Stapled haemorrhoidectomy compared with Milligan-Morgan excision for the treatment of prolapsing haemorrhoids: a prospective study

A systematic review of the literature assessing the outcomes of stapled haemorrhoidopexy versus open haemorrhoidectomy

Background

Symptomatic haemorrhoids affect a large number of patients throughout the world. The aim of this systematic review was to compare the surgical outcomes of stapled haemorrhoidopexy (SH) versus open haemorrhoidectomy (OH) over a 20-year period.

Methods

Randomized controlled trials published between January 1998 and January 2019 were extracted from Pubmed using defined search criteria. Study characteristics and outcomes in the form of short-term and long-term complications of the two techniques were analyzed. Any changes in trend of outcomes over time were assessed by comparing article groups 1998–2008 and 2009–2019.

Results

Twenty-nine and 9 relevant articles were extracted for the 1998–2008 (period 1) and 2009–2019 (period 2) cohorts, respectively. Over the two time periods, SH was found to be a safe procedure, associated with statistically reduced operative time (in 13/21 studies during period 1 and in 3/8 studies during period 2), statistically less intraoperative bleeding (3/7 studies in period 1 and 1/1 study in period 2) and consistently less early postoperative pain on the visual analogue scale (12/15 studies in period 1 and 4/5 studies in period 2) resulting in shorter hospital stay (12/20 studies in period 1 and 2/2 studies in period 2) at the expense of a higher cost. In the longer term, although chronic pain in SH and OH patents is comparable, patient satisfaction with SH may decline with time and at 2-year follow-up OH appeared to be associated with greater patient satisfaction.

Conclusions

SH appears to be safe with potential advantages, at least in the short term, but the evidence is lacking at the moment to suggest its routine use in clinical practice.

Doppler-Guided Transanal Hemorrhoidal Dearterialization (DG-THD) Versus Stapled Hemorrhoidopexy (SH) in the Treatment of Third-Degree Hemorrhoids: Clinical Results at Short and Long-Term Follow-Up

INTRODUCTION

The stapled hemorrhoidopexy (SH) and the Doppler-guided transanal hemorrhoidal dearterialization (DG-THD) are minimally invasive procedures for the surgical treatment of hemorrhoids. This study aims to verify the efficacy of the DG-THD versus the SH in the treatment of third-degree hemorrhoids.

METHOD

One hundred consecutive patients were causally allocated to either procedure, obtaining two groups of 50 pts. A clinical examination was performed at 3, 7, 15, and 30 days after the operation. Quality of life, anal symptoms, recurrence of hemorrhoids, and reoperation were assessed by means of a questionnaire and of a clinical examination at long-term follow-up (7.0 year average).

RESULTS

At short-term follow-up, the median postoperative pain score was significantly lower in DG-THD group compared to SH group, (V.A.S 2 vs 6; t = 2.65, p < 0.01). The morbidity rate and the return to normal life and work were similar after the two procedures. At long-term follow-up, the incidence of piles was not statistically different between the two groups (DG-THD 10.0 %; SH 14.0 %). No differences were reported by patients in terms of satisfaction for surgery.

CONCLUSION

SH and DG-THD procedures do not show significantly different results with regard to the patients outcome. However, considering the lower p. o. pain, the DG-THD might be proposed as the first line treatment in third-degree hemorrhoids.

Long-Term Functional Outcome After Stapled and Excisional Hemorrhoidectomy

Stapled hemorrhoidectomy (SH) as described by Longo is a recently added option for hemorrhoid surgery. Interest in SH has been principally driven by the fact that conventional excision hemorrhoidectomy (EH) has been an extremely painful procedure because it involves excision of hemorrhoidal tissue along the extremely sensitive anoderm. SH, on the other hand, has been shown to be associated with decreased postoperative pain because it does not involve the sensate anal mucosa below the dentate line. To date there have been many randomized controlled studies comparing circular SH with traditional excision techniques. Despite proven early postoperative advantages for SH, the long-term benefits and effect on patient quality of life (QOL) compared with EH still remain to be debated. This study aimed to evaluate long-term patient outcomes via a validated health-related QOL survey. QOL measures were satisfactory in both groups across all subscales of physical health summary measures and mental health summary measures. This coincided with Wexner continence scores, which were also satisfactory, with a median of 0 in both groups. QOL, continence scores, and long-term symptom follow-up are similar in patients who undergo SH or EH.

Short- and long-term results of harmonic scalpel hemorrhoidectomy versus stapler hemorrhoidopexy in treatment of hemorrhoidal disease

PURPOSE

In this prospective randomized study, our aim is to compare the short- and long-term results of harmonic scalpel hemorrhoidectomy (HSH) and stapler hemorrhoidopexy (SH) methods in the surgical treatment of Grade III and Grade IV hemorrhoidal disease.

METHODS

Ninety-nine consecutive patients diagnosed with Grade III or Grade IV internal hemorrhoidal disease were included in the study. Patients were randomized to HSH (n = 48) or SH (n = 51) treatments. Data on patient demographic and clinical characteristics, operative details, postoperative pain score on a visual analog scale, additional analgesic requirement, postoperative short- and long-term complications, and recurrence of hemorrhoidal disease were also recorded. Patients were regularly followed for a total period of 24 (6-36) months.

RESULTS

The patient demographic and clinical characteristics were similar in the two groups. The operative time was significantly shorter in the HSH group compared with the SH group. Overall pain scores were not significantly different between the groups, although severe pain was significantly more common in the HSH group. Recurrence was significantly lower in the HSH group compared with the SH group.

CONCLUSION

HSH and SH are both safe and effective methods for surgical treatment of Grade III and Grade IV hemorrhoidal disease. In our study, the HSH method was determined to be safer, easier, and faster to perform, and associated with fewer long-term recurrences than the SH method.

The role of hemorrhoidopexy in the management of 3rd degree hemorrhoids

INTRODUCTION

Hemorrhoidopathy is a very common benign surgical pathology. Hemorrhoids are divided into 4 stages, depending on symptoms and degree of prolapse. Hemorrhoidopexy is a technique developed for the treatment of 3rd degree hemorrhoids, but its application has been extended to the treatment of 4th degree hemorrhoids as well. Nevertheless, recent studies identify weaknesses of the PPH in the treatment of 4th degree hemorrhoids.

PATIENTS

One hundred and twenty-six consecutive patients with 3rd degree hemorrhoids underwent stapled hemorrhoidopexy. All procedures were performed under general anesthesia with the patient in lithotomy position. A phosphate enema was given to the patient 2 h before the procedure, and cephalosporine and metronidazole were administered at anesthesia induction. Most patients were discharged the day after the operation. All patients were reassessed at 1, 6 weeks, 6 and 12 months after the procedure.

RESULTS

The mean operating time was 16.3 min. Of all patients, 5.8% complained of mild rectal pain for a post-operative period of 5-12 days, 5.8% developed post-operative urinary retention, managed with catheterization, 13.3% experienced fecal urgency while 5.8% experienced gas incontinence, which subsided 2-8 weeks from surgery. The mean hospital stay was 1.2 days. Most patients returned to daily activities within 2-5 days. Ninety-five percent of patients returned for their follow-up visits. Recurrence of the disease occurred in 8 patients (6.6%). It was managed conservatively in 2 patients, 3 underwent redo hemorrhoidopexy and 3 underwent classic hemorrhoidectomy.

CONCLUSION

According to our results, stapled hemorrhoidopexy seems to be a safe, pain-free and, in the long-term, effective technique for the treatment of 3rd degree hemorrhoids.

Our criteria for PPH procedure in one day surgery practice

Background

The aim of this report is to analyse our results and to underline our criteria for day surgery practice.

Patients and methods

Our patients are selected according to ASA criteria. Occasionally, the patients with some risk factors are selected but only when their concomitant diseases are well controlled.

Results

We have treated 673 patients with the third and early fourth degree haemorrhoids. We have had patients with several minor problems causing no influence on the success of the procedure. Good haemostasis, preventing postoperative bleeding, is the most important factor.

Conclusion

Among proctological procedures in haemorrhoid treatment, the PPH technique has firm and well-accepted position even in ambulatory surgery.

New approach to large haemorrhoidal prolapse: double stapled haemorrhoidopexy

PURPOSE

To verify if in large haemorrhoidal prolapse (independently from the degree) in patients with no symptoms of obstructed defaecation syndrome, the use of a stapled hemorrhoidopexy variant, comprising a double stapler haemorrhoidopexy (DSH), makes it possible to reduce the percentage of failures or relapses and to standardise an objective intraoperative parameter for the purpose of quantifying internal prolapses which can then be used as a guide in determining the type of treatment to be provided.

METHODS

Between June 2003 and June 2004, 353 patients were treated for haemorrhoidal prolapse. The patients suffering from large haemorrhoidal prolapse occupying more than half of the length of the anal dilator were intraoperatively selected for DSH.

RESULTS

Eighty-three patients (23.5%) underwent a DSH. The degrees of the large haemorrhoidal prolapse intraoperatively selected for DSH were sub-divided as follows: 7.2% (second), 24% (third) and 68.6% (fourth). The follow-up period was 48 months. There were three cases (3.6%) of residual illnesses and five cases (6%) of a relapse. The following complications were recorded: urgency at <3 months (7.2%), haemostasis revisions (2.4%) and spontaneously draining anterior haematoma (1.2%). The results of the 270 haemorrhoidal prolapse (38 second degree, 159 third degree and 130 fourth degree) treated with the procedure for prolapse and haemorrhoids were: nine (3.3%) residual illness and 12 (4.44%) relapse illness. The following complications were recorded: urgency at <3 months (6.6%), haemostasis revisions (2.5%) and spontaneously draining anterior haematoma (0.7%).

CONCLUSIONS

The intraoperative selection criterion was both efficacious and reproducible. This variant technique, which can be used in large haemorrhoidal prolapses, could allow us to further improve the quality of treatment for haemorrhoidal conditions using stapled haemorrhoidopexy, without increasing the complications.

Modified Longo's stapled hemorrhoidopexy with additional traction sutures for the treatment of residual prolapsed piles

PURPOSE

Residual prolapsed piles is a problem after the stapled hemorrhoidopexy, especially in large third- or fourth-degree hemorrhoids. We have developed a method using additional traction sutures along with modified Longo's procedure to manage this problem.

MATERIALS AND METHODS

From January 2005 to October 2005, 30 consecutive patients with symptomatic third- or fourth-degree hemorrhoids who underwent the modified Longo's stapled hemorrhoidopexy with additional traction sutures in a single institution were collected. The demographics, postoperative pain score, surgical features, outcomes, and early and late complications were recorded. All patients were followed for a mean duration of 8.8 (range, 4-15) months.

RESULTS

Thirty patients (17 males) with a mean age of 45 (range, 27-63) years were identified. The mean postoperative pain score on the morning of the first postoperative day was 2.8 (range, 1-4). The mean duration of operation was 30.7 (range, 25-37) min. The mean duration of hospital stay was 2 (range, 1-3) days. The mean days for patients to resume normal work was 6.7 (range, 4-9) days. No other procedure-related complications occurred in all patients. There was no early complication except for fecal urgency found in one patient during the first postoperative days. Regarding the late complications, no residual prolapsed piles, persistent anal pain, incontinence, anal stenosis, or recurrent symptoms were found.

CONCLUSIONS

Our preliminary experiences indicated that this modified procedures truly contributed to reduce the residual internal hemorrhoids and maintained the benefits of stapled hemorrhoidopexy. Randomized trial and long-term follow-up warrant to determine possible surgical and functional outcome.

Stapled hemorrhoidopexy: a prospective study from pathology to clinical outcome

Stapled hemorrhoidopexy is widely accepted to treat hemorrhoids, but serious complications have been reported. In this prospective audit, we correlated clinical outcome with pathological findings. From January 2003 to April 2007, 94 patients underwent hemorrhoidopexy. Macroscopic appearance of the specimen (shape, size, and depth) was recorded. Microscopically, the presence of columnar, transitional, and squamous epithelium, the involvement of circular/longitudinal smooth muscle, and features of mucosal prolapse were assessed. Clinical outcome was evaluated by a validated questionnaire. Postoperative pain, secretion, and bleeding durations were 12.7+/-10.6, 5.6+/-9.6, and 6.3+/-8.4 days. Patient's return to work averaged 16.7+/-10.7 days. Fissure, skin tags, and anal strictures were observed in 23.4%. Seven patients experienced pain for a significantly longer period of time. All specimens contained columnar mucosa, but 29.8% contained columnar and transitional epithelium and 12.8% contained columnar, anal transitional, and stratified squamous epithelium. Smooth muscle was observed in 62.7%. Pain was significantly increased if transitional epithelium was present in the specimen. No correlation or differences were observed if smooth muscle was present, although postoperative bleeding was more frequent. Hemorrhoidopexy is safe and effective. The specimen should always be sent for pathology examination. Only columnar epithelium should be present and, although the presence of smooth muscle does not influence the outcome in terms of functional results, its presence may play a role in postoperative bleeding.

Long-term outcome of a multicentre randomized clinical trial of stapled haemorrhoidopexy versus Milligan-Morgan haemorrhoidectomy

INTRODUCTION

Stapled haemorrhoidopexy is less painful than Milligan-Morgan haemorrhoidectomy, allowing an earlier return to working activities, but its long-term efficacy is not fully established. This study reports the long-term follow-up of a randomized clinical trial comparing the two techniques in 100 patients affected by third- and fourth-degree haemorrhoids.

METHODS

All patients were contacted and invited to attend the clinic to assess long-term functional outcome. The degree of continence and satisfaction were assessed by questionnaire. Anal manometry and anoscopy were performed.

RESULTS

Eighty patients were available after a median follow-up of 87 months. No statistically significant differences were found between the two groups in terms of incontinence, stenosis, pain, bleeding, residual skin tags or recurrent prolapse. A tendency towards a higher recurrence rate was reported in patients with fourth-degree haemorrhoids, irrespective of the technique used. No significant changes in anal manometric values were found after surgery in either group.

CONCLUSION

Both techniques are effective in the long term.

Day case haemorrhoidectomy

OBJECTIVE

Day case haemorrhoidectomy in a District General Hospital. We have investigated the uptake and outcome of day case haemorrhoidectomy in a small district general hospital.

METHOD

Case note review with completion of standard proforma for all patients undergoing haemorrhoidectomy as day case (same day admission and discharge) or inpatient over a 4-year period.

RESULTS

Sixty patients underwent day case closed haemorrhoidectomy, 2 day case stapled haemorrhoidectomy and 1 day case open haemorrhoidectomy, whilst 18 patients were treated as in-patients. One patient required re-admission within 31 days for reactionary haemorrhage after day case surgery. None suffered acute urinary retention. Concomitant medical disease or emergency admission were the only reasons for exclusion from day case haemorrhoidectomy. Of the 18 patients treated as in-patients haemorrhoidectomy two had unplanned readmission.

CONCLUSION

Closed haemorrhoidectomy with same day discharge should be offered to all patients that require surgical treatment of haemorrhoids and do not have other contra-indications to day case surgery.

[The surgical treatment of hemorrhoids]

Surgery is the most effective treatment in patients with symptomatic grade III-IV hemorrhoids who have not responded to outpatient treatment, when there is associated abnormalities (anal fissure, anal fistula, skin tags) and in thrombosed hemorrhoids. Hemorrhoidectomy is currently the "gold standard" treatment. Randomized controlled trials comparing open with closed hemorrhoidectomy show no significant differences in pain scores. Stapled hemorrhoidectomy produces less postoperative pain than hemorrhoidectomy but is less effective in terms of symptom control. No treatment is superior to others in reducing postoperative pain except the use of drugs and anesthetic techniques. In patients with prolapsed internal hemorrhoids and thrombosed hemorrhoids, treatment may initially consist of an urgent hemorrhoidectomy with the same results as those obtained with elective surgery.

Systematic review on the procedure for prolapse and hemorrhoids (stapled hemorrhoidopexy)

PURPOSE

The procedure for prolapse and hemorrhoids (stapled hemorrhoidopexy) has been introduced as an alternative to conventional hemorrhoidectomy. This is a systematic review on stapled hemorrhoidopexy of all randomized, controlled trials that have been published until August 2006.

METHODS

All published, randomized, controlled trials comparing stapled hemorrhoidopexy to conventional hemorrhoidectomy were identified from Ovid MEDLINE, EMBASE, CINAHL, and all Evidence-Based Medicine Reviews (Cochrane Central Register of Controlled Trial, Cochrane Database of Systemic Review, and Database of Abstracts of Reviews of Effects) between January 1991 and August 2006. Meta-analysis was performed by using the Forest plot review if feasible.

RESULTS

A total of 25 randomized, controlled trials with 1,918 procedures were reviewed. The follow-up duration was from 1 to 62 months. Stapled hemorrhoidopexy was associated with less operating time (weighted mean difference, -11.35 minutes; P = 0.006), earlier return of bowel function (weighted mean difference -9.91 hours; P < 0.00001), and shorter hospital stay (weighted mean difference, -1.07 days; P = 0.0004). There was less pain after stapled hemorrhoidopexy, as evidenced by lower pain scores at rest and on defecation and 37.6 percent reduction in analgesic requirement. The stapled hemorrhoidopexy allowed a faster functional recovery with shorter time off work (weighted mean difference, -8.45 days; P < 0.00001), earlier return to normal activities (weighted mean difference, -15.85 days; P = 0.03), and better wound healing (odds ratio, 0.1; P = 0.0006). The patients' satisfaction was significantly higher with stapled hemorrhoidopexy than conventional hemorrhoidectomy (odds ratio, 2.33; P = 0.003). Although there was increase in the recurrence of hemorrhoids at one year or more after stapled procedure (5.7 vs. 1 percent; odds ratio, 3.48; P = 0.02), the overall incidence of recurrent hemorrhoidal symptoms--early (fewer than 6 months; stapled vs. conventional: 24.8 vs. 31.7 percent; P = 0.08) or late (1 year or more) recurrence rate (stapled vs. conventional: 25.3 vs. 18.7 percent; P = 0.07)--was similar. The overall complication rate did not differ significantly from that of conventional procedure (stapled vs. conventional: 20.2 vs. 25.2 percent; P = 0.06). Compared with conventional surgery, stapled hemorrhoidopexy has less postoperative bleeding (odds ratio, 0.52; P = 0.001), wound complication (odds ratio, 0.05; P = 0.005), constipation (odds ratio, 0.45; P = 0.02), and pruritus (odds ratio, 0.19; P = 0.02). The overall need of surgical (odds ratio, 1.27; P = 0.4) and nonsurgical (odds ratio, 1.07; P = 0.82) reintervention after the two procedures was similar.

CONCLUSIONS

The Procedure for Prolapse and Hemorrhoid (stapled hemorrhoidopexy) is safe with many short-term benefits. The long-term results are similar to conventional procedure.

Long-term results after stapled haemorrhoidopexy for fourth-degree haemorrhoids: a prospective study with median follow-up of 6 years

BACKGROUND

The aim of our study was to assess our early and long-term results after stapled haemorrhoidopexy for fourth-degree haemorrhoids.

METHODS

Our study covers the time period from 1998 to 2002 and consists of 56 consecutive patients (33 men) with fourthdegree haemorrhoids who underwent stapled haemorrhoidopexy.

RESULTS

During the postoperative period, 6 patients (10.7%) experienced pain for 7-14 days, which was treated with oral analgesia. Ten patients (17.8%) experienced gas incontinence and two of them also reported soiling. The incontinence subsided within 3-8 weeks. Median follow-up was 72.1 months (range, 55-86 months). Recurrence of the haemorrhoidal disease occurred in 33 patients (58.9%). The overall reintervention rate was 42.8%, as 24 patients required excisional haemorrhoidectomy by the Milligan-Morgan technique at a later stage.

CONCLUSIONS

Stapled haemorrhoidopexy seems to be a safe, low-pain but ineffective technique for the treatment of fourth-degree haemorrhoids, as it is accompanied by high recurrence and reintervention rates in the long term.

A prospective evaluation of stapled haemorrhoidopexy/rectal mucosectomy in the management of 3rd and 4th degree haemorrhoids

OBJECTIVE

We have audited our 5 years experience of circumferential-stapled haemorrhoidopexy (PPH).

METHOD

A prospectively collected electronic data base of our 5-year experience to September 2005 has been examined.

RESULTS

A total of 357 consecutive patients (220 - 62% women, median age 46 years; range 28-92) with symptomatic third- and fourth-degree haemorrhoids (ratio 222:135) have undergone a stapled haemorrhoidopexy/rectal mucosectomy. One hundred and thirty-two (37%) had failed previous banding; 42 (12%) had undergone a Milligan-Morgan haemorrhoidectomy in the past. All but one was performed under general anaesthetic. Mean duration of surgery was 15 min (range 11-40); 299 (84%) were planned day cases (three patients were admitted overnight for pain relief (2) and retention of urine) and 57 were planned successful overnight stays. Reactive postoperative bleeding requiring a blood transfusion occurred in three patients (0.8%): one returned to theatre (0.2%). Three patients (0.8%) had a secondary haemorrhage requiring a hospital visit, one was admitted overnight. Four patients complaining of severe pain were managed in the community. Transient urgency was reported in 92 patients (26%); 58 (63%) were men, faecal impaction 4 (1.1%), minor staple line stenosis requiring dilatation 5 (1.4%), peri-anal sepsis from an associated untreated chronic anal fissure 1 (0.2%). Normal work was resumed between 3 and 31 days (median 7). Five patients re-presented with recurrent symptoms between 14 & 18 months: further treatment comprised a repeat PPH in three (one was very painful), banding 1 and reassurance alone. A further patient re-presented with minor soiling which responded to physiotherapy.

CONCLUSION

Stapled haemorrhoidopexy/rectal mucosectomy is a safe, effective and predictable treatment of third- and fourth- degree haemorrhoids and in the majority of patients can be carried out on a day case basis.

Stapled haemorrhoidopexy for haemorrhoids in combination with lateral internal sphincterotomy for fissure-in-ano

The aim of this prospective study is to describe the combined technique and results of stapled haemorrhoidopexy and lateral internal sphincterotomy for patients suffering from prolapsing 3rd-degree haemorrhoids and chronic fissure-in-ano. During the period from 1999 to 2004, 26 patients underwent combined surgical treatment for anal fissure and prolapsing symptomatic haemorrhoids. Preoperative and postoperative clinical evaluation and the patient's degree of satisfaction were recorded. Early complications included faecal urgency (3 patients) and pain (2 patients). Complete continence was restored within 10 weeks in all patients except 1 who had persisting incontinence to flatus. All fissures healed completely within 4 weeks. No haemorrhoidal or fissure recurrence has been observed during follow-up. The combination of stapled haemorrhoidopexy and lateral internal sphincterotomy is a safe and effective procedure for the treatment of prolapsing 3rd-degree haemorrhoids and chronic anal fissures.

Stapled hemorrhoidopexy vs. diathermy excision for fourth-degree hemorrhoids: a randomized, clinical trial and review of the literature

PURPOSE

The aim of this prospective study was to compare the results of stapled hemorrhoidopexy with those of conventional diathermy excision for controlling symptoms in patients with fourth-degree hemorrhoids.

METHODS

Thirty-one patients with symptomatic, prolapsed irreducible piles were randomized to either stapled hemorrhoidopexy (n = 15) or diathermy excision (n = 16). The primary outcome measure was the control of hemorrhoidal symptoms one year after operation.

RESULTS

The two procedures were comparable in terms of pain relief and disappearance of bleeding. Recurrent prolapse starting from the fourth month after operation was confirmed in 8 of 15 patients in the stapled group and in none in the diathermy excision group: two-tailed Fisher's exact test P = 0.002, RR 0.33, 95 percent confidence interval 0.19-0.59). Five of these patients responded well to a later conventional diathermy hemorrhoidectomy. Persistence of itching was reported in six patients in the stapled group and in one of the diathermy excision group (P = 0.03). On the other hand, six patients in the stapled group and none in the diathermy excision group experienced tenesmus (P = 0.007).

CONCLUSIONS

Stapled hemorrhoidopexy was not effective as a definitive cure for the symptoms of prolapse and itching in patients with fourth-degree hemorrhoids. Moreover, stapled hemorrhoidopexy induced the appearance of a new symptom, tenesmus, in 40 percent of the patients. Therefore conventional diathermy hemorrhoidectomy should continue to be recommended in patients with symptomatic, prolapsed, irreducible piles.

Proctology in day surgery: surgical technique

In 2002 the law number 112 defined in Italy the Elementary Assistance Levels (Livelli Essenziali di Assistenza--L.E.A.), which are the medical procedures provided to all Italian citizens by the National Health System (Servizio Sanitario Nazionale), for free or after payment of a small fee. Each Italian Regional Government has to define for each pathology (as already categorized in Disease Related Groups--D.R.G.) a benchmark, which is the percentage of cases of each pathology which should be treated in Day Surgery. The benchmarks are thresholds that should not be exceeded to avoid fines or other penalties to the hospital. In order to meet the objectives required by Italian law, a Day Surgery Unit must be able to perform as many operations as possible with high quality, high effectiveness, high efficiency, low costs and a low percentage of complications ("zero defect" objective). To get as close as possible to this objective it is necessary to seek the best organisation and the best surgical technique.