Center for Military Medicine

Helsinki, Finland

Center for Military Medicine

Helsinki, Finland
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Panula J.,City Hospital of Pori | Pihlajamaki H.,Center for Military Medicine | Mattila V.M.,University of Tampere | Jaatinen P.,Rauma Health Office | And 5 more authors.
BMC Musculoskeletal Disorders | Year: 2011

Background: The high mortality of hip fracture patients is well documented, but sex- and cause-specific mortality after hip fracture has not been extensively studied. The purpose of the present study was to evaluate mortality and cause of death in patients after hip fracture surgery and to compare their mortality and cause of death to those in the general population. Methods. Records of 428 consecutive hip fracture patients were collected on a population-basis and data on the general population comprising all Finns 65 years of age or older were collected on a cohort-basis. Cause of death was classified as follows: malignant neoplasms, dementia, circulatory disease, respiratory disease, digestive system disease, and other. Results: Mean follow-up was 3.7 years (range 0-9 years). Overall 1-year postoperative mortality was 27.3% and mortality after hip fracture at the end of the follow-up was 79.0%. During the follow-up, age-adjusted mortality after hip fracture surgery was higher in men than in women with hazard ratio (HR) 1.55 and 95% confidence interval (95% CI) 1.21-2.00. Among hip surgery patients, the most common causes of death were circulatory diseases, followed by dementia and Alzheimer's disease. After hip fracture, men were more likely than women to die from respiratory disease, malignant neoplasm, and circulatory disease. During the follow-up, all-cause age- and sex-standardized mortality after hip fracture was 3-fold higher than that of the general population and included every cause-of-death category. Conclusion: During the study period, the risk of mortality in hip fracture patients was 3-fold higher than that in the general population and included every major cause of death. © 2011 Panula et al; licensee BioMed Central Ltd.

Aho M.,Center for Military Medicine | Lyytikainen O.,Finnish National Institute for Health and Welfare | Nyholm J.E.,Center for Military Medicine | Kuitunen T.,Center for Military Medicine | And 4 more authors.
Eurosurveillance | Year: 2010

In September 2009, an outbreak of 2009 pandemic influenza A(H1N1) took place in a Finnish garrison. In November 2009, we performed a serological survey among 984 recruits undergoing their military service at the garrison and related the results to self-reported upper respiratory tract infection (URTI) with or without fever. Of 346 volunteers who donated a blood sample, 169 (49%) had pandemic influenza A(H1N1) virus-specific antibodies. Of those, 84 (50%) reported no recent history of URTI, suggesting that a major part of those infected with pandemic influenza A(H1N1) virus may be asymptomatic.

Visuri T.,Center for Military Medicine | Pulkkinen P.,University of Helsinki | Paavolainen P.,University of Tampere | Pukkala E.,University of Tampere
Acta Orthopaedica | Year: 2010

Background and purpose Wear debris from conventional total hip arthroplasty (THA) induces chromosomal aberrations and DNA damage, which may promote cancerogenesis. A long latent period is required for solid tumors. We therefore re-analyzed a large THA cohort for cancer. Patients and methods We updated a cohort of 24,636 patients with primary osteoarthritis and metal-on-polyethylene THA who had been entered in the Finnish Arthroplasty Register between 1980 and 1995, and linked it to the Finnish Cancer Registry for cancer risk assessment up to 2005. The mean follow-up time was 13 years. The numbers of cancer cases observed were compared with expected rates based on incidence in the general population. Results The standardized incidence ratio (SIR) for the whole follow-up period was 0.95 (95% confidence interval (CI): 0.920.97). After 10 years of follow-up, the SIR was equal to that in the normal population (SIR 0.98, 95% CI: 0.941.03). Incidence of lung cancer was low throughout the follow-up time and that of prostate cancer was slightly elevated. The incidence rates for all other forms of cancer did not deviate significantly from those in the normal population. Interpretation We found no increased cancer risk in patients with conventional THA after an average of 13 years and up to 25 years of follow-up.

Pihlajamaki H.K.,Center for Military Medicine | Pihlajamaki H.K.,Central Military Hospital | Salminen S.T.,University of Helsinki | Tynninen O.,University of Helsinki | And 2 more authors.
Calcified Tissue International | Year: 2010

We performed qualitative and histoquantitative investigations of tissue restoration after implanting polyglycolide (PGA), polydioxanone (PDS), polylevolactide (PLLA), and stainless steel pins in the intramedullary canal of rabbit femurs. The effect of bioabsorbable devices on healing of a cortical bone defect was also assessed. The cortical bone defect was created in the right femur of 80 rabbits. Bioabsorbable and metallic pins in 60 and two metallic pins alone were implanted in 20 intramedullary canals; 80 left femurs served as intact controls. Follow-up times were 3, 6, 12, 24, and 52 weeks. At all time points, collagenous connective tissue, including bone trabeculae, surrounded the implant at the tissue-implant interface, replacing hematopoiesis and fat of the intramedullary canal. The groups did not differ in the area and trabecular bone area fraction of the resulting callus. Residual fragments of PGA and PDS were observed at 24 weeks, and complete degradation occurred within 52 weeks. PGA, PDS, PLLA, and metallic implants induced a bony and fibrous walling-off response in the intramedullary cavity. No inflammation was observed. Complete tissue restoration did not occur within the follow-up, even after complete degradation of PGA and PDS, which had shorter degradation times than PLLA. The cortical bone healing effect was not different between bioabsorbable pins and metallic wires. Thus, these polymers had no specific osteostimulatory or osteoinhibitory properties compared to stainless steel. Within the follow-up period, there were no significant differences in biocompatibility between the implants and no adverse inflammatory foreign-body reactions. © 2010 The Author(s).

Laukkala T.,Field Medicine Services Unit | Ranta S.,Datawell Ltd. | Ranta S.,University of Helsinki | Wennervirta J.,University of Helsinki | And 3 more authors.
Anesthesia and Analgesia | Year: 2014

BACKGROUND: Posttraumatic stress disorder, a common psychiatric disorder in the general population, may follow a traumatic experience of awareness with recall during general anesthesia. METHODS: We conducted a matched cohort design with 9 subjects after intraoperative awareness with recall during general anesthesia. A psychiatric diagnostic interview and questionnaire were performed on 9 matched controls and 9 subjects, a median of 17.2 years from their documented awareness episode. The subjects and the matched controls completed a battery of questionnaires related to psychosocial well-being, after which they participated in a diagnostic Structured Clinical Interview for Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition Axis I Disorders. RESULTS: Patients with awareness did not seem to differ from their matched controls in subsequent psychosocial outcome, psychiatric morbidity, or quality of life. CONCLUSIONS: We found no indication that intraoperative awareness with recall had any deleterious long-term effects on patients' psychosocial outcome. Copyright © 2014 International Anesthesia Research Society.

Pihlajamaki H.,Center for Military Medicine | Hietaniemi K.,University of Helsinki | Paavola M.,University of Helsinki | Visuri T.,Center for Military Medicine | Mattila V.M.,University of Tampere
Journal of Bone and Joint Surgery - Series A | Year: 2010

Background: Some have recommended surgical treatment of Grade-III lateral ligament injuries in very active individuals with high functional demands on the ankle. The purpose of this study was to establish whether surgery provides better long-term results than functional treatment for acute ruptures of the lateral ligaments of the ankle. Methods: Physically active Finnish men (mean age, 20.4 years) with an acute Grade-III lateral ligament rupture of the ankle were randomly allocated to surgical (n = 25) or functional (n = 26) treatment. Ligament injury was confirmed with stress radiographs. Surgical treatment comprised suture repair of the injured ligament(s) within the first week after injury. A below-the-knee plaster cast was worn for six weeks with full weight-bearing. Functional treatment consisted of the use of an Aircast ankle brace for three weeks. The main outcome measures included final follow-up examinations, calculation of an ankle score, stress radiographs, and magnetic resonance imaging scans. Results: Fifteen (60%) of twenty-five surgically treated patients and eighteen (69%) of twenty-six functionally treated patients returned for long-term follow-up (mean duration, fourteen years). All patients in both groups had recovered their preinjury activity level and reported that they could walk and run normally. The prevalence of reinjury was one of fifteen in the surgical group and seven of eighteen in the functional treatment group (risk difference: 32%; 95% confidence interval: 6% to 58%). The mean ankle score did not differ significantly between the groups (mean difference: 8.3 points; 95% confidence interval: -0.03 to 16.6 points). Stress radiographs revealed no difference between groups with regard to the mean anterior drawer (-1 mmin the surgical group and 0 mmin the functional treatment group; mean difference: 0.7 mm; 95% confidence interval: -1.4 to 2.7 mm) or mean tilt angle (0° in both groups; mean difference: 0.1°; 95% confidence interval: -3.2° to 3.5°). Grade-II osteoarthritis was observed on magnetic resonance images of four of the fifteen surgically treated patients and in none of the eighteen functionally treated patients (risk difference: 27%; 95% confidence interval: 4% to 49%). Conclusions: These findings indicate that, in terms of recovery of the preinjury activity level, the long-term results of surgical treatment of acute lateral ligament rupture of the ankle correspond with those of functional treatment. Although surgery appeared to decrease the prevalence of reinjury of the lateral ligaments, there may be an increased risk for the subsequent development of osteoarthritis. Level of Evidence: Therapeutic Level I. See Instructions to Authors for a complete description of levels of evidence. Copyright © 2010 by The Journal of Bone and Joint Surgery, Incorporated.

Nylund T.,Center for Military Medicine | Mattila V.M.,Center for Military Medicine | Salmi T.,University of Helsinki | Pihlajamaki H.K.,Center for Military Medicine | Makela J.P.,University of Helsinki
BMC Musculoskeletal Disorders | Year: 2011

Background: Brachial plexus lesions as a consequence of carrying a heavy backpack have been reported, but the typical clinical course and long-term consequences are not clear. Here we evaluated the clinical course and pattern of recovery of backpack palsy (BPP) in a large series of patients. Methods. Thirty-eight consecutive patients with idiopathic BPP were identified from our population of 193,450 Finnish conscripts by means of computerised register. A physiotherapist provided instructions for proper hand use and rehabilitative exercises at disease onset. The patients were followed up for 2 to 8 years from the diagnosis. We also searched for genetic markers of hereditary neuropathy with pressure palsies. Mann-Whitney U-test was used to analyze continuous data. The Fischer's exact test was used to assess two-way tables. Results: Eighty percent of the patients recovered totally within 9 months after the onset of weakness. Prolonged symptoms occurred in 15% of the patients, but daily activities were not affected. The weight of the carried load at the symptom onset significantly affected the severity of the muscle strength loss in the physiotherapeutic testing at the follow-up. The initial electromyography did not predict recovery. Genetic testing did not reveal de novo hereditary neuropathy with pressure palsies. Conclusions: The prognosis of BPP is favorable in the vast majority of cases. Electromyography is useful for diagnosis. To prevent brachial plexus lesions, backpack loads greater than 40 kg should be avoided. © 2011 Nylund et al; licensee BioMed Central Ltd.

Kuikka P.-I.,Center for Military Medicine | Kuikka P.-I.,Central Military Hospital | Pihlajamaki H.K.,Center for Military Medicine | Pihlajamaki H.K.,Central Military Hospital | And 3 more authors.
Scandinavian Journal of Medicine and Science in Sports | Year: 2013

The population-based incidence and risk factors for knee injuries in young adults were assessed in Finnish male conscripts performing their compulsory military service (n=128584). The main outcome variables were (1) hospitalization due to knee injuries overall and (2) hospitalization due to knee disorders as categorized into specific International Classification of Diseases, tenth revision diagnoses (cruciate and collateral ligament tears, meniscal tears, traumatic chondral lesions, and patellar dislocations). Person-time injury-incidence rates were calculated by dividing the number of persons with a diagnosed knee injury by the total exposure time of 97503 person-years. The number of subjects with surgical operations and military service class changes indicative of longer term notable disability are also reported. Risk factor analyses were performed by logistic regression. The person-based incidence of hospitalizations for knee injury was 11 cases per 1000 person-years [95% confidence interval (CI): 10.4-11.7]. The most important risk factors were higher age (odds ratio 1.7; 95% CI: 1.3-2.2) and obesity (odds ratio 1.6; 95% CI: 1.03-2.5). Two thirds of all subjects hospitalized for knee injuries had surgery, and one third had longer term notable disability. These findings indicate that knee injuries cause a significant burden of hospitalizations, often leading to surgery and longer term disability. © 2011 John Wiley & Sons A/S.

Sillanpaa P.J.,University of Tampere | Sillanpaa P.J.,Center for Military Medicine | Mattila V.M.,Center for Military Medicine | Visuri T.,Center for Military Medicine | And 4 more authors.
Knee Surgery, Sports Traumatology, Arthroscopy | Year: 2011

Purpose: The clinical role of patellofemoral (PF) osteoarthrosis (OA) in the outcome after PF stabilizing surgery is poorly understood. The study hypothesis was that PF cartilage lesions and OA are associated with a poor long-term outcome after PF stabilizing surgery. Methods: The study cohort included thirty-seven patients who underwent PF stabilizing surgery by traditional nonanatomic procedures and were evaluated a minimum of 10 years (range 10-21) after surgery. PF OA was assessed by magnetic resonance (MR) images and plain radiographs obtained at follow-up. Median patient age at follow-up was 33 years (29-43). Results: At the final follow-up, PF full-thickness cartilage lesions were observed on MR images in 29 (78%) patients. Only 46% of the patients reported satisfaction at follow-up, and dissatisfaction was associated with PF OA (full-thickness articular cartilage loss on MR images; P = 0. 022). Especially high incidence, 89%, of medial patellar facet cartilage lesions were found among the patients dissatisfied with the result (16/18 patients) (n. s.). Eight (22%) of the 37 patients reported recurrent patellar instability episodes at follow-up. Median Kujala score was 83 points (range 55-98). Conclusion: Patellofemoral OA is a significant long-term risk of nonanatomic surgery for patellar instability and has a greater impact on subjective outcome than residual instability more than 10 years after surgery. © 2010 Springer-Verlag.

Pihlajamaki H.K.,Center for Military Medicine | Visuri T.I.,Center for Military Medicine
Journal of Bone and Joint Surgery - Series A | Year: 2010

BACKGROUND: Surgical treatment of Osgood-Schlatter disease is occasionally warranted, but its long-term prognosis remains poorly investigated. We studied the rate of occurrence of surgical treatment of unresolved Osgood-Schlatter disease as well as the clinical course, radiographic characteristics, and long-term outcomes after that treatment in a large population of military recruits. METHODS: During a thirteen-year period, 178 consecutive recruits underwent surgery for unresolved Osgood-Schlatter disease, and 107 of them (117 knees) who met the inclusion criteria participated in a follow-up examination. We obtained data from the original medical records and radiographs as well as follow-up information from physical and radiographic examinations, interviews, and questionnaires to determine functional outcomes. RESULTS: The rate of occurrence of surgically treated unresolved Osgood-Schlatter disease was forty-two per 100,000 military recruits. The median age at the onset of symptoms was fifteen years. After a median duration of follow-up of ten years after the surgery, ninety-three patients (87%) reported no restrictions in everyday activities or at work and eighty (75%) had returned to their preoperative level of sports activity. The median modified Kujala score was 95 points, and the median visual analog score for pain was 7 mm. Forty-one patients (38%) reported a complete absence of pain when kneeling. Six patients had experienced minor postoperative complications, and two had undergone a reoperation for the treatment of the Osgood-Schlatter disease. After resection, the mean tibial tuberosity thickness decreased by 47%. The mean Insall-Salvati index was 1.0 preoperatively and 1.09 postoperatively (p = 0.003), and the corresponding mean Blackburne-Peel indexes were 0.85 and 0.95 (p = 0.003). With the numbers studied, the symptom duration, surgical methods, and radiographic indexes were not found to have an effect on the outcome of surgery. CONCLUSIONS: In the great majority of young adults, the functional outcome of surgical treatment of unresolved Osgood-Schlatter disease is excellent or good, the residual pain intensity is low, and postoperative complications or subsequent reoperations are rare. LEVEL OF EVIDENCE: Therapeutic Level IV. See Instructions to Authors for a complete description of levels of evidence. Copyright © 2010 by The Journal of Bone and Joint Surgery, Incorporated.

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