Can near infrared spectroscopy measure the effect of pressure on oxygenation of sacral soft tissue?

OBJECTIVE

To test whether near infrared spectroscopy (NIRS) is applicable for the examination of the influence of external pressure on oxygenation of the soft tissues in the sacral area.

METHOD

Tissue oxygenation was measured in 33 healthy volunteers in the prone position. A NIRS probe was positioned over the sacrum and external pressure was applied in 10 mmHg increments, from 20 mmHg to 200 mmHg and then decreased. At each level, tissue oxygen saturation (StO2) was measured. To test reproducibility, the protocol was repeated in six volunteers, in whom the thickness of the soft-tissue envelope at different levels of external pressure was assessed using ultrasound.

RESULTS

There was wide variability in StO2 courses between the 33 subjects, with a non-linear relationship between pressure and StO2. The only consistent finding was that the StO2 was significantly higher after decreasing pressure than at the initial pressure of 20 mmHg, which is indicative of reactive hyperaemia. Despite the application of high external pressures, reasonable tissue oxygenation was maintained in 19 of 33 subjects. Reproducibility of the measurements was poor. Comparison of soft-tissue thickness with corresponding StO2 values showed that, with increasing pressure, the percentage decrease in tissue thickness was higher than the decrease in tissue oxygenation.

CONCLUSION

This study confirms that NIRS is not useful for assessing tissue oxygenation in pressure ulcer research due to unacceptable inter-individual variability and poor reproducibility of measurements.

Manual robot assisted endoscopic suturing: time-action analysis in an experimental model

BACKGROUND

Robotic surgery systems were introduced to overcome the disadvantages of endoscopic surgery. The goal of this study was to assess whether robot assistance could support endoscopic surgeons in performing a complex endoscopic task.

METHODS

Five experienced endoscopic surgeons performed end-to-end anastomosis on post-mortem porcine small intestine. The procedure was performed both with standard endoscopic techniques and with robotic assistance (da Vinci system, Intuitive Surgical, Sunny vale, CA). It was performed in three different working directions with a horizontal, vertical, and diagonal position of the bowel. Anastomosis time, number of stitches, knots, time per stitch, suture ruptures, and the number of stitch errors were recorded. Also, an action analysis was performed.

RESULTS

Anastomosis time, number of stitches, and the number of knots did not differ significantly between the two groups. The time needed per stitch was significantly shorter with robot assistance (81.4 sec/stitch vs 95.9 sec/stitch, p = 0.005). More suture ruptures occurred in the robot group (0 (0-2) vs 0 (0-0), p = 0.003). In the standard group more stitch errors were found (2 (0-5) vs 0 (0-3), p = 0.017). These results were comparable for three different working directions. The action analysis, however, showed significant benefits of robotic assistance. The benefits were greatest in a vertical bowel position.

CONCLUSION

Robot assistance might offer added value to experienced endoscopic surgeons in the performance of a small-bowel anastomosis in an experimental setup, even though total anastomosis time could not be demonstrated to be shorter and some suture tears occurred due to the lack of force feedback.

Long-Term Results of Fasciotomy of the Anterior Compartment in Patients with Exercise-Induced Pain in the Lower Leg

This prospective study aims to describe the results of fasciotomy in patients with exercise-induced pain in the lower leg with suspected (chronic) exertional compartment syndrome. The diagnosis of (chronic) exertional compartment syndrome was made if pain in the lateral side of the lower leg after a standard physical load was accompanied by elevated tissue pressures in the anterior muscle compartment. Tissue measurements were performed in 114 patients. In 56 patients (106 compartments) increased tissue pressure was found (> 50 mmHg measured immediately after exercise, or > 30 mmHg if the pressure before exercise > 20 mmHg, or if the pressure five minutes after exercise is still > 30 mmHg). Two years after fasciotomy, (remaining) complaints were evaluated on the basis of a questionnaire: 87 % of the patients had significant reduction in complaints. Patients who were not found to have increased tissue pressure were also asked to report developments through the questionnaire. In 18 patients a fasciotomy was performed on the basis of the typical history, despite normal or slightly increased intramuscular pressures. Twelve of these patients (24 compartments) were asymptomatic after surgery. Fasciotomy in patients with a (chronic) exercise-induced compartment syndrome in the anterior compartment of the lower leg, based on our criteria, gave a marked reduction in symptoms in 87 % of the patients. Further research has to be done for the minimum tissue pressures above which fasciotomy may be successful in terms of reducing complaints.

Comparison of two surveillance methods for detecting nosocomial infections in surgical patients

Nosocomial infections play a role in quality and cost control in health care. Surveillance of these infections is the only way to gain more insight into their frequency and causes. Since the results of surveillance may lead to changes in both patient and hospital management, which are sometimes major, it is necessary that all healthcare workers involved agree on the criteria used for the diagnosis and surveillance of these complications. In order to compare the efficacy of two surveillance methods, nosocomial infections in surgical patients were registered by both the Department of Surgery (complication surveillance [CS]) and the Department of Infection Control (nosocomial infection surveillance [NIS]) at the University Medical Center Utrecht, The Netherlands, over a 2-month period. The CS team used the national criteria of the Association of Surgeons of the Netherlands and the NIS team used the international criteria of the Centers for Disease Control and Prevention, USA, to define cases of nosocomial infection. A total of 515 patients were included in both arms of the study. The CS team diagnosed 69 infections in 49 patients, and the NIS team diagnosed 64 infections in 45 patients. Of 104 total infections, 39 were diagnosed by the CS team exclusively, 35 by the NIS team exclusively and only 30 by both. The main reasons for the inconsistent results were as follows: (i) the lack of follow-up after discharge in the NIS arm, (ii) the use of clinical criteria for the definition of a nosocomial infection in the CS arm, and (iii) the use of positive cultures as part of the criteria in the NIS arm. From the perspective of infection control, the CS system cannot be recommended for the surveillance of nosocomial infections.

[Adverse effects if smoking on healing of bones and soft tissues]

This article reviews the current body of knowledge on the adverse effects of smoking on soft-tissue and bone healing, with emphasis on tibial fractures in combination with severe soft-tissue injury. The pathophysiological effects are multidimensional, including arteriolar vasoconstriction, cellular hypoxia, demineralisation of bone, and delayed revascularisation. Several animal and clinical studies have been published about the negative effects of smoking on bone metabolism and fracture healing. These studies show that smokers have a significantly longer time to clinical union than non-smokers and a higher incidence of non-union. The negative effects of smoking gained increased interest among plastic and microvascular surgeons, because smokers have been shown to suffer higher rates of flap failure, tissue necrosis, and haematoma formation. Especially smokers presenting with an open tibial fracture will suffer the negative effects of their smoking behaviour, because these fractures are inextricably bound up with soft-tissue injury. Their fractures will need a significantly longer time to heal than in non-smokers, and will have a higher incidence of non-union. If microvascular surgery is to be performed, persistent smoking significantly increases the rate of postoperative complications, with wound infection, partial flap necrosis, and skin graft loss being more common. Cessation of smoking has both short- and long-term beneficial effects. Nowadays, there is strong evidence to be very insistent that patients presenting with a (open) tibial fracture should refrain from smoking immediately to promote bone healing and to lower the complication rate. In case of elective reconstructive procedures, patients should refrain from smoking at least 4 weeks before surgery. In both situations, cessation should continue during the full rehabilitation period.

Prediction of serious complications in patients admitted to a surgical ward

BACKGROUND

Prediction of complications is an essential part of risk management in surgery. Knowing which patients are at high risk of developing complications will contribute to the quality and cost reduction of surgery.

METHODS

All patients admitted to a general surgical ward during a 1-year interval were followed until 30 days after discharge. Complications and data on potential risk factors were recorded prospectively. Relative risks were calculated for each risk factor and predictive values for the development of a serious or minor complication were computed using logistic regression analysis. The predictive values of different combinations of variables were expressed as receiver operating characteristic curves.

RESULTS

Of 3075 patients, 375 suffered one or more serious complications and 319 experienced a minor complication. A model was developed for prediction of serious complications, consisting of 11 variables, with an area under the curve (AUC) of 0.79 (95 per cent confidence interval (c.i.) 0.76 to 0.81). The prognostic value of the model for minor complications (seven variables) was lower (AUC 0.68 (95 per cent c.i. 0.65 to 0.71)).

CONCLUSION

Serious complications in patients admitted to a surgical ward can be predicted using a model consisting of 11 variables. The risk score can be used in the decision-making process before surgery.

The floating shoulder. A multicentre study

The aim of this retrospective study was to review a series of patients with ipsilateral fractures of the neck of the scapula and of the clavicle. Between 1991 and 1996 a total of 79 general and orthopaedic surgeons treated 46 patients with a floating shoulder in The Netherlands. The records and radiographs of these patients were studied. Of the 35 patients available for follow-up, 31 had initially been treated conservatively and four by operation; three underwent secondary reconstructive surgery. The mean Constant score for the 28 patients treated conservatively was 76 and for the seven treated operatively it was 71 at a mean follow-up of 35 months. In six of the 28 patients treated conservatively the glenoid was dislocated caudally at the end of treatment; they had a score of 42. In the 22 patients without this dislocation the score was 85. We conclude that this rare injury is not inherently unstable and, in the absence of caudal dislocation of the glenoid, conservative treatment gives a good functional outcome.

Quality of life after severe bacterial peritonitis and infected necrotizing pancreatitis treated with open management of the abdomen and planned re-operations

OBJECTIVE

To determine quality of life after severe bacterial peritonitis and infected necrotizing pancreatitis treated with open management of the abdomen and planned re-operations.

DESIGN

Retrospective chart review.

SETTING

University hospital intensive care unit, general wards, and outpatient department.

PATIENTS

Forty-one patients who survived severe bacterial peritonitis and infected necrotizing pancreatitis treated with open management of the abdomen and planned re-operations.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

Over a period of 7 yrs, 95 patients underwent open management of the abdomen and planned re-operations for severe bacterial peritonitis and infected necrotizing pancreatitis. Thirty-nine patients died during the initial intensive care unit stay and 12 as a result of nonperitonitis-related systemic diseases after discharge. Four patients were lost or excluded from final analysis. Long-term morbidity and quality of life using Karnofsky and Rankin scores at discharge and at follow-up at least 1 yr after discharge (mean: 4 yrs) and the Sickness Impact Profile (SIP) were determined. The remaining 41 patients reviewed showed significant long-term morbidity, including dysfunction of the abdominal wall resulting from herniation, persistent polyneuropathy, and mental disorders needing psychiatric support. Patients having persistent polyneuropathy and, to a lesser extent, mental disorders, showed significantly lower Karnofsky, higher Rankin, and higher SIP scores. After discharge, performance status of patients improved significantly, as shown by higher Karnofsky and lower Rankin scores, and, because Karnofsky and Rankin scores are closely related to SIP scores, higher SIP scores. Especially in measuring quality of life in terms of social and role management, assessment of the SIP proved to have additional value.

CONCLUSIONS

About three-quarters of patients who survive open management of the abdomen and planned re-operations for severe bacterial peritonitis and infected necrotizing pancreatitis regain a good quality of life. Some patients, especially those who suffer from persistent polyneuropathy and mental disorders, show restrictions in daily life.

The floating shoulder

The aim of this retrospective study was to review a series of patients with ipsilateral fractures of the neck of the scapula and of the clavicle. Between 1991 and 1996 a total of 79 general and orthopaedic surgeons treated 46 patients with a floating shoulder in The Netherlands. The records and radiographs of these patients were studied. Of the 35 patients available for follow-up, 31 had initially been treated conservatively and four by operation; three underwent secondary reconstructive surgery. The mean Constant score for the 28 patients treated conservatively was 76 and for the seven treated operatively it was 71 at a mean follow-up of 35 months. In six of the 28 patients treated conservatively the glenoid was dislocated caudally at the end of treatment; they had a score of 42. In the 22 patients without this dislocation the score was 85. We conclude that this rare injury is not inherently unstable and, in the absence of caudal dislocation of the glenoid, conservative treatment gives a good functional outcome.

Results of group-circumcision of Muslim boys in Malaysia with a new type of disposable clamp

This study evaluates the safety and results of surgery usingTaraKlamp Circumcision Device during a group circumcision. Atotal of 64 circumcisions of Muslim boys were performed by Medical Assistants supervised by Medical Doctors in a hall in Kuala Lumpur, Malaysia. A new type disposable clamp was used, which was removed 4 days after the operation. No major complications occurred and the boys experienced in general mild pain postoperatively. Mostly good cosmetic results were obtained and 90% of the parents would recommend this new clamp to others. Group circumcisions withTaraKlamp Circumcision Device (Kuala Lumpur, Malaysia) are safe, although proper patient selection and adequate training in using the device are mandatory.

The diagnostic value of MRI scans for the diagnosis of chronic exertional compartment syndrome of the lower leg

OBJECTIVE

A prospective descriptive study to determine the value of magnetic resonance imaging (MRI) as an aid in diagnosing (chronic) exertional compartment syndrome.

DESIGN AND PATIENTS

MRI was performed in 21 patients (41 anterior compartments) with chronic compartment syndrome at rest and following physical exercise. Median (T2-weighted) signal intensity on the MRI scan was determined in the anterior and the (superficial) posterior compartment of the lower leg before and after exercise. Postexercise increases in the signal intensity in these two compartments were compared. After fasciotomy, a second MRI scan was performed in 13 patients (25 anterior compartments) on the basis of the same protocol. MR studies were performed in 12 normal controls (24 anterior muscle compartments) on the basis of the same protocol.

RESULTS

T2-weighted signal intensity increased by 27.5% (range 13.6-38.6%) following exercise in the anterior compartment of patients with a chronic compartment syndrome. In the posterior compartment this increase amounted to 4.25% (range 0-10.2%). Following fasciotomy, the increase in the anterior compartment was 4.1% (range 1.0-5.2%), while the increase in the posterior compartment amounted to 5.6% (range 0-11.0%), In normal controls, the increase in the anterior compartment was 7.6% (range 0-9. 1%), while in the posterior compartment it was 4.0% (range 0-7.2%).

CONCLUSIONS

In patients with a chronic compartment syndrome, the affected (anterior) compartment shows a statistically significant increase in (T2-weighted) signal intensity during exercise compared with both the (superficial) posterior compartment and the anterior compartment of normal controls. This effect disappeared after fasciotomy. In view of the substantial increase in T2-weighted signal intensity, MRI can be used in diagnosing chronic compartment syndrome.

Grade III open tibial fractures: functional outcome and quality of life in amputees versus patients with successful reconstruction

The purpose of this study was to assess the long-term functional outcome and the quality of life of patients who were treated for a (Gustilo) Grade III open tibial fracture. We included 43 patients with successful limb salvage (group A) and 21 amputees (group B). The groups were similar with regard to age, sex, and Injury Severity Score (ISS). The functional outcome was scored using the "Guides to the Evaluation of Permanent Impairment". To compare quality of life we used the Nottingham Health Profile (NHP), the SF-36, and a questionnaire especially designed for this study. The mean lower extremity impairment (AMA) of patients in group A was 17.6%, compared to 73.5% for patients in group B. The results with both NHP and SF-36 show that patients in both groups have more problems in most categories than a healthy reference group. With the NHP, the difference in score was largest for the categories of pain, mobility, energy and sleep. The SF-36 scores correlated well with the NHP scores. No significant difference was found between the two groups. This type of injury has an enormous impact on every aspect of life--irrespective of the chosen treatment. A significant difference in lower extremity impairment is found between patients with a successful reconstruction and those who are amputees. However, the quality of life was shown to be the same.

Arthrodesis after osteosynthesis and infection of the ankle joint

Nineteen patients with a severely infected ankle joint after previous osteosynthesis were treated with arthrodesis in our institution. Their notes and X-rays were reviewed. Goals of treatment were eradication of infection by aggressive débridement of infected tissues, obtaining adequate soft-tissue coverage, preservation/restoration of bonelength, and finally consolidation of the arthrodesis. Thirteen men and six women were treated, with a median age of 46 (17-69) years. Arthrodesis took place after a median of 6 months (0.5-40) post-accident, and after one to six earlier operative procedures. Primarily there had been four bimalleolar, five trimalleolar and ten pilon tibial fractures. Fifteen fractures were open with severe soft tissue damage. Seven free muscle transfers were performed, and ten cancellous bone graftings. Finally 29 attempts at arthrodesis were performed. Ultimately we had to perform two amputations. After a mean follow up of 3.5 years, one patient has an aseptic but asymptomatic pseudarthrosis, for which no further surgery is scheduled. Sixteen extremities are free from infection while full weightbearing is possible. The limb-threatening problem of deep infection after osteosynthesis of an ankle fracture can be resolved by consistent but prolonged treatment. After successful arthrodesis a weightbearing extremity without infection remains in the majority of cases.

Pulse oximeter-induced digital injury: frequency rate and possible causative factors

OBJECTIVE

To study the frequency rate of and factors associated with pulse oximeter-induced digital injury (PIDI).

DESIGN

Prospective descriptive study.

SETTING

Surgical intensive care unit of a university hospital.

PATIENTS

All patients with a length of stay of >2 days.

INTERVENTIONS AND MAIN RESULTS

We monitored 125 patients by using a pulse oximeter with a nondisposable clip-on probe changed every 3-4 hrs from one finger to another. Daily inspection was performed with special attention to digital injury. Factors implicated in the pathogenesis of PIDI, such as vasopressor therapy, hypotension, hypoxia, hypothermia, and arterial cannulation of the radial or ulnar artery were recorded daily. A total of 22 patients received norepinephrine and dopamine, 34 patients were given dopamine, and 69 patients did not receive vasoactive drugs. PIDI developed in 6 of 125 patients, five in the norepinephrine/dopamine group, one in the dopamine group, and none in the patients not receiving vasopressors. When comparing the frequency rate of PIDI in patients receiving norepinephrine (5 of 22) with patients not receiving norepinephrine (1 of 103) the relationship between the use of norepinephrine and PIDI is significant (p < .001). However, this relationship may also be explained by the fact that patients in the norepinephrine group were more severely ill than patients not requiring norepinephrine were. This is reflected by a higher median severity of illness score (Simplified Acute Physiology Score II) (p = .001), median duration of hypotension (p < .001), median number of saturation drops (p < .001), and higher mortality rate (p < .001). Hypothermia did not occur in any of the patients. There was no significant difference between the median right-left difference in duration of arterial cannulation between the two subgroups (p = .8). In all surviving patients, PIDI healed without permanent damage.

CONCLUSIONS

In the studied population of critically ill patients in a surgical intensive care unit, the frequency rate of PIDI was 5% (6 of 125). Although an association with the use of norepinephrine was found, this small number of cases does not allow definite statistical conclusions concerning a relationship between the possible causative factors and PIDI. However, severely ill patients, as indicated by their need for more aggressive vasopressors, are more likely to develop PIDI. In survivors, PIDI healed without sequelae.

Functional results after treatment of hip fracture: a multicentre, prospective study in 215 patients

OBJECTIVE

To find out which factors influence outcome after a fractured hip, so that the optimum treatment may be chosen for each patient.

DESIGN

Prospective cohort study.

SETTING

3 teaching and 2 rural hospitals, The Netherlands.

SUBJECTS

215 patients aged 55-102 years (median 82) who presented with a fractured hip during 1994.

INTERVENTIONS

Interviews shortly after the injury and 4 and 12 months later, study of radiographs, and evaluation of casenotes.

MAIN OUTCOME MEASURES

Mobility and functional recovery.

RESULTS

38 patients had died by the 4-month follow up, at which time 64/177 (36%) had regained the level of mobility that they had before the injury. At 12 months the figure was 58/148 (39%). The corresponding figures for functional recovery were 52/177 (29%) and 36/148 (24%). Factors that militated against recovery were increasing age, coexisting diseases, general complications and local complications.

CONCLUSIONS

The chance of a patient with a hip fracture making any further recovery after 4 months is minimal. Local complications are the most important risk factor.

[Methicillin-resistant Staphylococcus aureus in medical and paramedical personnel returned from work in a foreign hospital]

The cultures of two patients of the Surgical Intensive Care Unit (IC) of the Medical Centre of Utrecht University were found positive for methicillin-resistant Staphylococcus aureus (MRSA). A male nurse turned out to be the source, 4 months after his return from working in an English hospital. Cultures were, by mistake, not taken directly on arrival from abroad. Pulsed-field gel electrophoresis proved MRSA strains from both source and the 2 patients to be identical to a strain which was epidemic in Great Britain but had never occurred in the Netherlands. The IC has meanwhile been closed; at source investigation, 14 other patients and six staff members were found MRSA-positive. The policy in the hospital is to screen health care workers for MRSA carriership on return from an hospital abroad. The success of the policy depends strongly on the cooperation of health care workers in this matter.

[Biodegradable implants in fracture fixation: state of the art]

Operative fracture repair in trauma surgery is currently performed using metal implants. These metal implants often are removed during a second, retrieval operation. Biodegradable fracture fixation devices have been used clinically since the late seventies. Most bioresorbable implants are manufactured from polymers. The polylactides, polyglycolides and co-polymers slowly degrade into small components that are excreted from the human body via natural pathways and removal operations after fracture surgery are not necessary. Due to the limited mechanical properties, the polymer screws and pins are mostly used in the treatment of non weight-baring simple fractures of the ankle, elbow, hand and foot. In view of the progressing technical developments, new materials will be developed and tested for clinical use in the coming decades.

Twelfth rib resection: a direct posterior surgical approach for subphrenic abscesses

OBJECTIVE

To assess the results of twelfth rib resection as a direct posterior surgical approach to subphrenic abscesses in case of failure of percutaneous drainage, abandonment of percutaneous drainage in view of a too high risk of perforation of adjacent organs, or contamination of the pleural space, or an inaccessible abdomen.

DESIGN

Retrospective study.

SETTING

University hospital, The Netherlands.

PATIENTS

17 patients who required rib resection for subphrenic abscesses that developed after infected necrotising pancreatitis, splenectomy, or anastomotic disruption.

INTERVENTIONS

18 rib resections.

MAIN OUTCOME MEASURES

Outcome and morbidity.

RESULTS

Twelfth rib resection was successfully in 13 of 17 patients. Four patients died from multiple organ failure despite subsequent (re) laparotomies for additional surgical drainage.

CONCLUSION

Twelfth rib resection can be useful for the treatment of subphrenic abscesses in selected patients.

[The operating room of the future]

Advances in computer technology will revolutionize surgical techniques in the next decade. The operating room (OR) of the future will be connected with a laboratory where clinical specialists and researchers prepare image-guided interventions and explore the possibilities of these techniques. The virtual reality is linked to the actual situation in the OR with the aid of navigation instruments. During complicated operations the images prepared preoperatively will be corrected during the operation on the basis of the information obtained peroperatively. MRI currently offers maximal possibilities for image-guided surgery of soft tissues. Simpler techniques such as fluoroscopy and echography will become increasingly integrated in computer-assisted peroperative navigation. The development of medical robot systems will make possible microsurgical procedures by the endoscopic route. Tele-manipulation systems will also play a part in the training of surgeons. Design and construction of the OR will be adapted to the surgical technology, and include an information and control unit where preoperative and peroperative data come together and from where the surgeon operates the instruments. Concepts for the future OR should be regularly adjusted to allow for new surgical technology.

[Fewer x-rays while maintaining quality of clinical care using clinical protocols for physical diagnosis of ankle injuries]

OBJECTIVE

To determine whether it is possible to decrease the number of X-rays in acute ankle injury while keeping the health care constant, using a scoring system.

DESIGN

Prospective.

METHOD

Patients presenting in the emergency department of the University Hospital Utrecht (AZU), the Netherlands, over a one-year period of time with acute ankle injuries were subjected to a thorough physical examination based on a scoring system developed at Leiden University Hospital. The score was calculated and X-ray examination was indicated when this score was > or = 8 points. Radiological investigation or telephone interviews six weeks after injury achieved verification of the clinically relevant ankle fractures. Specificity and sensitivity were calculated from every possible cut-off point and drawn in a 'receiver operating characteristics' (ROC) curve.

RESULTS

Of the 514 patients included 81 patients had a score of 8 or higher and 24 of them had a clinically relevant fracture. In 34 patients an ankle X-ray was made although their score was < 8 points. The positive and negative predictive values of the system were 30% (95% confidence interval (95% CI): 20-41) and 99% (95% CI: 97-100) respectively. The score yielded an area under the ROC curve of 91% (95% CI: 84-98). A cut-off point of 8 led to a reduction of X-rays by 60% (using the 'Ottawa ankle rules' the decrease in this population would have been 28%). On the other hand, 5 clinically relevant fractures were missed.

CONCLUSION

Radiological examination in patients wit acute ankle complaints was reduced while health care remained almost constant. In the AZU, a decision was made for a major reduction in X-rays while accepting that some fractures would be missed.

Open management of the abdomen and planned reoperations in severe bacterial peritonitis

OBJECTIVE

To assess the results of open management of the abdomen and planned re-operations in severe bacterial peritonitis after perforation or anastomotic disruption of the digestive tract.

DESIGN

Retrospective study.

SETTING

University Hospital, The Netherlands.

SUBJECTS

67 consecutive patients.

INTERVENTIONS

Open management of the abdomen and planned reoperations.

MAIN OUTCOME MEASURES

Hospital morbidity and mortality, long-term follow-up.

RESULTS

38 patients developed multiple organ failure (MOF), but 29 needed only ventilatory and inotropic support. The mean number of re-operations was nine. 16 patients developed severe bleeding and 16 fistulas. In-hospital mortality was 42% (n = 28). Long-term morbidity, particularly the number of abdominal wall defects (n = 10), was considerable.

CONCLUSION

Despite open management of the abdomen and planned re-operations, mortality of severe bacterial peritonitis still continues to be too high, and both short and long-term morbidity are appreciable. The value of open management of the abdomen and planned re-operations rests only on the clinical observation that other conventional surgical treatments of severe bacterial peritonitis often fail.

Surgical management of severe secondary peritonitis

BACKGROUND

Despite advances in diagnosis, surgery, antimicrobial therapy and intensive care support, the mortality rate associated with severe secondary peritonitis remains unacceptably high. This article presents various surgical treatment strategies for severe secondary peritonitis, emphasizing the role of open management of the abdomen and planned relaparotomies.

METHODS

Material was identified from previous review articles, references cited in original papers and a Medline search of the literature.

RESULTS AND CONCLUSION

Surgical treatment of severe secondary peritonitis is highly demanding and very complex. The combination of improved surgical techniques, antimicrobial therapy and intensive care support has improved the outcome of such peritonitis following perforation or anastomotic disruption of the digestive tract, or infected necrotizing pancreatitis. However, aggressive surgical treatment strategies, such as open management of the abdomen and planned relaparotomies, may have reached their limits.

[Intra-osseus gas formation in osteomyelitis of vertebrae and pelvis by Klebsiella pneumoniae]

A 59-year-old woman had persistent sepsis after abdominal operations because of a volvulus and subsequently a retroperitoneal abscess, in spite of antibiotic treatment against Klebsiella pneumoniae, which grew in blood cultures. During abscess drainage, a haemorrhage from the infrarenal part of the aorta had occurred; in view of a presumed aortitis this part had been replaced by a bifemoral bypass. Computer tomography revealed intraosseous formation of gas in vertebrae and pelvis. At operation, abscesses were drained and necrotomy and sequestrotomy of the bone were performed. Cultures of the pus from the iliac crests showed K. pneumoniae. The antibiotic management was changed; the wounds were flushed regularly. After exposure of the wounds still draining after 6 months and vascular surgery because of occlusion of the bypass after 7 months, the patient recovered well. She died 2 years later from a cerebral haemorrhage.

Staged operative treatment in a septic patient with an infected, unstable pelvis, and a missed bladder rupture

This case demonstrates once again the potential and serious complications of pelvic fractures, especially when associated urogenital injuries are missed. Missing the bladder rupture proved almost fatal to our patient. Second, it was confirmed that in very unstable pelvic fractures, external fixation alone does not provide enough stability. Local stability is the cornerstone in the treatment of (bone) infection, and in these cases, maximal stability is only obtainable with internal fixation. The advantages of metal implants in infected areas outweigh the disadvantages by far. For the bladder-rupture, we chose a two-stage approach. First, we performed a urinary diversion, to avoid surgical closure of the infiltrated bladder wall. All cavities, including the open bladder, were packed with omentum to fill the dead space with highly vital tissue to offer stout resistance to infection. Two years later, with the patient in excellent physical condition, urinary undiversion was carried out. Ultimately physical and social recovery was complete.

[Good results from circumcisions of Muslim boys performed outside the hospital]

OBJECTIVE

To describe the experience with circumcision of Moslem boys under local anaesthesia outside the hospital.

DESIGN

Prospective, descriptive.

METHOD

A total of 94 circumcisions under local anaesthesia were performed from April through November 1997 in a Health Centre of the Municipal Health Service, Utrecht, the Netherlands. Pain and unrest of the boys were scored on a scale from 1 to 10 by the operating surgeon (1 = no pain/patient fully calm; 10 = unbearable pain/patient in panic). Postoperative follow-up was only done on request of the parents/fosterers. The reasons for these follow-ups were recorded. One week after the circumcision the parents/fosterers were asked if there were any complications and whether they were satisfied with this method.

RESULTS

The median age was 3 years (range: 2-24). The pain during the operation was scored by the surgeon with a median of 1 (1-6) while unrest scored a median of 3 (1-9). Thirteen children were seen again because of bleeding (n = 4), haematoma (n = 2), swelling (n = 7). One week after the operation 89% of 70 parents/fosterers interviewed by telephone were content with the treatment. The social aspect of this way of circumcision was much appreciated.

CONCLUSION

Circumcisions under local anaesthesia outside the hospital are feasible. Complications were according to published figures and most parents were content. With this procedure a cost reduction of 70% may be achieved in comparison with clinically performed circumcision under general anaesthesia.

Predictors of recurrence of fulminant bacterial peritonitis after discontinuation of antibiotics in open management of the abdomen

OBJECTIVE

To assess a scoring system for predicting recurrence of fulminant bacterial peritonitis after discontinuation of antimicrobial treatment in patients being treated by open management of the abdomen for persistent bacterial peritonitis after perforation of the digestive tract, anastomotic disruption, or necrotising pancreatitis.

DESIGN

Retrospective study.

SETTING

University Hospital, The Netherlands.

SUBJECTS

58 consecutive patients.

MAIN OUTCOME MEASUREMENTS

Recurrence of fulminant bacterial peritonitis and survival.

RESULTS

13 of the 58 patients (22%) died during the initial course of antimicrobial drugs. 14 of the remaining 45 patients had a recurrence of fulminant bacterial peritonitis after discontinuation of antimicrobial drugs, 4 of whom died. Predictive criteria included raised white cell count (WCC) (p = 0.02), duration of initial antibiotic treatment (p = 0.05), and deterioration in Simplified Acute Physiology Score (p = 0.05). Using the WCC and the duration of initial antimicrobial treatment together with other variables that showed a predictive trend (body temperature, percentage band cells, underlying disease, and use of inotropic agents), in a new scoring system (0-12), fulminant bacterial peritonitis did not recur when the score was 0-3, but in 9 of 11 patients with a score of 6 or more it did (p < 0.001).

CONCLUSION

Patients at increased risk of recurrence of fulminant bacterial peritonitis during open management of the abdomen can be identified at the time of discontinuation of antimicrobial treatment by a new scoring system; antimicrobial treatment should not be discontinued in patients with a score of 6 or more.

Hypothermia in trauma patients

Accidental hypothermia (AH) can be defined as an unintentional decrease in core temperature below 35 degrees C during cold exposure by individuals without intrinsic thermoregulatory dysfunction. Pathophysiological changes can be attributed both to the severity of hypothermia and to co-morbid factors such as trauma, submersion, intoxication and underlying diseases. In trauma victims stratified according to the Injury Severity Score, the factor hypothermia is considered to be a poor prognostic sign for survival. In these patients rewarming therapy should be applied as soon as possible. In the Utrecht University Hospital, adult patients with AH are managed according to an algorithm based on their presenting hemodynamic conditions. Patients with perfusing cardiac rhythms and systolic pressures over 80 mmHg will receive continuous arteriovenous rewarming (CAVR). Arrested and hemodynamically instable patients are treated with cardiopulmonary bypass (CPB). In a 3-year period, 22 patients with AH were admitted to the emergency department. Fourteen patients had a trauma as the cause of hypothermia. Twenty patients were treated according to the algorithm (CAVR n = 18, CPB n = 2) and two patients were alternatively managed. Mortality in the CAVR group was 28% and total mortality reached 32%. Complications of CAVR are related to placement and removal of vascular catheters and may be severe in these patients with impaired coagulation. CAVR permits a good access to the (trauma-) patient and rewarming can be continued synchronously with diagnosis and treatment of various injuries.

Improved results in treatment of femoral shaft fractures with the unreamed femoral nail? A multicenter experience

OBJECTIVES

The first studies of intramedullary nailing with the Arbeidsgemeinschaft fur Osteosynthesefragen (AO) unreamed femoral nail in selected clinics showed favorable results. Daily practice, however, is that femoral fractures are treated in a variety of clinics by a mixture of surgeons. To evaluate whether similar results could be obtained in general practice, a prospective multicenter trial was undertaken, involving a variety of university and general hospitals in one country.

METHODS

Between August of 1994 and June of 1996, 122 patients with 129 traumatic femoral shaft fractures treated with the unreamed femoral nail in eight hospitals were included in this study. Patients who had a reoperation with an unreamed femoral nail or patients with a pathologic fracture of the femur were excluded from this part of the study. Of these patients, 58 patients had multiple injuries, and 33 of the fractures had open soft-tissue injury.

RESULTS

Postoperative infection occurred in four patients; the nail broke in one patient. In total, nine patients (6.6 %) sustained general complications, five of which developed adult respiratory distress syndrome (3.6%). Non-union occurred in seven patients (5.1%) and delayed union occurred in four cases (2.9%) with a reintervention rate of 6.6%.

CONCLUSION

In this study, a decrease in the number of patients who develop adult respiratory distress syndrome through the use of a thin unreamed nail could not be demonstrated. The promising early callus formation and good consolidation mentioned in previous studies could not be confirmed. We find that the technical and clinical results in this study of unreamed femoral nailing in a mixture of clinics and by a variety of surgeons are comparable to the results of reamed nailing in the literature and are not as favorable as in the previous reports.

[Clenched fist injuries from teeth: not to be disregarded]

During the delivery of a blow to the jaw, two men, 33 and 34 years of age, suffered an injury at the level of the right metacarpophalangeal joint in, respectively, the 4th and 3rd digit. In both cases, purulent arthritis and destruction of the MCP-joint developed. Clenched-fist injuries are known for their severe complications such as septic arthritis, osteomyelitis and persistent infection leading to amputation. These complications are due to the easy perforation of the MCP-joint capsule and the fact that the patients do not seek medical treatment until a significant inflammatory process has developed. Exploration of the wound on a flexed hand is crucial to exclude perforation of tendon, joint and bone. The wound should be left open to avoid infections. In case of infections, which can be caused by a variety of aerobic and anaerobic bacteria, the recommended treatment is immediate debridement and administration of broad-spectrum antibiotics.

[Bilateral dislocation fracture of the head of the humerus. Arthroplasty and/or arthrodesis]

Functional recovery after bilateral comminuted fractures of the humeral head with posterior dislocation is poor. When reposition and internal fixation fail, the remaining alternatives are (hemi)arthroplasty and/or arthrodesis. In a 50-year-old patient, we treated the dominant shoulder by arthrodesis; a Neer prosthesis was inserted at the other side. Using this strategy, the advantages of both techniques were combined with an acceptable functional recovery, which ist especially important for young and active patients.

[Feeding tubes for tube feeding]

Several techniques are available for the provision of enteral nutritional support. Nasal tubes, gastrostomy tubes and jejunostomy tubes can be distinguised. Nasal tubes are used for short-term support, gastrostomy tubes (preferably via a percutaneous endoscopic gastrostomy) for long-term support (over 4 to 6 weeks), while (needle catheter) jejunostomy tubes are most often used to provide early enteral nutrition immediately after operations on the proximal gastrointestinal tract. The most frequent complications are: with the nasal tube dislodging, clogging and aspiration, with the gastrostomy tube peristomal infection and with the jejunostomy tube, obstruction. It should further be noted that the quantity of enteral nutrition prescribed and that actually administered may differ substantially so that patients with a feeding device may even become malnourished. With proper patient selection and secure control of the energy balance, feeding tubes are simple (temporary) devices that improve the patient's health and quality of life.

Percutaneous endoscopic gastrostomy for patients with severe cerebral injury

Early enteral nutrition improves the outcome of severely injured patients. To provide enteral nutrition, various methods are available. In a restrospective study we analysed the outcome of 24 severely traumatized patients (mean ISS = 44), in whom a percutaneous endoscopic gastrostomy (PEG) was used for enteral nutrition. All patients had been admitted to the intensive care unit with major cerebral injury. The mean duration of intensive care treatment and the in hospital stay were 28 and 71 days, respectively. PEG was introduced 14 days after hospital admittance. Enteral nutrition through the PEG was administered for 45 days. Four patients died, 8 patients were discharged from the hospital while being fed via the PEG and 12 patients resumed normal feeding and the PEG was removed. Three severe complications occurred; 1 patient aspirated massively and died; in 2 patients intra-abdominal leakage of the enteral nutrition occurred. Both patients recovered from this complication. We conclude that because of the advantages of early enteral nutrition on the one hand and the drawbacks of nasogastric feeding tubes on the other, in injured patients with severe cerebral damage, PEG placement is justified, despite the risk of complications.

Prognostic scoring systems to predict outcome in peritonitis and intra-abdominal sepsis

BACKGROUND

Early classification of patients presenting with peritonitis and intra-abdominal sepsis by means of objective scoring systems is desirable to select patients for 'aggressive' surgery and to compare results of different treatment regimens. However, none of the existing scoring systems has fulfilled all expectations.

METHODS

Evaluation of the value of various scoring systems (Acute Physiology And Chronic Health Evaluation (APACHE) II, Simplified Acute Physiology Score, Sepsis Severity Score, Multiple Organ Failure, Mannheim Peritonitis Index (MPI), Ranson and Imrie) was performed in 50 patients. Additionally, scoring systems were combined to obtain a 'combined score' for the prediction of peritonitis-related in-hospital death. Hazard ratios were calculated in a univariate and multivariate analysis.

RESULTS

In the univariate analysis all scoring systems, except Ranson and Imrie, predicted the primary outcome. In the multivariate analysis, only the APACHE II score (hazard ratio 6.7) and the MPI (hazard ratio 9.8) contributed independently to the prediction of outcome. All patients with an APACHE II score of 20 or more and a MPI of 27 or more died in hospital.

CONCLUSION

Combination of the APACHE II and the MPI provides the best scoring system fitting clinical goals.

[Three patients with accidental hypothermia: customized rewarming]

Three patients, two men aged 47 and 33 years and a woman aged 33 years, became hypothermic after an accident with body temperatures of 34.5, 26.2 and 23.1 degrees C, respectively. Two of them developed circulatory disorders, for which reanimation was performed. All three patients recovered after active external heating using among other things warmed infusion fluids, a warmed waterbed, continuous arteriovenous rewarming and rewarming with the heart-lung machine. For the treatment to be successful, the type of rewarming selected should be guided by the degree of hypothermia, the circulatory situation and the severity of the accessory injuries.

Subfascial plate fixation of comminuted diaphyseal femoral fractures: a report of three cases utilizing biological osteosynthesis

Internal fixation with preservation of tissues and vascularization, as in intramedullary fixation and bridging plate osteosynthesis, so-called biological osteosynthesis, has become increasingly popular. Our experiences, in three patients, using a technique of internal fixation of comminuted diaphyseal femoral fractures with an AO plate in subfascial position without exposure of the fracture site is presented. Though based on unorthodox mechanical principles, the safety and efficacy of bridging plates, even when applied in unusual situations, are illustrated.

[Good results of fasciotomy in chronic compartment syndrome of the lower leg]

OBJECTIVE

To assess the results of fasciotomy in patients with a chronic compartmental syndrome.

DESIGN

Retrospective study.

SETTING

Department of Surgery, Central Military Hospital, Utrecht, the Netherlands.

METHOD

Closed fasciotomy was performed in 81 patients (151 compartments) after standardized measurement of the pressure of the symptomatic compartment during exercise. The anterior compartment was affected 149 times and the lateral compartment twice. The pressure reading was repeated at least 3 months after the operation. All operated patients 6 months postoperatively were sent a written questionnaire inquiring about the results of the operation.

RESULTS

Postoperative complications included a neurinoma (3 times) and a seroma (once). The mean postoperative intramuscular pressures were lower than the preoperative ones: the pressure at rest fell from 22.1 to 14.0 mm Hg (p < 0.05), the exercise pressure from 57.5 to 25.4 mm Hg (p < 0.01) and the relaxation pressure from 34.4 to 25.2 mm Hg (p < 0.05). Ten patients had an unchanged increased pressure after the operation, for which a second fasciotomy was performed 4 times. Attenuation of symptoms was reported by 59 patients (76%). Nine patients with poor results had already had a combination with some other hyperpressure injury before the operation.

CONCLUSION

Closed fasciotomy in a demonstrated chronic compartmental syndrome in most cases gave good results, viz. attenuation of symptoms and a decrease of the intramuscular pressure, especially after exercise.

Condylar plate fixation of subtrochanteric femoral fractures

We describe our experiences in 40 consecutive patients with subtrochanteric fractures treated with an AO 95 degrees condylar blade plate. Three patients died early due to multiple injuries. One patient developed a delayed union which ultimately resulted in repeated plate fractures due to fatigue. All other fractures heated despite deep postoperative wound infection in three cases. Based on our favourable results, we consider the condylar blade plate fixation of subtrochanteric fractures to be an excellent method, especially if an image intensifier and/or fracture table are not available.

[Differentiated protocol for the conservative/surgical treatment of ankle fractures in adults]

OBJECTIVE

Evaluation of the long-term results of protocol treatment of adult patients with ankle fractures.

SETTING

St Elisabeth Hospital, Tilburg, the Netherlands.

DESIGN

Retrospective long-term follow-up study.

METHOD

All patients (n = 579) with an ankle fracture (580 fractures) in the period 1985-1989, who had not died soon after the injury and in whom the morbidity was not caused mainly by other conditions (n = 30) were treated according to a protocol which specified the indications for conservative or surgical therapy depending on the particular fracture type. After a median follow-up period of 5 years (range: 2.25-8.17 years) the treatment results could be evaluated in 92% of the patients.

RESULTS

Clinically "good' or "excellent' results ranging from 79-90.5% types A, B and C fractures (according to the Swiss Arbeitsgemeinschaft für Osteosynthesefragen) were achieved.

CONCLUSIONS

A broad indication for conservative, even functional (tape bandaging) treatment and restricted use of implants during osteosynthesis appear justified considering the results obtained.

Evaluation of the Singh index for measuring osteoporosis

We studied the reliability of the Singh classification of trabecular bone structure in the proximal femur as a measure of osteoporosis, using kappa statistics. Radiographs of fractures of the femoral neck or trochanteric region in 80 consecutive patients were assessed by six observers. The interobserver variation was large; only three of 72 radiographs were given the same classification by all six observers and the kappa values ranged from 0.15 to 0.54. the intraobserver variation showed substantial strength of agreement; kappa values ranged from 0.63 to 0.88. In 77 patients dual-energy X-ray absorptiometry was used to measure bone mineral density. The results were compared with those of the Singh classification: we found no correlation.