRC transfusion, and morbidity.However, the rate of severe complications was low in both groups: only two patients in the L-PJ group needed relaparotomy due to postoperative hemorrhage, both cases being due to ductotomy in the region of the pancreatic head.

The clinical effects of the two types of PJ were evaluated one year after surgery.Both surgical options, S-PJ in the treatment of patients with a uniformly dilated PD and L-PJ in the treatment of patients with multiple ductal changes (strictures, dilatations and calcifications), were effective in resolving the main clinical problems without significant differences in the results.

The proportion of patients with pain relief was comparable to that reported in previous studies (D’Haeseet al[33], Tianet al[34]).Interestingly, despite the fact that 4.4% (S-PJ) and 11.1% (L-PJ) of the patients occasionally used opioids, they rated (according to the Likert 5-point scale) abdominal pain as much less intense compared to the baseline.Some patients reported that ‘they were used to take opioids even in the case of mild pain because of effectiveness of this medication’.Patients’ general satisfaction with the results of the surgical treatment of CP was high, being on average 4.7 in the S-PJ group and 4.9 in the L-PJ group (Likert scale).

Significant improvement in QOL was evident in all eight aspects of the SF-36 tool.The most marked changes were seen in pain associated QOL and in role limitations because of emotional problems.The importance of pain in predicting QOL is well known[35].Hence, a greater than 30-point improvement in pain associated QOL was to be expected.

One of the anticipated effects of the surgical treatment of CP is prevention of new admissions due to pain and exacerbations or complications of CP[10,36].In this study, the effectiveness of surgical treatment in preventing new admissions was higher than 95%: there were 1.8 (in the S-PJ group) and 2.0 (in the L-PJ group) hospital admissions because of CP per PY before surgery; after surgery this indicator dropped to 0.1 admissions per PY in both groups.This effect cannot be underestimated, as it translates into a decrease of the health care burden for patients with CP.Hallet al[37] found in their systematic review that most treatment costs for patients with CP are associated with pain management.Hence effective surgical pain treatment leads to a considerable economic effect.

Limitations

This study has some limitations.Firstly, as the choice of the surgical method was based on the anatomical characteristics of the PD, the study groups were dissimilar.Secondly, lack of randomization: it would be important to randomly compare patients with a uniformly dilated PD, using either S-PJ or L-PJ.Thirdly, as surgeons specialized in pancreatic surgery operated on all enrolled patients, the obtained results (zero mortality and relatively low morbidity) may not be generalizable to outcomes at hospitals that have less expertise.It has been shown that centralization of pancreatic surgery is important and its beneficial effect is associated in particular with better short-term results after surgery[38].

CONCLUSION

Based on our data, in the setting of a uniformly dilated PD, S-PJ provides adequate decompression of PD.As the clinical outcomes following S-PJ are not inferior to those of L-PJ, S-PJ should be preferred as a surgical option in the case of a uniformly dilated PD.

ARTICLE HIGHLIGHTS

Research background

The Partington-Rochelle pancreaticojejunostomy (PJ) is an essential management option in patients with chronic pancreatitis (CP) associated with intractable pain and a dilated pancreatic duct (PD).Wide ductotomy and long PJ (L-PJ) have been advocated as the standard of care to ensure full PD decompression.Nevertheless, the role of short PJ (S-PJ) in uniformly dilated PD has not yet been evaluated.

Research motivation

The aim of this study was to evaluate the possible advantages and disadvantages of SPJ and L-PJ and to interpret the perspective of S-PJ in the treatment of CP.

Research objectives

We hypothesized that S-PJ and L-PJ ensure comparable clinical outcomes.The primary outcomes were pain relief and quality of life, secondary outcomes were perioperative characteristics, body weight, patients’ satisfaction with treatment, and readmissions rate due to CP.

Research methods

A retrospective review of prospectively collected cohort data was conducted on surgically treated CP patients subjected to side-to-side PJ.The length of PJ adapted to anatomical alterations in PD: A S-PJ (＜ 50 mm) in uniformly dilated PD, and a L-PJ (50-100 mm), in the setting of multiple PD strictures, calcifications and dilatation were compared.

Research results

S-PJ resulted in improved perioperative outcomes: significantly shorter operative time (107.5 minvs134 min), lower need for intraoperative (0%vs15.6%) and total (2.2%vs31.1%) blood transfusions, and lower rate of perioperative complications (6.5%vs17.8%).We noted no significant difference in pain relief, improvement in quality of life, body weight gain, patients’ satisfaction with surgical treatment, and readmission rate due to CP.

Research conclusions

Based on our data, in the setting of a uniformly dilated PD, the S-PJ provides adequate decompression of the PD.As the clinical outcomes following S-PJ are not inferior to those of L-PJ, S-PJ should be preferred as a surgical option in a uniformly dilated PD.

Research perspectives

It would be important to compare randomly selected patients with uniformly dilated PD using either S-PJ or L-PJ.