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Kraus R, Strohm P, Gaidzik PW, Dresing K. [Investigation of the reduction in the disability after fractures in children and adolescents]. Unfallchirurg 2021; 124:885-890. [PMID: 34609543 DOI: 10.1007/s00113-021-01085-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/06/2021] [Indexed: 11/29/2022]
Abstract
The student accident insurance has been part of the German Statutory Accident Insurance (Deutsche Gesetzliche Unfallversicherung, DGUV) for 50 years. In order to assess the reduction in working capacity (Minderung der Erwerbsfähigkeit, MdE) in the event of permanent consequences of accidents and injuries, the recommendation to treat the affected child or adolescent "as an average adult" is currently still valid. The present work deals with the everyday practice of the MdE assessment in children and adolescents and their weaknesses through the transfer of the principles from adulthood. In addition, proposals for the adaptation of the assessment principles for the growth age are drawn up.
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Ris F, Liot E, Buchs NC, Kraus R, Ismael G, Belfontali V, Douissard J, Cunningham C, Lindsey I, Guy R, Jones O, George B, Morel P, Mortensen NJ, Hompes R, Cahill RA. Multicentre phase II trial of near-infrared imaging in elective colorectal surgery. Br J Surg 2018; 105:1359-1367. [PMID: 29663330 PMCID: PMC6099466 DOI: 10.1002/bjs.10844] [Citation(s) in RCA: 127] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Revised: 12/28/2017] [Accepted: 01/28/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND Decreasing anastomotic leak rates remain a major goal in colorectal surgery. Assessing intraoperative perfusion by indocyanine green (ICG) with near-infrared (NIR) visualization may assist in selection of intestinal transection level and subsequent anastomotic vascular sufficiency. This study examined the use of NIR-ICG imaging in colorectal surgery. METHODS This was a prospective phase II study (NCT02459405) of non-selected patients undergoing any elective colorectal operation with anastomosis over a 3-year interval in three tertiary hospitals. A standard protocol was followed to assess NIR-ICG perfusion before and after anastomosis construction in comparison with standard operator visual assessment alone. RESULTS Five hundred and four patients (median age 64 years, 279 men) having surgery for neoplastic (330) and benign (174) pathology were studied. Some 425 operations (85·3 per cent) were started laparoscopically, with a conversion rate of 5·9 per cent. In all, 220 patients (43·7 per cent) underwent high anterior resection or reversal of Hartmann's operation, and 90 (17·9 per cent) low anterior resection. ICG angiography was achieved in every patient, with a median interval of 29 s to visualization of the signal after injection. NIR-ICG assessment resulted in a change in the site of bowel division in 29 patients (5·8 per cent) with no subsequent leaks in these patients. Leak rates were 2·4 per cent overall (12 of 504), 2·6 per cent for colorectal anastomoses and 3 per cent for low anterior resection. When NIR-ICG imaging was used, the anastomotic leak rates were lower than those in the participating centres from over 1000 similar operations performed with identical technique but without NIR-ICG technology. CONCLUSION Routine NIR-ICG assessment in patients undergoing elective colorectal surgery is feasible. NIR-ICG use may change intraoperative decisions, which may lead to a reduction in anastomotic leak rates.
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Rapp M, Kraus R, Illing P, Sommerfeldt DW, Kaiser MM. Behandlung der Femurschaftfraktur bei Kindern und Jugendlichen mit einem Körpergewicht ≥50 kg. Unfallchirurg 2017; 121:47-57. [DOI: 10.1007/s00113-017-0313-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Bloemendaal ALA, Kraus R, Buchs NC, Hamdy FC, Hompes R, Cogswell L, Guy RJ. Double-barrelled wet colostomy formation after pelvic exenteration for locally advanced or recurrent rectal cancer. Colorectal Dis 2016; 18:O427-O431. [PMID: 27620339 DOI: 10.1111/codi.13512] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 07/11/2016] [Indexed: 12/11/2022]
Abstract
AIM In advanced pelvic cancer it may be necessary to perform a total pelvic exenteration. In such cases urinary tract reconstruction is usually achieved with the creation of an ileal conduit with a urinary stoma on the right side of the patient's abdomen and an end colostomy separately on the left. The potential morbidity from a second stoma may be avoided by the use of a double-barrelled wet colostomy (DBWC), as a single stoma. Another advantage is the possibility of using a vertical rectus abdominis muscle flap for perineal reconstruction. METHOD All patients undergoing formation of a DBWC were included. RESULT A DBWC was formed in 10 patients. One patient underwent formation of a double-barrelled wet ileostomy. CONCLUSIONS In this technical note we present our early experience in 11 cases and a video of DBWC formation in a male patient.
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Abstract
The results of a year's group discussion between 12 aides and 3 professional persons suggest the value of group techniques for increasing understanding between nursing aides and other persons and the effectiveness of Employee Supervisor Statement Study and the Patient Attitude Scale as pre-employment selective measures and for reflecting attitude changes following group educational experience.
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El Kafsi J, Kraus R, Guy R. A report of three cases and review of the literature on rectal disruption following abdominal seatbelt trauma. Ann R Coll Surg Engl 2016; 98:86-90. [PMID: 26741660 DOI: 10.1308/rcsann.2016.0050] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Seatbelt associated blunt trauma to the rectum is a rare but well recognised injury. The exact mechanism of hollow visceral injury in blunt trauma is unclear. Stress and shear waves generated by abdominal compression may in part account for injury to gas containing structures. A 'seatbelt sign' (linear ecchymosis across the abdomen in the distribution of the lap belt) should raise the suspicion of hollow visceral injuries and can be more severe with disruption of the abdominal wall musculature. Three consecutive cases of rectal injury following blunt abdominal trauma, requiring emergency laparotomy and resection, are described. Lumbar spine injury occurred in one case and in the other two cases, there was injury to the iliac wing of the pelvis; all three cases sustained significant abdominal wall contusion or muscle disruption. Abdominal wall reconstruction and closure posed a particular challenge, requiring a multidisciplinary approach. The literature on this topic is reviewed and potential mechanisms of injury are discussed.
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Buchs NC, Kraus R, Mortensen NJ, Cunningham C, George B, Jones O, Guy R, Ashraf S, Lindsey I, Hompes R. Endoscopically assisted extralevator abdominoperineal excision. Colorectal Dis 2015; 17:O277-80. [PMID: 26454256 DOI: 10.1111/codi.13144] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Accepted: 08/04/2015] [Indexed: 02/08/2023]
Abstract
AIM Extralevator abdominoperineal excision (ELAPE) has been advocated to optimize clearance of lower third rectal cancers with an involved or threatened circumferential resection margin. ELAPE could reduce positive margins and specimen perforation compared with standard abdominoperineal excision. However, there can be difficulties with ELAPE, particularly in identifying the anterior plane in male patients. Usually, the dissection is performed in the prone position, which can be hazardous, particularly in obese patients in whom wound problems are commonly encountered. We describe an endoscopically assisted approach for ELAPE in the lithotomy position. METHOD Three male patients with a rectal tumour located at the anorectal junction underwent an endoscopically assisted ELAPE in the lithotomy position after preoperative radiotherapy. RESULTS All the procedures were performed successfully with operation times of 180, 390 and 420 mins. There were no instances of intra-operative perforation or other complications. One patient developed postoperative intestinal obstruction which resolved on conservative management. There were no wound complications. Histopathological examination demonstrated clear margins and intact mesorectal planes in each patient. CONCLUSION We report a good outcome in three patients after endoscopically assisted ELAPE. This approach allows the patient to be operated on in the lithotomy position giving excellent views of the anterior dissection.
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James DRC, Ris F, Yeung TM, Kraus R, Buchs NC, Mortensen NJ, Hompes RJ. Fluorescence angiography in laparoscopic low rectal and anorectal anastomoses with pinpoint perfusion imaging--a critical appraisal with specific focus on leak risk reduction. Colorectal Dis 2015; 17 Suppl 3:16-21. [PMID: 26394738 DOI: 10.1111/codi.13033] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Accepted: 05/29/2015] [Indexed: 12/31/2022]
Abstract
BACKGROUND AND AIMS Anastomotic dehiscence is one of the most feared complications in colorectal surgery leading to significant morbidity and mortality. Progressively lower anastomoses are associated with a greater leak rate. One of the key factors is the perfusion of the bowel to be joined. Presently, surgeons rely on a variety subjective measures to determine anastomotic perfusion and mechanical integrity however these have shortcomings. The aim of this paper is to appraise the literature on the use of fluorescence angiography (FA) in laparoscopic rectal surgery. MATERIALS AND METHODS A Pubmed search was undertaken using terms 'fluorescence angiography' and 'rectal surgery'. The search was expanded using the related articles function. Studies were included if they used FA specifically for rectal surgery. Outcomes of interest including anastomotic leak rate, change of operative strategy and time taken for FA were recorded. RESULTS Eleven papers detailing the use of FA in rectal surgery are outlined demonstrating that this technique may change operative strategy and lead to a reduction in anastomotic leak rate. CONCLUSION In this paper, we discuss assessment of colorectal blood supply using FA and how this technique holds great potential to detect insufficiently perfused bowel. In so doing, the operator can adjust their operative strategy to mitigate these affects with the aim of reducing the complications of anastomotic leak and stenosis. However, it is highlighted that there is a clear need for randomised controlled trials in order to determine this definitively.
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Angyal A, Ilyas Z, Hadadi E, Johnston J, Ariaans M, Kraus R, Wilson H, Bauer R, Rader D, Francis S, Kiss-Toth E. Does myeloid expression of TRIB1 regulate plasma lipid levels? Atherosclerosis 2015. [DOI: 10.1016/j.atherosclerosis.2015.04.125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Svitova AL, Krupskaya Y, Samoylova N, Kraus R, Geck J, Dunsch L, Popov AA. Magnetic moments and exchange coupling in nitride clusterfullerenes Gd(x)Sc(3-x)N@C80 (x = 1-3). Dalton Trans 2015; 43:7387-90. [PMID: 24622767 DOI: 10.1039/c3dt53367k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The magnetic properties of nitride clusterfullerenes GdxSc3-xN@C80 (x = 1-3) are studied as a function of the number of Gd atoms in the cluster. The intracluster interaction of the Gd ions in Gd2ScN@C80 and Gd3N@C80 is ferromagnetic with exchange constants of -1.2 K ± 0.1 K and -0.6 K ± 0.1 K, respectively. At 2 K, the magnetization curves exhibit noticeable deviations from the Heisenberg model pointing to a non-negligible anisotropy.
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Kraus R, Stahl JP, Heiss C, Horas U, Dongowski N, Schnettler R. [Fractures of the thoracic and lumbar spine in children and adolescents]. Unfallchirurg 2013; 116:435-41. [PMID: 22101777 DOI: 10.1007/s00113-011-2113-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND Only 1.5-2% of all fractures in children and adolescents are fractures of the thoracic and lumbar spine. Treatment is most often conservative. This study compares the own experience with the recent literature. MATERIAL AND METHODS Over a 48 month period all patients with fractures of the thoracic and lumbar spine, younger than 16 years were included prospectively. Of the patients 67 underwent follow-up investigations after 3-36 months. RESULTS The average age of the patients was 11.9 years. Sports (53%) and traffic (28%) accidents were most frequent. Fractures most often appeared in the mid-thoracic (47%) and thoracolumbar spine (41%). Operative treatment was performed in 9 cases (10.4%). Secondary loss of alignment was not observed neither after conservative nor operative treatment. Neurological deficits (n=2) did not completely improve. CONCLUSIONS Most fractures of the thoracic and lumbar spine heal fast and without any sequelae. Unstable fractures of type B and C (exclusively occurring as a result of traffic accidents) need operative stabilization as in adults.
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Schneidmueller D, Sander AL, Wertenbroek M, Wutzler S, Kraus R, Marzi I, Laurer H. Triplane fractures: do we need cross-sectional imaging? Eur J Trauma Emerg Surg 2013; 40:37-43. [PMID: 26815775 DOI: 10.1007/s00068-013-0338-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Accepted: 09/30/2013] [Indexed: 11/29/2022]
Abstract
INTRODUCTION Diagnosis of Triplane fractures remains difficult in common practice. Aim of the study was the evaluation of the fracture pattern and the benefit of cross-sectional imaging in classification of Triplane-fractures. MATERIAL AND METHODS A total of 27 pediatric patients treated for ankle fractures were identified from patient charts. Radiographic images of epiphyseal fractures (X-rays and additional cross-sectional imaging) were blinded evaluated by 13 observers to answer a specific questionnaire regarding type or fracture and treatment suggestion. RESULTS There were seven Triplane-I and eight Triplane-II fractures. The other physeal ankle fracture group consisted of four patients with a Twoplane-fracture, five Salter-and-Harris (SH) II, one SH-III, and two SH-IV fracture. Accuracy of classification improved considerably depending on the experience of the observer in pediatric trauma care. Surgeons specialized in pediatric trauma care classified correctly with conventional X-rays in 48.1 % of all cases presented versus 31.5 % appropriate diagnosis by younger fellows. Accuracy in exact specification of Triplane-fractures was comparable lesser in younger fellows (31.1 vs. 22 %). Cross-sectional imaging improved classification of all fractures in both groups (75.6 % specialized vs. 47.3 % non specialized). Whereas availability of cross-sectional imaging improved treatment recommendation in specialized surgeons this benefit was not detectable for the doctors without specialization. Evaluation of fracture pattern showed a relatively stereotypical fracture pattern in Triplane-II fractures, whereas Triplane-I fractures were more variable. CONCLUSION The additional information of cross-sectional imaging seems helpful for any physician in finding the right classification of a pediatric ankle fracture. However, the additive information appears especially viable for experienced surgeons to suggest the appropriate treatment.
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Kraus R. The pediatric vs. the adolescent elbow. Some insight into age-specific treatment. Eur J Trauma Emerg Surg 2013; 40:15-22. [PMID: 26815773 DOI: 10.1007/s00068-013-0342-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Accepted: 09/30/2013] [Indexed: 11/30/2022]
Abstract
Almost 20 % of all long bone fractures in childhood and adolescents involve the elbow region. Physicians dealing with pediatric trauma cases on a regular basis must be familiar with the specific radiologic features of the elbow at every developmental stage. This includes the shape and the appearance of elbow ossification centers, and knowledge of age-specific injury patterns. In young children, lateral condyle and supracondylar fractures of the distal humerus are most common. Radial neck fractures, Monteggia's lesion and olecranon fractures appear in every age during growth. Bicondylar fractures of the distal humerus, capitellar fractures and radial head fractures almost solely occur after the tenth year. Treatment options depend on fracture type, age and demands and vary from immobilization to closed reduction and open reduction including internal fixation with different types of materials. Special circumstances to influence the treatment regimen in every single injury entity are discussed. Additionally, the most common malformations and nontraumatic diseases of the elbow region are mentioned.
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Kraus R, Heberer J. [Informed consent consultation as a part of patient safety in pediatric traumatology]. Unfallchirurg 2013; 116:877-83. [PMID: 24013653 DOI: 10.1007/s00113-013-2443-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In pediatric traumatology as in any other surgical specialty, every treatment measure has to be protected by an adequate clarification. A legally effective clarification has to cover various aspects, such as diagnosis, treatment, risk and safety clarification and leads to an informed consent consultation. The contents of this informed consent discussion must be documented. The nature and extent of clarification, among other things depend on the urgency of the procedure and in an emergency it can be dispensed with in pediatric traumatology. In the case of minors the conversation must be conducted basically in the presence of both parents as they alone are legally entitled to give approval. General treatment proxies are not allowed. If it is not possible to talk to both parents the physician is allowed to trust that the parent present represents the will of the absent parent. Intervention cannot be carried out against the will of adolescents capable of self-determination even with the consent of the parents. The application of these rules is illustrated by means of practical examples.
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Kraus R. [Treatment-related damage to the radial nerve in paediatric traumatology]. Zentralbl Chir 2013; 139:643-7. [PMID: 23907839 DOI: 10.1055/s-0032-1328741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
BACKGROUND Iatrogenic damage of the N. ulnaris is a known complication of treatment of supracondylar humeral fractures in children. But damage to the N. radialis can also occur in the treatment of many typical fractures of the upper extremity during growth. There are no differentiated investigations on their incidence. PATIENTS AND METHODS This paper presents a prospective case collection and describes the personal experience with the occurrence and treatment of iatrogenic damage to the radial nerve during growth. RESULTS In all 9 out of 20 cases occurred in the primary care setting, a further 9 under the metal removal and 2 on the occasion of corrective surgery. 50 % occurred after treatment of forearm shaft fractures, 39 % after distal-metaphyseal radius fractures, 11 % after radial neck fractures. In 80 % of the cases the sensory terminal branch was affected, in another 15 % the motor branch and in 5 % the main trunk of the nerve. CONCLUSIONS The treatment of iatrogenic nerve damage should be cautious and restrained, spontaneous remissions, especially of pure sensory deficits, are common.
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Kroll T, Kraus R, Schönfelder R, Aristov VY, Molodtsova OV, Hoffmann P, Knupfer M. Transition metal phthalocyanines: Insight into the electronic structure from soft x-ray spectroscopy. J Chem Phys 2012; 137:054306. [DOI: 10.1063/1.4738754] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kraus R, Alzen G, Dreyer T, Szalay G, Schnettler R. [Dupuytren's disease in children - case report and literature review]. HANDCHIR MIKROCHIR P 2012; 44:175-7. [PMID: 22833071 DOI: 10.1055/s-0032-1312655] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
Abstract
Dupuytren's disease in childhood and adolescence is extremely rare. As in adults most patients are male. We report on a girl at the age of 7 years with a cord in the palm.
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Glawion S, Haverkort MW, Berner G, Hoinkis M, Gavrila G, Kraus R, Knupfer M, Sing M, Claessen R. Unoccupied electronic structure of TiOCl studied using x-ray absorption near-edge spectroscopy. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2012; 24:255602. [PMID: 22647754 DOI: 10.1088/0953-8984/24/25/255602] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We study the unoccupied electronic structure of the spin-1/2 quantum magnet TiOCl using x-ray absorption near-edge spectroscopy (XANES) at the Ti L and O K edges. We acquire data both in total electron and fluorescence yield modes (TEY and FY, respectively). While only the latter allows us to access the unconventional low-temperature spin-Peierls (SP) phase of TiOCl, the signal is found to suffer from significant self-absorption in this case. Nevertheless, we conclude from FY data that effects of the SP distortion on the electronic structure are absent in the incommensurate intermediate phase within experimental accuracy. The similarity of room-temperature FY and TEY data, the latter not being obscured by self-absorption, allows us to use TEY spectra for comparison with simulations. These are performed by means of cluster calculations in D(4h) and D(2h) symmetries using two different codes. We extract values of the crystal-field splitting and parameterize our results using the commonly seen notation of Slater, Racah and Butler. In all cases, good agreement with published values from other studies is found.
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Kraus R, Albrecht J, Schnettler R, von Pichler M. [Reconstruction of the heel in a two-year-old boy after lawn mower injury]. ZEITSCHRIFT FUR ORTHOPADIE UND UNFALLCHIRURGIE 2012; 150:177-80. [PMID: 22328200 DOI: 10.1055/s-0031-1298260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
INTRODUCTION Lawn mower injuries in children usually involve the lower extremities and can lead to serious amputation injuries. Treatment should look not only at the acute reconstruction, but also on maintaining the ability to grow. We report the case of a two-year-old boy with amputation of the heel. CASE REPORT The boy was run over by a lawn mower. He suffered a complete loss of heel soft tissue, 30 % of the os calcis and the Achilles tendon. The one-stage reconstruction was performed by transplantation of an iliac crest graft, fascia lata to reconstruct the Achilles tendon and a microvascular latissimus dorsi flap. After one year, the functional and cosmetic result is excellent, the bone graft is healed completely and shows growth trends. DISCUSSION The successful treatment of such a severe amputation injury requires the interdisciplinary cooperation between paediatric traumatologists, plastic surgeons, physical therapists and orthopaedic shoemaker. The result justifies the great effort.
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Kraus R, Peters F, Geck A, Lips KS, Obert M, Röder C, Schnabelrauch M, Schnettler R, Heiss C. [Adhesive strength of a β-tricalcium phosphate-enriched bone adhesive]. ZEITSCHRIFT FUR ORTHOPADIE UND UNFALLCHIRURGIE 2011; 149:271-8. [PMID: 21567362 DOI: 10.1055/s-0030-1270709] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
BACKGROUND This investigation describes experimental tests of the biomechanical features of a new resorbable bone adhesive based on methacrylate-terminated oligolactides enhanced with osteoconductive β-tricalcium phosphate. MATERIAL AND METHODS 51 New Zealand white rabbits were randomised to an adhesive group (n = 29) and a control group (n = 22). An extra-articular bone cylinder was taken from the proximal tibia, two stripes of adhesive were applied and the cylinders were replanted. After 10 and 21 days, 3 and 12 months tibial specimens were harvested and the cylinder pull-out test was performed with a servo-hydraulic machine. Additionally the pull-out force was evaluated with the bone-equivalent Ebazell® after 5, 10 and 360 minutes in 14 specimens each. RESULTS Average pull-out forces in the adhesive group were 28 N after 10 days (control: 57 N), 155 N after 21 days (216 N), 184 N after 3 months (197 N) and 205 N after 12 months (185 N). Investigations with Ebazell® showed almost identical pull-out forces after 5 min, 15 min and 360 min. Adhesive forces were as high as 125 N/cm (2) of adhesive surface and more than 1200 N/g of adhesive mass. CONCLUSIONS The adhesive investigated here has a very good primary adhesive power, compared to the literature data, achieved after only 5 minutes. Even in moist surroundings the adhesive capacity remains sufficient. The adhesive has to prove its resorptive properties in further investigations and in first line its medium-term and long-lasting biocompatibility. Furthermore, biomechanical features will have to be compared to those of conventional fixation techniques.
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Szalay G, Schleicher I, Kraus R, Pavlidis T, Schnettler R. Die Versorgung der Fraktur der dorsalen Endphalanxbasis mit der Hakenplatte. HANDCHIR MIKROCHIR P 2010; 43:46-53. [DOI: 10.1055/s-0030-1267992] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Szalay G, Schleicher I, Kraus R, Stigler B, Schnettler R. [The operative treatment of the dorsal distal phalanx near to the base (osseous pull out of the extensor tendon) with extreme exposure of the hand by athletic activities - is the hook plate a option for treatment?]. SPORTVERLETZUNG-SPORTSCHADEN 2010; 24:159-65. [PMID: 20845245 DOI: 10.1055/s-0029-1245364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AIM Aim of the presented investigation was to work out the short- and mid-term outcomes after operative treatment of distal phalanx fractures near to the base of type Doyle IVb and IVc (osseous pull out of the extensor tendon) by means of a hook plate in patients with extreme exposure of the hand by athletic activities. PATIENTS AND METHODS Between February 2002 and September 2009 77 patients were treated by operation in our hospital by means of a hook plate due to a traumatic fracture of the dorsal distal phalanx near to the base of type Doyle IVb and IVc (osseous pull out of the extensor tendon) by means of a hook plate (Aerni plate/S2-Prong-Plate) of Stryker Leibinger. 64 of these 77 patients incur the fracture while exercising sport. 46 of these 64 patients were clinically and radiologically followed up within a retrospective study. To assess the therapy's outcome a specific scoring scheme containing subjective and objective parameters was elaborated in order to gain a transparent result of the treatment. RESULTS According to this scoring scheme 84.79 % of the patients reached a very good or good result. Nail growth defects by an intraoperative injury of nail matrix represents an essential complication of the presented surgical method. CONCLUSION By means of the presented method in the majority of the cases good or very good results could be achieved. That method represents a simple, safe and less complicate possibility to treat the distal phalanx fractures near to the base type IVb and IVc according to Doyle and it is considered as a useful alternative to other procedures.
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Arellano-Garcia H, Kraus R, Wozny G. Neues Prozesskonzept zur Produktion von Milchsäureethylester. CHEM-ING-TECH 2010. [DOI: 10.1002/cite.201050547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Kraus R, Röder C, Perler G, Schneidmüller D, Sommerfeldt D, Wessel L, Schnettler R, Linhart W. [Do paediatric and adult surgeons follow different approaches to physeal fractures?]. Zentralbl Chir 2010; 136:164-7. [PMID: 20669098 DOI: 10.1055/s-0030-1247359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
INTRODUCTION The treatment of paediatric fractures is the concern of several different surgical specialties. There has been no scientific investigation on the different concepts of paediatric (PS) and adult surgeons (AS). METHODS 62 paediatric traumatologists were asked concerning their experience with physeal fractures of the leg, including ten cases. RESULTS Growth disturbances was estimated to be more rare by PS. On evaluation of the examples there were no significant differences in the judgement of degree and direction of the displacement. For displaced fractures, PS rather preferred closed reduction and immobilisation, whereas AS favoured osteosynthesis. DISCUSSION There were no basic differences between PS and AS in the treatment of lower limb fractures. AS tend to act more invasively. At the same time they are more concerned about growth disturbances.
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Kraus R, Pavlidis T, Dongowski N, Szalay G, Schnettler R. Children and adolescents with posttraumatic shoulder instability benefit from arthroscopic stabilization. Eur J Pediatr Surg 2010; 20:253-6. [PMID: 20383821 DOI: 10.1055/s-0030-1252004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Traumatic dislocation of the shoulder in childhood is rare, accounting for only 0.01% of all injuries in this age class. However, literature does contain indications that post-traumatic instabilities and re-dislocations occur with more than average frequency in children and adolescents. MATERIAL AND METHODS This study describes the technique and results of arthroscopic stabilization of the shoulder joint before the completion of growth. Over a period of four years, seven patients were treated prior to reaching skeletal maturity. Five patients were treated by means of arthroscopically assisted labral refixation using suture anchor systems. RESULTS Arthroscopic labral refixation for post-traumatic shoulder instability could be carried out using the same surgical procedure as in adults. Clinical follow-up was undertaken after 12 to 48 (average 26) months using modified Constant-Murley and Rowe scores. Instability, re-dislocations and postoperative impairment of mobility did not occur after arthroscopic treatment, with an average Constant score of 92 points (Rowe score >95 points). CONCLUSION This study demonstrated that this technique can be used successfully in children and young people prior to skeletal maturity. Considerable experience in adult shoulder reconstruction promises excellent results in children and adolescents, too. There was no evidence of growth disturbance or biodegradation-associated problems in this group of children and adolescents. Delay of labral refixation until adulthood is therefore not indicated.
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