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PubMed1982

Impeded coronary flow in anatomic correction of transposition of the great arteries: prevention, detection, and management.

Six infants and a 3-year-old boy underwent primary anatomic repair (arterial switch) of their dextro-transposition of the great arteries (d-TGA). Three died: one on the operating table because of an irreducible kink in the left main coronary artery, one because of postoperative bleeding and tamponade, and one because of a postoperative management error. In the four survivors the preoperative left ventricular-to-right ventricular systolic pressure interrelationships were 35 to 115, 54 to 73, 30 to 80, and 70 to 90 mm Hg. While left ventricular inability to take over the systemic pressure did not appear to be a problem in any of our cases, reduced coronary perfusion seemed to be the rule rather than the exception in this operation. One approach to the problem of obstructed coronary flow is first to construct continuity of the "new" aorta, unclamp it, and mark the appropriate places for coronary anastomoses on the fully distended aorta. It is our conviction that further improvement in the operative technique and better understanding of the risk factors will eventually make the primary anatomic repair of d-TGA the operation of choice for most dextro-transpositions.

Child, Preschool↗
PubMedDate not supplied

[Levels of "waste" halothane in operating rooms at gynecologic and obstetrical clinics--preliminary results].

INTRODUCTION: Medical staff working in surgical wards of hospitals, people that work on transport or storaging of gases and liquids, employees working on gas tanks and gas installations, mechanics for anesthetic devices and employees in the process of production of these substances are professionally exposed to anesthetic gases or and fumes that are released in their working environment. It has been confirmed that there were some deviations of indicators of the liver function after a long term exposure of the medical staff (surgeons, anesthesiologists, instrument nurses and anesthetists) to halothane and it has been notified that the level of wasted-halothane in the indoor air of the surgical theaters should be measured in order to get a correct and complete evaluation of the professional risk. The term "wasted-halothane" in this research means fumes of halothane that leave a closed circle: anesthetic device--respiratory organs (patient)--indoor air of the workplace (operating room). MATERIALS AND METHODS: Tests were done in the theaters of the surgical wards of the Department of Gynecology and Obstetrics of Novi Sad. During the testing period no ventilation system was used in any of the theaters. Tested groups included anesthesiologists, instrument nurses and anesthetists who were the members of the surgical team. Tests have not been done on same individuals, but the same workplace. Samples were taken using the "individual sample" method from the breathing zone of the tested person using a rubber pipe fixed on the shoulder. Pumps (personal samplers--"Casella") were set to absorb 0.2 liters of air per minute. Laboratory analyses of these samples were done using a method of desorption of the halothane fumes from the active coal with benzyl-alcohol, and their evaluation on gaschromatograph (Electron-Capture-Detector). The threshold Limit Value (TLV) of halothane fumes at the workplace is 40 mg/m3. RESULTS: During three days of sampling 32 samples of indoor air were taken from the surgical wards of the Department. 30 samples were taken in the surgical theaters, one in the hall between surgical theaters, and one in the room for rest of the staff. Concentration of halothane fumes in the theatre No 1 was between 6.9 mg/m3 and 27.31 mg/m3 in anesthetists, between 33.08 mg/m3 and 37.62 mg/m3 in anesthesiologists and between 6.9 mg/m3 and 27.31 mg/m3 in instrument nurses. At the theatre No 2 concentration of halothane fumes was between 31.27 mg/m3 and 37.9 mg/m3 in anesthetists, between 3.56 mg/m3 and 91.7 mg/m3 in anesthesiologists and up to 95.5 mg/m3 in instrumenting nurses. Concentration of halothane fumes in the theatre No 3 were between 4.19 mg/m3 and 17.18 mg/m3 in anesthetics, between 6.23 mg/m3 and 37.62 mg/m3 in anesthesiologists and between 8.27 mg/m3 and 12.33 mg/m3 in instrument nurses. In the hall between these surgical theaters the concentration was 3.02 mg/m3 and 0.28 mg/m3 in the room for rest. DISCUSSION: Halothane fumes were present in the atmosphere of the working environment in significant quantities at all tested places Especially indicative were the results that showed that the concentration of halothane fumes in the theatre No 1, at the end of surgical operational program, was much higher than at the beginning, and what is even more important it was much higher than those in TLV in anesthesiologists and instrument nurses (more than twice higher). The differences of concentrations between specific occupations within the surgical team were also significant. Our results show that the most exposed were anesthesiologists and instrument nurses, who spent most time nearby the operation table. The anesthetists were much less exposed, due to the fact that they are assistants that often leave the surgical theater during the surgical interventions. Indicators illustrate that the increase of the concentration of halothane fumes depends on the length the surgical theaters were used. It shows an increase of halothane fumes co

Air Pollutants↗
PubMed1977

[Muscular malformation of the wrist in an initial carpal tunnel syndrome. Clinical case].

A carpal canal syndrome in a young female subject was found at the operating table to be due to a wrist muscle abnormality. An extra muscle leaving the styloid process of the radius in the direction of the transverse ligament of the carpus, and an abnormal distal development of the muscular belly of the superficial flexor of the third finger, had led to compression on the median nerve corresponding to the carpal canal. Check on motor and sensitive conduction of the median nerve revealed nerve damage at wrist level. Removal of the extra muscle and section of the transverse ligament of the carpus resolved the painful symptomatology. Control of nervous conduction two months after operation confirmed the improvement.

Adult↗
PubMed1997

Liver transplantation: review of the literature. Part 1: Anatomic features and current concepts.

The first attempted human orthotopic liver transplantation, in 1963, involved a child with biliary atresia, who died on the operating table as a result of uncontrollable coagulopathy. Improvements in immunosuppression, surgical technique, medical imaging and postoperative care, as well as more stringent patient selection, have allowed the development of liver transplantation and its universal acceptance as the treatment for a variety of liver diseases. The radiologist plays a major role in the multidisciplinary transplantation team and must be familiar with each stage of orthotopic liver transplantation and its associated complications. In the first article of this series, the author reviews the anatomic features and current concepts relevant to orthotopic liver transplantation. Future articles will discuss the vascular, biliary and medical complications of the operation.

Anastomosis, Surgical↗
PubMed2003

The internal obturator muscle may cause sciatic pain.

Six patients suspected to have piriformis syndrome were operated in the hip region in an attempt to relieve pressure on the sciatic nerve. The piriformis muscle and tendon as well as their relationship to the sciatic nerve were found to be normal. However, the internal obturator muscle was found to be very tense, slightly hyperaemic and pressing the sciatic nerve. During Lasegue's testing on the operating table the internal obturator and not the piriformis muscle impinged on the nerve at an early stage in the hip flexion movement. A sectioning of the tendon to the internal obturator muscle near its insertion at the trochanter was performed. Median pain score was found to be reduced from the preoperative value (8.5) to that at 6 weeks (3.5) (P<0.05) and 3 (3.5) (P<0.05) and 6 months (5.5) (N.S.) postoperatively. No significant reduction of pain was found in a control group of six patients followed during the same period. Three patients who needed opioids preoperatively managed without such drugs 6 months after the operation. Two patients in the operated group were at work 50 and 100% after having been out of work for 3 and 10 years, respectively.

Adult↗
PubMedDate not supplied

[Optimizing primary total hip replacement--a technique to effect saving of manpower].

PURPOSE: Development of a standardized surgical technique for total hip replacement thereby saving manpower (one assistant) by using a retractor system. METHOD: Total hip replacement is performed with the patient in a true lateral position on a tunnel cushion. By means of a direct lateral approach the pelvitrochanteric muscles are partially detached using an omega-shaped cut. The Bookwalter retractor is fixed dorsally on the operating table. The ring is centered keeping the greater trochanter in the middle. The Hohmann retractors are fixed to the ring to sufficiently expose the acetabulum. To insert the femoral stem the ring needs to be opened dorsally and the patient's leg is bent 90 degrees in the hip and the knee over the tunnel cushion. The muscles inserting at the greater trochanter are retracted by a separate Hohmann retractor with weight. In a case control study with matched pairs the patients treated with this technique were compared with those treated in supine position with the transgluteal approach. The number of assistants required and the operating time were assessed. RESULTS: All the hip replacements with the patient in side position were performed with one assistant, in supine position with two assistants. The operating time did not differ significantly (supine position 110 min/side position 112 min). The complication rate in both groups was comparable (one secondary wound healing, one transient ischalgia). CONCLUSION: The process of total hip replacement can be optimized. The described technique allows to spare one surgical assistant without prolonging the operating time.

Appointments and Schedules↗
PubMed1995

[Thoracic trauma].

From January 1989 to December 1992, in the Institute of Clinical Surgery of the University of Perugia, 102 patients were admitted for thoracic trauma. Two patients with an open thoracic trauma, both presenting multiple shot-wounds, underwent an explorative thoracotomy. One of them died on the operating-table from hemorrhage, while the other was saved by a wedge-resection. A 3rd explorative thoracotomy was successfully performed on a patient with internal thoracic trauma and severe hemothorax. Among the 100 patients with an internal thoracic trauma, mortality was 6%, but only one of the 6 deceased, had no lesions other than a fail chest. As a matter of fact 38 patients presented lesions in other parts of the body. Simple and complicated multiple costal fractures, found in 84 cases, were the most frequent lesions observed. Seventeen of the 38 patients with pneumothorax and/or pleural effusion had a chest tube applied. Three patients were operated for a diaphragmatic hernia with a positive outcome. Only 75 patients received medical treatment without surgery. Six of the patients with multiple costal fractures presented flail chest. One of them (mentioned above) died almost immediately after his admission and therefore received no more than the initial medical treatment. Four others, aged over 65, successfully underwent a costal osteosyntesis, while the 6th patient received medical therapy with a positive outcome. In the case of a critical flail chest with severe patho-physiological consequences, if the fractures are in technically favourable sites, the Authors believe it is better to immediately stabilize the thorax, since the operating trauma is minimum and in many cases the patient is already intubated and curarized.

Adult↗
PubMedDate not supplied

[Single coronary artery originating from the left pulmonary artery of a "truncus arteriosus communis" in a living 39 year-old-patient (author's transl)].

Observation of a single coronary artery with origin from left pulmonary artery in a 39 year-old man who was brought to the operating table for correction of a persistent truncus arteriosus is discussed. The anomaly is expectional and has never been described intra vitam. The authors explain the possible formal genesis on the basis of the most accepted embriogenetic theories and they analyze the special physiopathological behaviour which allowed the long survival and the good physical state of the patient which is still only slightly reduced. In this case a precedent cerebral abscess and frequent hemophtysis indicated the surgical treatment of the truncus arteriosus which was nor performed because of the finding of the coronary anomaly not previously seen with angiography. The authors emphasize the necessity of an accurate pre-operative study of the coronary tree in all patients with persistent truncus arteriosus, to avoid the possibility that anomalies of the origin and course of the coronary arteries can make radical surgical treatment difficult or impossible.

Adult↗
PubMedDate not supplied

Paraplegia from operating position and spinal stenosis in non-spinal surgery: a case report.

A 61-year-old patient with pre-existing but asymptomatic spinal stenosis was placed in the lateral position on the operating table for hip surgery. The lumbar spine was in a position of extension and lateral bend. This position, combined with severe spinal stenosis (proven later at surgery), caused enough compression on the neural elements to produce permanent paraplegia. Similar cases have been reported but remain an infrequent cause of postoperative paraplegia.

Constriction, Pathologic↗
PubMed2000

Does the endovascular repair of aortoiliac aneurysms pose a radiation safety hazard to vascular surgeons?

OBJECTIVES: Endovascular aortoiliac aneurysm (EAIA) repair uses substantial fluoroscopic guidance that requires considerable radiation exposure. Doses were determined for a team of three vascular surgeons performing 47 consecutive EAIA repairs over a 1-year period to determine whether this exposure constitutes a radiation hazard. METHODS: Twenty-nine surgeon-made aortounifemoral devices and 18 bifurcated devices were used. Three surgeons wore dosimeters (1) on the waist, under a lead apron; (2) on the waist, outside a lead apron; (3) on the collar; and (4) on the left ring finger. Dosimeters were also placed around the operating table and room to evaluate the patient, other personnel, and ambient doses. Exposures were compared with standards of the International Commission on Radiological Protection (ICRP). RESULTS: Total fluoroscopy time was 30.9 hours (1852 minutes; mean, 39.4 minutes per case). Yearly total effective body doses for all surgeons (under lead) were below the 20 mSv/y occupational exposure limit of the ICRP. Outside lead doses for two surgeons approximated recommended limits. Lead aprons attenuated 85% to 91% of the dose. Ring doses and calculated eye doses were within the ICRP exposure limits. Patient skin doses averaged 360 mSv per case (range, 120-860 mSv). The ambient (> 3 m from the source) operating room dose was 1.06 mSv/y. CONCLUSIONS: Although the total effective body doses under lead fell within established ICRP occupational exposure limits, they are not negligible. Because radiation exposure is cumulative and endovascular procedures are becoming more common, individuals performing these procedures must carefully monitor their exposure. Our results indicate that a team of surgeons can perform 386 hours of fluoroscopy per year or 587 EAIA repairs per year and remain within occupational exposure limits. Individuals who perform these procedures should actively monitor their effective doses and educate personnel in methods for reducing exposure.

Aortic Aneurysm↗
PubMed1996

Management of rigid post-traumatic kyphosis.

STUDY DESIGN: Rigid post-traumatic kyphosis after fracture of the thoracolumbar and lumbar spine represents a failure of initial management of the injury. Kyphosis moves the center of gravity anterior. The kyphosis and instability may result in pain, deformity, and increased neurologic deficits. Management for symptomatic post-traumatic kyphosis always has presented a challenge to orthopedic surgeons. OBJECTIVES: To evaluate the surgical results of one stage posterior correction for rigid symptomatic post-traumatic kyphosis of the thoracolumbar and lumbar spine. SUMMARY OF BACKGROUND DATA: The management for post-traumatic kyphosis remains controversial. Anterior, posterior, or combined anterior and posterior procedures have been advocated by different authors and show various degrees of success. METHODS: One vertebra immediately above and below the level of the deformity was instrumented posteriorly by a transpedicular system (internal fixator AO). Posterior decompression was performed by excision of the spinal process and bilateral laminectomy. With the deformed vertebra through the pedicle, the vertebral body carefully is removed around the pedicle level, approximating a wedge shape. The extent to which the deformed vertebral body should be removed is determined by the attempted correction. Correction of the deformity is achieved by manipulation of the operating table and compression of the adjacent Schanz screws above and below the lesion. RESULTS: Thirteen patients with post-traumatic kyphosis with symptoms of fatigue and pain caused by slow progression of kyphotic deformities received posterior decompression, correction, and stabilization as a definitive treatment. The precorrection kyphosis ranged from 30-60 degrees, with a mean of 40 degrees +/- 10.8 degrees. After correction, kyphosis was reduced to an average of 1.5 degrees +/- 3.8 degrees, with a range from -5 degrees to 5 degrees. The average angle of correction was 38.8 degrees +/- 10.4 degrees, with a range from 25 degrees to 60 degrees. Significant difference was found between pre- and post-operative kyphosis measures (P < 0.001). The follow-up period for all patients was 2 years, and the average kyphosis angle measured at the moment was 3.8 degrees +/- 3 degrees with a range from -3 degrees to 8 degrees. Substantial overall improvement was achieved in the 13 patients. CONCLUSION: This method provides single-stage posterior decompression, correction, and stabilization on as definitive management for post traumatic kyphosis of the thoracolumbar and lumbar spine.

Adult↗
PubMed1997

Liver transplantation: review of the literature. Part 2: Vascular and biliary complications.

The first attempted human orthotopic liver transplantation, in 1963, involved a child with biliary atresia, who died on the operating table as a result of uncontrollable coagulopathy. Improvements in immunosuppression, surgical technique, medical imaging and postoperative care, as well as more stringent patient selection, have allowed the development of liver transplantation and its universal acceptance as the treatment for a variety of liver diseases. The radiologist plays a major role in the multidisciplinary transplantation team and must be familiar with each stage of orthotopic liver transplantation and its associated complications. In the first article of this series (Can Assoc Radiol J 1997;48[3]:171-178), the authors reviewed the anatomic features and current concepts relevant to orthotopic topic liver transplantation. In this, the second article, they discuss the vascular and biliary complications of the operation, and the third article will cover the medical complications.

Biliary Tract Diseases↗
PubMed2003

Battlefield casualties treated at Camp Rhino, Afghanistan: lessons learned.

BACKGROUND: Operation Enduring Freedom is an effort to combat terrorism after an attack on the United States. The first large-scale troop movement (> 1,300) was made by the U.S. Marines into the country of Afghanistan by establishing Camp Rhino. METHODS: Data were entered into a personal computer at Camp Rhino, using combat casualty collecting software. RESULTS: Surgical support at Camp Rhino consisted of two surgical teams (12 personnel each), who set up two operating tables in one tent. During the 6-week period, a total of 46 casualties were treated, and all were a result of blast or blunt injury. One casualty required immediate surgery, two required thoracostomy tube, and the remainder received fracture stabilization or wound care before being transported out of Afghanistan. The casualties received 6 major surgical procedures and 11 minor procedures, which included fracture fixations. There was one killed in action and one expectant patient. The major problem faced was long delay in access to initial surgical care, which was more than 5 hours and 2 hours for two of the casualties. CONCLUSION: Smaller, more mobile surgical teams will be needed more frequently in future military operations because of inability to set up current larger surgical facilities, and major problems will include long transport times. Future improvements to the system should emphasize casualty evacuation, en-route care, and joint operations planning between services.

Afghanistan↗
PubMed1993

Isocentric stereotactic three-dimensional digitizer for neurosurgery.

A new system has been developed, comprising a frameless isocentric stereotactic mechanism and a three-dimensional (3-D) digitizer for intraoperative spatial monitoring. The 3-D digitizer's multiarticulated arm has three joints related to Cartesian coordinates, two quadrant arcs forming an isocenter system, a microdrive, and a probe holder. The frameless isocentric mechanism is useful for open stereotaxy. Routine CT- or MRI-guided stereotactic surgery is also possible, due to the high level of accuracy of the system. Before surgery, CT and/or MR images are acquired after placing on the scalp three or four external markers. For surgical procedures which require high accuracy, Laitinen's noninvasive CT or MRI localizing markers are used. CT or MR images are entered into a computer using an image scanner, and are stored on a floppy disk. After the patient's head is fixed to the operating table using a Mayfield clamp, the 3-D digitizer is used to read the spatial points and external markers on the scalp or the reference points of Laitinen's localizing markers. During the procedure, the coordinates on the patient's head are automatically entered into the computer and matched with those of the 3-D digitizer and CT/MR images on the CRT display. This system has been used in 22 cases of open craniotomy and 33 cases of burr hole surgery, both carried out using the stereotactic function and the 3-D spatial monitoring function in parallel. Errors in mechanical accuracy of the 3-D digitizer were less than 0.8 mm, and the maximum error during operation was presumed not to exceed 2 mm.

Analog-Digital Conversion↗
PubMed2002

Hand assisted laparoscopic bilateral nephroureterectomy in 1 session without repositioning patients is facilitated by alternating inflation cuffs.

PURPOSE: Transitional cell carcinoma is common and often multifocal in patients with uremia. We report a novel approach of simultaneous laparoscopic bilateral nephroureterectomy without the need to reposition patients. MATERIALS AND METHODS: Seven patients with uremia and organ confined transitional cell carcinoma of the upper urinary tract underwent simultaneous laparoscopic bilateral nephroureterectomy. Inflatable cuffs of an air tourniquet device were placed beneath each side of the back. Alternatively inflating the cuffs and rotating the operation table facilitated position changes during surgery. The incision for the hand assisted device during laparoscopy was also used for resecting the distal ureters in an open manner. Data were compared with those on 7 patients treated with simultaneous open bilateral nephroureterectomy. RESULTS: All laparoscopic bilateral nephroureterectomies were accomplished successfully without complications except for heart failure and atlectasis in a patient with a history of myocardial ischemia. Mean blood loss (218 versus 457 ml.), parenteral narcotic requirement (25 versus 60 mg. morphine equivalent), solid food oral intake (39 versus 83 hours), postoperative hospital stay (9 versus 14 days) and convalescence to normal nonstrenuous activity (3.5 versus 5.4 weeks) were superior in the laparoscopic bilateral nephroureterectomy group. Mean operative time was about 5 hours in each group. CONCLUSION: Our data show that laparoscopic bilateral nephroureterectomy facilitated by inflatable cuffs can be performed at 1 stage with a clear operative field and no repositioning problems.

Adult↗
PubMed2000

Emergency reinstitution of cardiopulmonary bypass following cardiac surgery: outcome justifies the cost.

OBJECTIVE: Crash back on bypass (crash-BOB) is occasionally required in the resuscitation of patients developing life-threatening complications following cardiac surgery. This study aims to determine the incidence, aetiology and cost-effectiveness of such intervention. METHODS: Retrospective review of all crash-BOB patients over 5.5 years at one hospital. RESULTS: The incidence of crash-BOB was 0.8% and occurred at a mean of 7 h post-operatively (range 1 h-20 days). Pre-operative Parsonnet scores were similar to the overall population of patients undergoing surgery in our institution (mean score 10; range 0-45). The original cardiac operations were coronary revascularization (39), valve surgery (12) and others (4). Indications for crash-BOB were cardiac arrest (23), bleeding (20), hypotension (7), ischaemia (1) and others (4). Of the 55 patients, 20 died on the operating table. Of the remaining 35, a further 12 died in hospital. Overall survival was therefore 42%. Where crash-BOB was for bleeding, 17 of 20 patients (85%) survived to leave theatre, of whom 11 patients (55%) left hospital alive. In the 35 non-bleeders, only 18 (51%) survived crash-BOB and 12 (34%) left hospital alive. Sixteen patients required a second period of aortic cross-clamping of whom 13 (81%) survived to leave theatre, and 11 (69%) left hospital alive. Conversely, of nine patients in whom no specific diagnosis was found during crash-BOB, only two (22%) survived the procedure and none survived to hospital discharge. Multiple logistic regression identified pre-operative Parsonnet score (P=0.045) and the need for aortic cross-clamping to deal with an identified surgical problem (P=0.03) as significant predictors of hospital survival. Indication for crash-BOB (bleeder/non-bleeder) failed to reach significance (P=0.08). Age, sex, intra-aortic balloon pump use at the primary procedure, and time following the primary procedure to crash-BOB were not identified as predictors of hospital survival. Of the 23 hospital survivors, three patients suffered a stroke post-operatively and made a good functional recovery prior to discharge. Two patients developed sternal wound dehiscence requiring surgical rewiring. At follow-up (mean 3 years, range 1-6 years), 19 patients were in NYHA class I and four were in class II. Crash-BOB patients required an average of 8 extra intensive care days and 2 extra ward days. The total cost of these resources was pound164900 (including theatre time, cardiopulmonary bypass and intra-aortic balloon pump use). This was equivalent to pound7170 per life saved. CONCLUSIONS: Crash-BOB occurred in 0.8% of cases and was associated with a survival to discharge of 42%, and a justifiable cost of only pound7170 per life saved. Establishing an accurate diagnosis for the cause of clinical deterioration resulting in crash-BOB intervention was important, and the need for a further period of aortic cross-clamping did not preclude a favourable outcome.

Aged↗
PubMed2003

Pressure-relieving properties of a intra-operative warming device.

OBJECTIVES: The primary objective of this study was to determine differences in interface pressure between four mattress combinations: a standard operating table mattress, a pressure-relieving gel pad and an under-patient warming device set at 38 degrees C (Pegasus Inditherm System) and at ambient temperature. The secondary objective was to determine whether the warming device remains stable in extreme surgical positions. METHOD: Interface pressures obtained with all four combinations were measured in 10 healthy volunteers using force sensing array technology. RESULTS: The warming device demonstrated better or equivalent pressure relief when compared with the standard gel pad. There was no significant difference in subject position 'shift' between the mattress, the gel pad and the warming device for either the Trendelenberg or reverse Trendelenberg positions. CONCLUSION: Both pressure-relieving mattresses and warming reduce intra-operative pressure damage. A mattress with both properties may further reduce pressure damage postoperatively. The warming device used in this study appears stable--subject 'slippage' was minimal in extreme positions. Research needs to be conducted among real anaesthetised patients to support these conclusions.

Adult↗
PubMed1964

LOCAL ANESTHESIA FOR HERNIOPLASTY. IMMEDIATE AMBULATION AND RETURN TO WORK: A PRELIMINARY REPORT.

In 50 cases in which hernioplasty was carried out with atraumatic technique under local anesthesia, the patients walked away from the operating table, then through the corridors, without assistance. They usually drove home the next day and returned to their regular occupations immediately. Few had pain necessitating more than mild analgesia. In a period of follow-up ranging from six months to three years at the time of this report, two patients had recurrence.

Aged↗