Complications of therapeutic laparoscopy

Complications Related to the Initial Trocar Insertion of 3 Different Techniques: A Systematic Review and Meta-analysis

This systematic review aimed to investigate complications related to initial trocar insertion among 3 different laparoscopic techniques: Veress needle (VN) entry, direct trocar entry (DTE), and open entry (OE). A literature search was completed, and complications were assessed. Major vessel injury, gastrointestinal injury, and solid organ injury were defined as major complications. Minor complications were defined as subcutaneous emphysema, extraperitoneal insufflation, omental emphysema, trocar site bleeding, and trocar site infection. Arm-based network meta-analyses were performed to identify the differences in complications among the 3 techniques. Seventeen studies were included in the quantitative analysis. DTE resulted in fewer major complications when compared with VN entry although the difference was not significant (p = .23) as well as significantly fewer minor complications (p < .001). There were no significant differences in minor complications when comparing OE and DTE (p = .74). Fewer major complications were observed with OE compared with VN entry although the difference was not significant (p = .31). There were significantly fewer minor complications for patients who underwent OE (p = .01). DTE patients experienced the least number of minor complications followed by VN entry and OE. In conclusion, major complications are extremely rare, and all 3 insertion methods can be performed without mortality.

Individualized feedback during simulated laparoscopic training:a mixed methods study

OBJECTIVE

This study aimed to explore the value of individualized feedback on performance, flow and self-efficacy during simulated laparoscopy. Furthermore, we wished to explore attitudes towards feedback and simulator training among medical students.

METHODS

Sixteen medical students were included in the study and randomized to laparoscopic simulator training with or without feedback. A teacher provided individualized feedback continuously throughout the procedures to the target group. Validated questionnaires and scales were used to evaluate self-efficacy and flow. The Mann-Whitney U test was used to evaluate differences between groups regarding laparoscopic performance (instrument path length), self-efficacy and flow. Qualitative data was collected by group interviews and interpreted using inductive thematic analyses.

RESULTS

Sixteen students completed the simulator training and questionnaires. Instrument path length was shorter in the feedback group (median 3.9 m; IQR: 3.3-4.9) as compared to the control group (median 5.9 m; IQR: 5.0-8.1), p<0.05. Self-efficacy improved in both groups. Eleven students participated in the focus interviews. Participants in the control group expressed that they had fun, whereas participants in the feedback group were more concentrated on the task and also more anxious. Both groups had high ambitions to succeed and also expressed the importance of getting feedback. The authenticity of the training scenario was important for the learning process.

CONCLUSIONS

This study highlights the importance of individualized feedback during simulated laparoscopy training. The next step is to further optimize feedback and to transfer standardized and individualized feedback from the simulated setting to the operating room.

Large bowel injuries during gynecological laparoscopy

Laparoscopy is one of the most frequently preferred surgical options in gynecological surgery and has advantages over laparotomy, including smaller surgical scars, faster recovery, less pain and earlier return of bowel functions. Generally, it is also accepted as safe and effective and patients tolerate it well. However, it is still an intra-abdominal procedure and has the similar potential risks of laparotomy, including injury of a vital structure, bleeding and infection. Besides the well-known risks of open surgery, laparoscopy also has its own unique risks related to abdominal access methods, pneumoperitoneum created to provide adequate operative space and the energy modalities used during the procedures. Bowel, bladder or major blood vessel injuries and passage of gas into the intravascular space may result from laparoscopic surgical technique. In addition, the risks of aspiration, respiratory dysfunction and cardiovascular dysfunction increase during laparoscopy. Large bowel injuries during laparoscopy are serious complications because 50% of bowel injuries and 60% of visceral injuries are undiagnosed at the time of primary surgery. A missed or delayed diagnosis increases the risk of bowel perforation and consequently sepsis and even death. In this paper, we aim to focus on large bowel injuries that happen during gynecological laparoscopy and review their diagnostic and management options.

Gynaecological laparoscopic surgery: eight years experience in the Yaoundé Gynaeco-Obstetric and Paediatric Hospital, Cameroon

This is a retrospective analysis of eight years of gynaecological laparoscopic surgery in a resource-limited setting. All gynaecological patients managed by laparoscopy at the Yaoundé Gynaeco-Obstetric and Paediatric Hospital from 1 January 2004 to 30 November 2011 were included. Amongst the 9194 gynaecological surgeries performed during the study period, 6.9% (633) were done by laparoscopy. Most of the women underwent an operative laparoscopy (568/592; 95.9%). The most common indication was infertility (415/592; 70.1%). Diagnostic laparoscopies were mostly indicated for chronic pelvic pain (18/24; 75%). The most common surgical finding was tubo-peritoneal adhesions (412/592; 69.6%). A total of 35 patients (35/592; 5.9%) had at least one complication. The mean duration of hospitalization was 3.4 ±1.8 days. The general uptake of gynaecological laparoscopic surgery is low in our setting. The laparoscopic complication rate of 5.9% is encouraging.

A safe quick technique for placement of the first access port for creation of pneumoperitoneum

The authors recommend a modified open technique in placing the first port when intraabdominal adhesions are expected.

Introduction:

Closed and open techniques for creation of pneumoperitoneum are being used simultaneously with varying frequencies. Some studies analyzing slight modifications to both approaches have been published and others are under way. We conducted this study to eliminate some of the disadvantages of the open technique, an already proven safer technique.

Patients & Methods:

In a total of 1250 consecutive patients, who underwent various laparoscopic procedures, a modified open technique was used. This technique involves identification and incision of a point at a junction of the umbilical stalk and linea alba infraumbilically. With this technique, penetration of a blunt trocar was possible under direct vision with minimal and controlled axial force. Time needed to induce pneumoperitoneum, intraoperative (vascular and other organ injury) and postoperative complications were recorded, and data were analyzed.

Results:

Intraabdominal access was successfully achieved in all cases without any vascular or solid organ injury except in 3 (0.24%) cases. In these 3 cases, the procedure failed due to severe adhesions, because of previous abdominal surgeries. Mean time taken to induce pneumoperitoneum was 4.0 minutes (range, 2 to 9.5), while time required to close the first access port was 4.5 minutes (range, 3 to 8). Enterotomy occurred in 2 (0.16%) cases, while a postoperative port-site hernia occurred in 2 (0.16%) cases. Port-site infection occurred in 6 (0.48%) cases, and port-site hematoma in 4 (0.32%) cases. Gas spillage was recorded in only 6 (0.48%) cases.

Conclusion:

We recommend a modified open technique as the technique of choice in all cases requiring laparoscopic surgery in general and developing countries in particular where intraabdominal adhesions are not uncommon.

Postoperative bowel herniation in a 5-mm nonbladed trocar site

The possibility of a strangulated hernia involving a 5-mm port site warrants consideration under the appropriate clinical scenario.

Background:

Incisional hernias are a rare complication of laparoscopic surgery, with a reported incidence of <1%.

Case Report:

We describe a case of bowel herniation and strangulation involving a 5-mm trocar site.

Conclusion:

Although there is growing literature supporting fascial closure of abdominal port sizes ≥10mm, there is sparse data to suggest closure of 5-mm port sites. Our case illustrates that in appropriate clinical scenarios, the possibility of a strangulated hernia involving a 5-mm port site warrants consideration.

Balloon blunt-tip trocar for laparoscopic cholecystectomy: improvement over the traditional Hasson and Veress needle methods

BACKGROUND AND PURPOSE

Laparoscopic cholecystectomy (LC) is a routine procedure for most general surgeons, yet the technical aspects of gaining access to the peritoneal cavity continue to be quite diverse. We describe a prospective review of 180 LCs using three access techniques: open balloon blunt-tip trocar (BBTT), open Hasson (HA), and closed Veress needle (VN). We favor the BBTT because it is designed to avoid all sharp instrumentation and offers superior seal and mobility, as well as expeditious and easy abdominal access.

PATIENTS AND METHODS

The techniques and devices were evaluated prospectively with regard to simplicity of access, leakage of carbon dioxide, access time, and complications. All patients underwent LC by one of two Board-certified surgeons.

RESULTS

The mean time to insertion of the laparoscope for the BBTT (3.5 +/- 0.99 minutes) was significantly less than the insertion time for the VN technique (5.2 +/- 0.9 minutes, P < 0.05). The insertion time for the BBTT was also less than for the standard HA approach (4.25 +/- 1.0 minutes; P < 0.05). There were no visceral or vascular injuries noted, but CO2 leakage and subcutaneous insufflation of gas experienced in the standard HA and VN groups resulted in lengthened operative times. One patient in the BBTT group experienced a postoperative port-site herniation, which was repaired primarily without consequence.

CONCLUSION

The BBTT is an established, safe alternative to blind access for LC. Our technique is simple and rapid and avoids most of the technical difficulties encountered by other open access devices. We believe this method provides surgeons with an option that is efficient and easier to perform than most other conventional open-access laparoscopic techniques.

Pneumoperitoneum produces reversible renal dysfunction in animals with normal and chronically reduced renal function

Laparoscopic surgery with intraperitoneal insufflation is associated with acute oliguria. Although in healthy patients, this impairment is transient and without any apparent sequelae, as the scope of laparoscopic surgery expands, subtle renal injury may become clinically significant, particularly when applications expand to patients with reduced baseline renal function. We have investigated the changes in renal function during and after pneumoperitoneum in animals with reduced renal mass to identify both acute alterations and long-term impairments, if any. Twelve swine underwent surgical reduction in renal mass to produce chronic renal insufficiency. Glomerular filtration rate (GFR) was determined by inulin clearance for each animal before and after ablation to establish the degree of renal impairment (mean 22%; range 18%-31% of normal). The animals were followed during a stepwise insufflation as a study of pneumoperitoneum-induced changes in chronic renal failure. Urine output declined dramatically (-80% at 20 mm Hg), the GFR fell (-63% at 20 mm Hg), and renal blood flow declined (mean -12%; range -9% to -19%) over the course of the test. These values did not return to baseline during a 90-minute observation period after release of the pneumoperitoneum. Acute renal failure occurred despite aggressive hydration with maintenance of central venous pressure and only modest changes in cardiac output. The animals were exposed to a 6-hour CO2 pneumoperitoneum to 20 mm Hg to model the insult of complex laparoscopy. This exposure resulted in elevation of the amount of N-methyl-beta-D-glucosaminidase being shed into the urine in addition to the previously indicated impairments. The animals were allowed to recover for 1 week, and then GFR was again measured. The GFR returned to the preexposure chronic renal failure levels for both the group as a whole and individual animals. The magnitude and duration of the alteration in urine output, GFR, and renal blood flow suggest that regulatory mechanisms rather than simple mechanical forces are involved in the acute changes. No long-term impact on renal function from the acute renal injury was identified, even in animals with existing renal insufficiency.

Laparoscopic surgery and its potential for medical complications

Laparoscopic surgery is very popular among physicians and patients because this technique is associated with safety, shorter hospital stay, early return to normal activity, and cosmetic acceptance of the operative scar. Although the procedure involves minimal invasion and tissue damage, it has potentially serious complications, including cardiopulmonary effects that result mainly from hypercarbia and raised intraabdominal pressure caused by pneumoperitoneum. Absorbed carbon dioxide from the peritoneal cavity tends to cause acidosis. Leakage of the gas into tissue spaces may induce subcutaneous emphysema, pneumothorax, pneumomediastinum and pneumopericardium. Cardiac effects include arrhythmias, hypotension, cardiac arrest, gas embolism, pulmonary edema, and myocardial ischemia or infarction. Some of these effects, though rare, are serious and potentially fatal. Physicians should anticipate these problems in their patients undergoing laparoscopic procedures. This review discusses the technique of and physiologic considerations in laparoscopic surgery as well as its potential complications.

The efficacy of epidural anesthesia for endoscopic preperitoneal herniorrhaphy: a prospective study

Laparoscopic herniorrhaphy has been criticized because of the need for general anesthesia. The endoscopic preperitoneal approach allows the use of epidural anesthesia, obviating the potential complications and side effects seen with general anesthesia. The purpose of this study was to determine the efficacy of epidural anesthesia for preperitoneal herniorrhaphy. Fifty-two patients underwent repair of a total of 80 hernias over a 6-month period. Thirty-six patients underwent their repairs with the use of epidural anesthesia with the goal of a T-4 sensory level. A tension-free prosthetic repair was performed in all patients. Seventeen patients had unilateral repairs and nineteen had bilateral repairs under epidural, while seven patients had unilateral repairs and nine patients had bilateral repairs under general anesthesia. There were no significant differences in patient demographics. All herniorrhaphies were electively performed on an outpatient basis by a single surgeon (A.L.S.) in a teaching setting. There were no significant differences for unilateral and bilateral repairs when type of anesthesia was compared. There was only one conversion from epidural to general anesthesia, secondary to poor sensory blockade first noticed during creation of the preperitoneal space (97% success rate). Seven patients receiving epidural anesthesia experienced pneumoperitoneum during the procedure. This did not effect the ability to perform the hernia repair successfully. There were no complications related to the epidural anesthetic. Endoscopic preperitoneal herniorrhaphy can be performed effectively under epidural anesthesia, obviating the need for general anesthesia.

Vena cava injuries during laparoscopic cholecystectomy

Two instances of vena cava injury occurring during insertion of a new trocar for laparoscopic surgery are presented. The mechanism of injury in each case was identical. These injuries are extremely rare, and fortunately both patients survived. Any new instrument that is purported to be an improvement over existing ones should be critically evaluated so that needless and unnecessary injuries such as these can be avoided.

Gastroesophageal reflux in childhood

Gastroesophageal reflux (GER) is one of the most frequent symptomatic clinical disorders affecting the gastrointestinal tract of infants and children. During the past 2 decades, GER has been recognized more frequently because of an increased awareness of the condition and also because of the more sophisticated diagnostic techniques that have been developed for both identifying and quantifying the disorder. Gastroesophageal fundoplication is currently one of the three most common major operations performed on infants and children by pediatric surgeons in the United States. Normal gastroesophageal function is a complex mechanism that depends on effective esophageal motility, timely relaxation and contractility of the lower esophageal sphincter, the mean intraluminal pressure in the stomach, the effectiveness of contractility in emptying of the stomach, and the ease of gastric outflow. More than one of these factors are often abnormal in the same child with symptomatic GER. In addition, in patients with GER disease, and particularly in those patients with neurologic disorders, there appears to be a high prevalence of autonomic neuropathy in which esophagogastric transit and gastric emptying are frequently delayed, producing a somewhat complex foregut motility disorder. GER has a different course and prognosis depending on the age of onset. The incompetent lower esophageal sphincter mechanism present in most newborn infants combined with the increased intraabdominal pressure from crying or straining commonly becomes much less frequent as a cause of vomiting after the age of 4 months. Chalasia and rumination of infancy are self-limited and should be carefully separated from symptomatic GER, which requires treatment. The most frequent complications of recurrent GER in childhood are failure to thrive as a result of caloric deprivation and recurrent bronchitis or pneumonia caused by repeated pulmonary aspiration of gastric fluid. Children with GER disease commonly have more refluxing episodes when in the supine position, particularly during sleep. The reflux of acid into the mid or upper esophagus may stimulate vagal reflexes and produce reflex laryngospasm, bronchospasm, or both, which may accentuate the symptoms of asthma. Reflux may also be a cause of obstructive apnea in infants and possibly a cause of recurrent stridor, acute hypoxia, and even the sudden infant death syndrome. Premature infants with respiratory distress syndrome have a high incidence of GER. Esophagitis and severe dental carries are common manifestations of GER in childhood. Barrett's columnar mucosal changes in the lower esophagus are not infrequent in adolescent children with chronic GER, particularly when Heliobacter pylori is present in the gastric mucosa. Associated disorders include esophageal dysmotility, which has been recognized in approximately one third of children with severe GER. Symptomatic GER is estimated to occur in 30% to 80% of infants who have undergone repair of esophageal atresia malformations. Neurologically impaired children are at high risk for having symptomatic GER, particularly if nasogastric or gastrostomy feedings are necessary. Delayed gastric emptying (DGE) has been documented with increasing frequency in infants and children who have symptoms of GER, particularly those with neurologic disorders. DGE may also be a cause of gas bloat, gagging, and breakdown or slippage of a well-constructed gastroesophageal fundoplication. The most helpful test for diagnosing and quantifying GER in childhood is the 24-hour esophageal pH monitoring study. Miniaturized probes that are small enough to use easily in the newborn infant are available. This study is 100% accurate in diagnosing reflux when the esophageal pH is less than 4.0 for more than 5% of the total monitored time.

Complications of laparoscopic cholecystectomy

Video technology allows surgeons to offer patients operations through small incisions. While these minimally invasive techniques have been employed for a wide range of operations for many years, only recently has a laparoscopic cholecystectomy been possible. Compared to the same operation performed via laparotomy, it is deemed the "gold standard." Overall mortality after laparoscopic cholecystectomy ranges from 0-1%, and the rate of major complications is less than 5%. As a group, general surgeons are beyond their initial learning curve for laparoscopic cholecystectomy, but the majority of iatrogenic injuries can be successfully avoided by appreciating the limitations and pitfalls of laparoscopic surgery, and by carefully dissecting the hepatocystic triangle before dividing any structure. Early identification and management of complications will minimize potentially devastating complications of small, unrecognized injuries. Physicians need to accurately advise patients of the proposed advantages and potential problems of laparoscopic cholecystectomy before referring them to a surgeon.