Intestinal retractor for transperitoneal laparoscopic aortoiliac reconstruction: experimental study on human cadavers and initial clinical experience

Stapled Aortic Anastomoses: A Minimally Invasive, Feasible Alternative to Videoscopic Aortic Suturing?

Widespread applications of totally laparoscopic aortic reconstructions have been limited by the long cross-clamp time required to suture the aortic anastomosis despite improvement in instrumentation. The authors' hypothesis was that a “one-step anastomosis concept” using an intraluminal stapler would allow shorter cross-clamp time but similar patency and imperviousness as videoscopic suturing techniques. An intraluminal stapler (Endopath-ILS, Ethicon) with a modified anvil was used to perform videoscopic-assisted thoracic aorta-to-iliac artery bypass with a 21 mm by 8 mm polytetrafluoroethylene (PTFE) graft in 22 sheep through a minimally invasive approach using a 5 cm thoracotomy. The graft-to-iliac artery anastomoses were hand sutured through a flank incision. Twelve sheep were used to establish the technique and 10 subsequent animals constituted the study group. Aortic cross-clamp time, imperviousness, and need for additional sutures were recorded and compared to previously reported data using videoscopic suturing in pigs. Patency was assessed by comparing lower limb arterial pressures. Macroscopic and microscopic examinations of the anastomoses were performed at different time-points within the first 3 months. Videoscopic-assisted stapled anastomoses were also performed on atherosclerotic aortas of 3 human cadavers. Stapled anastomoses between the thoracic aorta and PTFE graft were completed in 8 of 10 animals. Two animals were euthanized after stapler failure and anastomotic bleeding. Sutures to strengthen the anastomosis had to be used in 4 cases. Mean aortic cross-clamp time in 8 successful cases was 4.3 ±2.9 minutes (range 2–11 minutes) and was significantly shorter than clamp time of videoscopic suturing technique (48.7 ±9.4 minutes, p<0.0001). Imperviousness was good or excellent in 4 animals and fair in 4 animals. All anastomoses were patent at the end of the procedure. Examination of the anastomosis of the 2 failed interventions showed medial aortic tear surrounding the anastomosis in 1 case and misfired staples in the other. No graft occlusion was noted during follow-up ranging from 0 to 12 weeks. At the time of harvest, no bleeding was noted after epinephrine and volume infusion to increase mean arterial pressure to 200 mm Hg for 15 minutes. Macroscopic examination of the anastomoses revealed adequate healing with circumferential stapling of the prosthesis to the aortic wall and no stenosis or thrombus except in 1 false aneurysm (1/7, 14%). Surface electron microscopy showed cells coverage of the anastomosis surface. When applied on human cadaver thoracic and abdominal aorta with atherosclerotic changes, clamping times of less than 5 minutes were achieved. However, imperviousness tested with saline was poor. An automatic stapling device allows performance of a graft-to-aorta anastomosis through a minimally invasive approach with shorter clamping time than a videoscopic suturing technique. However, the current technique of aortic stapling is unreliable and further improvements are needed.

Three trocars laparoscopic abdominal aortic aneurysm repair

Total laparoscopic abdominal aortic aneurysm resection with tube graft interposition was performed in a 53-year-old woman diagnosed with an infrarenal abdominal aortic aneurysm. The operation was accomplished by a method using three trocars. The operation took 240 minutes. Blood loss was 600 mL. No complications occurred in 13 months of postoperative follow-up. These results show that total laparoscopic abdominal aortic aneurysm repair with three trocars is feasible and worthwhile.

Laparoscopic surgery in the management of complex aortic disease: techniques and lessons learned

Laparoscopic vascular surgery must be assessed in the context of both open and endovascular interventions. The development of improved laparoscopic equipment and endoscopic techniques makes performance of laparoscopy easier, but endovascular interventions still hold wide appeal because they are minimally invasive and are easier to master by vascular surgeons. Despite decreased morbidity and recovery time, endovascular interventions have inferior durability and higher reintervention rates when compared with open aortoiliac interventions. In particular, after endovascular aneurysm repair, patients need lifelong surveillance because there is potential for delayed endoleaks, aortic neck dilatation, graft migration, and ongoing risk of aneurysmal rupture. These limitations of endovascular therapy are the impetus behind the pursuit of other minimally invasive techniques, such as laparoscopy, in vascular surgery. Currently, two evolving laparoscopic approaches are available for abdominal vascular surgery: total laparoscopic aortic surgery and hybrid techniques that combine laparoscopy with endovascular techniques to treat failing endografts.

Laparoscopic Vascular Surgery: A Systematic Review

OBJECTIVE

The objective of this systematic review is to evaluate the results of clinical studies on laparoscopic surgery for aorto-iliac disease.

METHODS

A systematic review of the literature from 1966 to September 2006 on laparoscopic and robotic vascular surgery was performed. Only patient series containing more than 5 cases were included. Operative, clamping and anastomosis times, conversion, mortality and morbidity and hospital stay were evaluated.

RESULTS

Thirty studies were identified. These were all descriptive and included 9 comparative studies. Operative times varied widely, the shortest being for hand-assisted procedures (2.5-4 hours) and the longest for totally laparoscopic procedures (4-6.5 hours). Clamping times were all<1 hour in hand-assisted procedures while in other techniques clamping times from 1-2.5 hours were seen. The conversion rate varied from <5% up to 16% in smaller series. The mortality rate was approximately 5% and frequently caused by cardiac ischemia. A variety of problems ranging from minor local wound problems to cardiopulmonary- and renal insufficiency, bleeding, ureter lesions and graft thrombosis were described. Mean hospital stay for nearly all procedures was <1 week.

CONCLUSIONS

Experience of laparoscopic surgery for aorto-iliac disease is still limited. Most study results are biased by patient selection. Only a few surgeons have mastered the required surgical technique and more data are needed to asses the clinical potential of this type of surgery, in comparison with the endovascular alternative. For wider implementation simplification of the surgical procedure seems necessary.

Total Laparoscopic Aortic Surgery: Transperitoneal Direct Approach

OBJECTIVE

We describe the laparoscopic transperitoneal direct approach to the abdominal aorta.

OPERATIVE TECHNIQUE

The patient is placed in the right lateral decubitus position, which allows dropping of the small bowel into right side of the abdomen. Anatomical exposure of the abdominal aorta follows the same steps as in open surgery.

DISCUSSION

Laparoscopic transperitoneal direct approach allows a reproducible exposure of the abdominal aorta. This technique was useful when retrocolic and/or retrorenal approaches were not possible because of previous left nephrectomy.

Instrumentation for laparoscopic renal surgery--Padron Endoscopic Exposing Retractor (PEER) and Endoholder: point of technique

During laparoscopic surgery, as in open surgery, exposure is critical. However, this can be difficult during laparoscopy due to limited haptic feedback and the loss of 3-dimensional visualization. Excessive force may be inadvertently applied by assistants when anatomic structures are retracted; similarly, the retractors may be unknowingly moved because the limited field of view with the laparoscope precludes constant visualization of the retracting instrument. To overcome these problems, we have been using a 5- or 10-mm PEER retractor in combination with an articulating arm instrument holder (Endoholder) to aid laparoscopic renal surgery. The adjustable spring-loaded articulating instrument holder (Endoholder) consists of 4 components, including table attachment, a base rod, flexible extension arm, and precision clamp. The clamp accommodates variously sized instruments, and the flexible extension arm rotates 360 degrees to aid in positioning. The instrument holder is clamped to the table via the base rod over a sterile drape. A PEER Retractor, Roto-lok ratchet (5- or 10-mm diameter and 32-cm length) is placed intracorporeally to retract and position the kidney for hilar, upper, and lower pole dissection. The PEER retractor's handle is secured in place using the precision clamp of the instrument holder. The articulating instrument holder and PEER retractor are used for our renal, adrenal, and ureteral laparoscopic procedures. Placement of the retractor through a 5- or 10-mm port and deployment can be done quickly. Adequate and stable positioning of the retractor provides excellent and secure visualization of the operative field. These instruments have been used in more than 200 cases without any complication except 1 minor liver laceration. The articulating instrument holder with the PEER retractor is a very useful aid during laparoscopic renal surgery. This instrument reduces the chances of inadvertent injury to viscera by the assistant while maintaining an excellent anatomic view throughout the procedure. This will have a significant impact on the advancement of laparoscopy and its acceptance by every urologist.

Totally laparoscopic aortic repair: A new device for direct transperitoneal approach

On the basis of our experience with more than 71 cases of totally laparoscopic aortic surgery by the retrocolic approach, we have developed a new technique by a simple transperitoneal approach. The purpose of this report is to describe that technique and the novel laparoscopic bowel retractor used to ensure stable exposure of the aorta.

Total Laparoscopic Aortobifemoral Bypass

AIM

To assess the feasibility of aortobifemoral bypass by a laparoscopic approach.

MATERIAL AND METHODS

During November 2002 through July 2003 a total of 21 patients with aorto-iliac occlusive disease underwent total laparoscopic aortobifemoral bypass surgery.

RESULTS

The median operative time was 240 (range 150-420) min with a median aortic cross-clamp time of 60 (30-120) min. Operating time was reduced with experience. The median blood loss was 500 (100-2500) ml. One conversion to open surgery for acute dilation of the small bowel was necessary. Post-operative complications occurred in five patients (coagulation problems, disseminated intravascular coagulation secondary to thrombosis of the left limb, cerebro-vascular accident, dyspnoea, lymph leak) and there was no peri-operative death. Median hospital stay was 7 (5-30) days.

CONCLUSION

Aorto-bifemoral bypass using a total laparoscopic approach can be performed safely. As all new techniques, a learning curve is observed. This new technique should be evaluated in a larger randomised trial to assess its clinical value in comparison to conventional surgery.

Enxerto aorto-femoral por via laparoscópica: modelo experimental

OBJETIVO: Verificar a exeqüibilidade de enxerto aorto-femoral por via laparoscópica. MÉTODO: Operamos porco de 75 kg sob anestesia geral. Empregando a técnica do avental (apron) de Dion, expusemos a aorta por laparoscopia. Brevemente, em decúbito dorsal horizontal, dissecamos um "avental" do peritônio parietal esquerdo. A dissecção prosseguiu com rotação medial do cólon esquerdo. O avental, posteriormente fixo à linha mediana, serviu de anteparo às alças intestinais. Pinçamos a aorta e realizamos enxerto aorto-femoral com o tempo abdominal totalmente laparoscópico. RESULTADO: O enxerto foi realizado com sucesso, e o fluxo sangüíneo na prótese foi demonstrado através da incisão femoral. CONCLUSÃO: O enxerto aorto-femoral experimental laparoscópico é exeqüível através da exposição com a técnica do avental.

Total laparoscopic bypass for aortoiliac occlusive lesions: 93-case experience

OBJECTIVES

We describe our experience with a new technique of total laparoscopic bypass surgery to treat aortoiliac occlusive lesions.

MATERIAL AND METHODS

From November 2000 to December 2003, 93 total laparoscopic bypass procedures were performed to treat TASC (TransAtlantic Inter-Society Consensus document) grade C or D aortoiliac occlusive lesions. We also reimplanted 2 inferior mesenteric arteries, and performed 3 prosthesis-superior mesenteric bypasses and 2 suprarenal aorta endarterectomies. Our technique includes a sloping right lateral decubitus installation, which enables a simple transperitoneal left retrocolic or retrorenal approach to the infrarenal abdominal aorta. In patients with a hostile abdomen a retroperitoneal videoscopic approach was used. Aorta-prosthesis laparoscopic anastomoses are performed simply, which averts any trauma to the suture material.

RESULTS

Patients included 76 men and 17 women, with median patient age 61 years (range, 38-79 years). The approach to the aorta was always possible, in particular, in obese patients. It enabled stable aortic exposure during performance of the laparoscopic aorta-prosthesis anastomosis. Median operative time was 240 minutes (range, 150-450 minutes). Median aortic clamping time measured to unclamping of the first prosthetic limb was 67.5 minutes (range, 30-135 minutes). Median duration of aorta-prosthesis anastomosis was 30 minutes (range, 12-90 minutes). The longest durations were mainly observed during the learning curve. Thirty-day postoperative mortality was 4% (4 of 93 patients). Two patients died of myocardial infarction. One patient with American Society of Anesthesiologists grade 4 disease operated on to treat critical ischemia died of multiple organ system failure, and 1 patient died of colonic ischemia. Major nonlethal postoperative complications were observed in 4 patients, and included lung atelectasia in 2 patients, graft infection in 1 patient operated on emergently to treat aortic occlusion, and secondary spleen rupture at day 5 in 1 patient. Median hospital stay was 7 days (range, 2-57 days). With a mean follow-up of 19 months (range, 1-37 months), complete recovery was observed in 89 patients, and all grafts were patent. One patient had kinking of a prosthetic limb at the groin, and in 1 patient Staphylococcus epidermidis graft infection developed, which was treated with in situ replacement with a rifampin-bonded graft.

CONCLUSION

Total laparoscopic aortic bypass is feasible. In patients with TASC C and D aortoiliac occlusive lesions, short-term outcomes are comparable to those with conventional aortic bypass. After the initial learning curve, laparoscopic technique may reduce the operative trauma of aortic bypass.

Total laparoscopic infrarenal aortic aneurysm repair: Preliminary results

OBJECTIVES

We describe our initial experience of total laparoscopic abdominal aortic aneurysm (AAA) repair.

MATERIAL AND METHODS

Between February 2002 and September 2003, we performed 30 total laparoscopic AAA repairs in 27 men and 3 women. Median age was 71.5 years (range, 46-85 years). Median aneurysm size was 51.5 mm (range, 30-79 mm). American Society of Anesthesiologists class of patients was II, III and IV in 10, 19, and 1 cases, respectively. We performed total laparoscopic endoaneurysmorrhaphy and aneurysm exclusion in 27 and 3 patients, respectively. We used the laparoscopic transperitoneal left retrocolic approach in 27 patients. We operated on 2 patients via a tranperitoneal left retrorenal approach and 1 patient via a retroperitoneoscopic approach.

RESULTS

We implanted tube grafts and bifurcated grafts in 11 and 19 patients, respectively. Two minilaparotomies were performed. In 1 case, exposure via a retroperitoneal approach was difficult and, in another case, distal aorta was extremely calcified. Median operative time was 290 minutes (range, 160-420 minutes). Median aortic clamping time was 78 minutes (range, 35-230 minutes). Median blood loss was 1680 cc (range, 300-6900 cc). In our early experience, 2 patients died of myocardial infarction. Ten major nonlethal postoperative complications were observed in 8 patients: 4 transcient renal insufficiencies, 2 cases of lung atelectasis, 1 bowel obstruction, 1 spleen rupture, 1 external iliac artery dissection, and 1 iliac hematoma. Others patients had an excellent recovery with rapid return to general diet and ambulation. Median hospital stay was 9 days (range, 8-37 days). With a median follow-up of 12 months (range, 0.5-20 months), patients had a complete recovery and all grafts were patent.

CONCLUSION

These preliminary results show that total laparoscopic AAA repair is feasible and worthwhile for patients once the learning curve is overcome. However, prior training and experience in laparoscopic aortic surgery are needed to perform total laparoscopic AAA repair. Despite these encouraging results, a greater experience and further evaluation are required to ensure the real benefit of this technique compared with open AAA repair.

Robot-assisted versus Standard Videoscopic Aortic Replacement. A Comparative Study in Pigs

BACKGROUND

Reconstruction of the infrarenal aorta for aneurysms is routinely performed through laparotomy. A less invasive videoscopic approach has not gained wide acceptance due to technical difficulties. Robotic systems could potentially improve imaging of the operative field and surgeon's dexterity during videoscopic surgery and therefore might facilitate the performance of this procedure. The aim of this animal study was to compare the safety and efficacy of a robot-assisted videoscopic aortic replacement to the standard videoscopic approach.

MATERIALS AND METHODS

In 10 female pigs, the infrarenal aorta was partially replaced by a 10 mm polytetrafluoroethylene (PTFE) interposition graft through a videoscopic retroperitoneal approach, using the da Vinci robot system (robot group). Ten other pigs were operated on in a similar fashion, using standard videoscopic instruments (control group). Relevant procedure times, blood loss and complications were registered. Efficacy of the anastomoses was evaluated by measuring patency and blood loss after removing the clamps. Furthermore, circumference and number of stitches were evaluated at autopsy.

RESULTS

The procedure, suturing and clamping times were significantly shorter in the robot group and blood loss was less. In the control group, the inferior vena cava was injured in one pig. In two cases in the control group, haemostasis could not be established after clamp removal. At autopsy, all anastomoses in the robot group were adequate. In the control group, a stitch crossing the aortic lumen was found in two distal anastomoses and a large distance (>3 mm) between two stitches was encountered at least once in 12/20 suture lines. All 20 grafts were patent. No anastomotic narrowing was encountered. The number of stitches used for proximal and distal anastomosis was higher in the robot group.

CONCLUSION

This study demonstrates the superiority of robot-assisted videoscopic aortic replacement over standard videoscopic techniques in an animal model.

Laparoscopy-assisted reconstruction to treat severe aortoiliac occlusive disease: early and midterm results

OBJECTIVES

The purpose of this study was to evaluate the consequences on patient selection and on early and midterm results of the learning curve of a surgical team performing laparoscopy-assisted surgery in the treatment of severe aortoiliac occlusive disease (AIOD).

PATIENTS AND METHOD

Between January 1998 and June 2003, 58 patients (53 men, 5 women; mean age, 59.5 years [range, 37-76 years]) were included in a prospective study and underwent a laparoscopy-assisted aortofemoral reconstruction with graft implantation through a 5-cm to 8-cm minilaparotomy. Fifty-one patients (88%) had claudication (category 2 or 3, Rutherford classification), and seven patients (12%) had tissue loss; at presentation they had TransAtlantic Inter-Society Consensus C (n=24, 41.4 %) or D (n=32, 55.2%) iliac lesions, and the last 2 patients (3.4%) had severe aortic lesions. Perioperative data for the first 29 patients, obtained during the first 34 months of the study (group 1), were compared with data for the last 29 patients, obtained during the last 32 months of the study (group 2). Follow-up consisted of clinical examination or duplex scanning, or both, at 1, 3, 6, and 12 months and yearly thereafter, and computed tomography before discharge and then every 2 years.

RESULTS

One intraoperative surgical conversion (1.7%) was necessary, and two other patients (3.4%) died in the immediate postoperative period. With experience, initial contraindications such as obesity or suprarenal artery aortic clamping were eliminated, making it possible to increase the percentage of patients included, from 53.7% during the first 34 months to 90.6% during the last 32 months (P=.003). The mean duration of the operative procedure decreased from 285 minutes in group 1 to 192 minutes in group 2 (P<.001), and the mean duration of aortic clamping decreased from 76.4 minutes in group 1 to 31.8 minutes in group 2 (P<.001). The number of early repeat interventions was reduced from three (10.3%) in group 1 to 2 (6.9%) in group 2 (P=NS), and the clinical recovery period decreased from 7 days to 4.5 days (P=.05). During a mean follow-up of 26.7 months (range, 1-66 months) there were 5 repeat surgeries (9%) to treat late graft occlusion, establishing midterm primary and secondary patency rates of 89.3% and 91%, respectively. No aortic false aneurysms were detected, and no major amputations were performed.

CONCLUSION

These preliminary results assess the feasability and the safety of this minimally invasive video-assisted technique. A short period of postoperative recovery and good midterm patency rate are the two main benefits of this new surgical option.

Laparoscopy-assisted abdominal aortic aneurysm endoaneurysmorraphy: early and mid-term results

OBJECTIVES

This study was undertaken to evaluate the consequences on patient selection and on early and mid-term results during the learning curve of a surgical team performing laparoscopy-assisted surgery to treat abdominal aortic aneurysm (AAA).

PATIENTS AND METHODS

Between December 1998 and January 2002, 24 patients (22 men, 2 women; mean age, 68.2 years [range, 57-82 years]) were included in a prospective study and underwent laparoscopic transperitoneal AAA dissection followed by graft implantation through a 6 to 9 cm minilaparotomy. Perioperative data for the first 10 patients, obtained during the first 25 months of the study (group 1), were compared with data for the last 14 patients, obtained during the last 13 months of the study (group 2). Follow-up consisted of clinical examination or duplex scanning, or both, at 1, 3, 6, and 12 months and yearly thereafter, and computed tomographic scanning before discharge and yearly thereafter.

RESULTS

One patient (4.3%) died in the immediate postoperative period. In this patient and two others (12.5%), the minilaparotomy was extended intraoperatively, from 12 cm to 16 cm. With experience, initial contraindications such as obesity and short proximal or calcified aortic neck were eliminated, enabling increase in rate of patients included, from 27.7% during the first 25 first months to 56% during the last 13 months (P =.063). Mean duration of operative clamping decreased from 275 minutes in group 1 to 195 minutes in group 2 (P <.0001), and mean duration of aortic clamping decreased from 101 minutes in group 1 to 52 minutes in group 2 (P <.0001). The number of early repeat interventions was reduced from 3 (30%) in group 1 to 2 (14.3%) in group 2 (P =.61), and clinical recovery period decreased from 6.8 days to 4.3 days (P <.005). During mean follow-up of 17.1 months (range, 3-38 months), no late aortoiliac procedures were necessary and no prosthetic abnormality was detected.

CONCLUSION

This minimally invasive video-assisted technique provides good postoperative comfort and excellent mid-term results. Developments in experience and instrumentation have enabled us to include a growing number of patients and to reduce the duration of the procedure.

[Laparoscopic aortoiliac surgery for occlusive disease and or aneurysms]

The techniques of video-assisted surgery have been recently applied to aortoiliac surgery. The choices between first the retroperitoneal approach or the transperitoneal approach and the place of video-assisted surgery in relation to totally laparoscopic surgery are at the centre of debates. The aim of this clarification is to relate the evolution of laparoscopic aortoiliac surgery for occlusive disease and aneurysms through a review of the literature on this subject.

Laparoscopic aortoiliac surgery for aneurysm and occlusive disease: when should a minilaparotomy be performed?

PURPOSE

The purpose of this study was to determine the benefits and the indications of performing a minilaparotomy during laparoscopic abdominal aortoiliac reconstructions.

METHODS

This prospective study was approved by the Commission Consultative de Protection des Personnes dans la Recherche Biomédicale of the University of Marseilles, and all patients gave their informed consent. Between January 1998 and March 2000, 27 patients (23 men; 4 women) with a mean age of 58.2 years (range, 42-76 years) underwent aortoaortic (n = 3), aortounifemoral (n = 4), or aortobifemoral (n = 20) bypass graft for aortoiliac occlusive disease (n = 20), emboligenic aortitis (n = 1), or abdominal aortic aneurysm (AAA) (n = 6). At the beginning of the trial, the decision was made to perform an intraoperative conversion to open surgery in case of bleeding (group 0), when a totally laparoscopic procedure was possible (group I), or when a 6- to 8-cm supraumbilical minilaparotomy was needed in case of technical difficulty (group II). In each case of AAA, the remaining lumbar arteries were controlled (group III); and for the last six patients of this series (group IV), a minilaparotomy was systematically performed.

RESULTS

One patient was admitted with multiple organ failure and died on day 12 (3.7%) with a patent graft. One intraoperative conversion to open surgery (3.7%, group 0) was performed for bleeding; recovery was uneventful. Seven postoperative surgical procedures (26%) were necessary, including two cases of aortic bleeding because of hypertensive access. Seven procedures were totally laparoscopic (group I), and a minilaparotomy was performed in the other 19 cases, including seven cases of technical difficulty (group II). The mean operative and clamping times and the mean postoperative hospital stay were globally (P =.021) and individually (P < or =.016) significantly shorter in group IV when compared with those of the other three groups. Twenty patients (74%) had a postoperative hospital stay of 6 days or less (3-6 days), with minimal complaints of pain, tolerance of oral feeding on day 2, and mobilization on day 2 or 3. All bypass grafts remained patent after a mean follow-up of 11 months (1-26 months).

CONCLUSION

With regard to the instrumentation presently available, this study shows the benefit of a minilaparotomy when performing a laparoscopic aortoaortic or aortofemoral bypass graft for the treatment of aortoiliac occlusive disease and AAA.