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Biomedical subjects

G Muhr

Publications and source records attributed to G Muhr.

At least 55 records · Page 3Linked to original sources

Detection of high-energy phosphates in cortical bone as an indicator of bone healing and remodelling: use of a rabbit model.

UNLABELLED: PURPOSE; To study high-energy phosphates in cortical bone through experiments on inbred white New Zealand rabbits. METHODS: Tibial fractures were induced in 80 rabbits and then stabilised by screw osteosynthesis. After 3 (group A; n=40) or 7 days (groups B; n=40), the defective tissue was covered by local muscle flaps. At increasing intervals (from 1 to 16 weeks), the screws were removed and the animals were euthanised (n=8 per group). The bone was removed and analysed histomorphologically; adenosine triphosphate (ATP) levels were determined by high-performance liquid chromatography. RESULTS: The mean ATP concentration in healthy cortical bone at 16 weeks was 0.092 (standard error, 0.009) nmol/mg dry mass, which was significantly higher than that in the group with delayed healing: 0.081 (0.011) nmol/mg in group A and 0.005 (0.001) nmol/mg in group B (paired t test, p<0.05). Earlier healing led to lower rates of necrosis (0 vs 38; groups A vs B) and osteomyelitis. CONCLUSION: Early muscle-flap coverage can revascularise the cortical bone, which is reflected in the higher ATP content in the cortical bone measured by high-performance liquid chromatography. Measuring changes of ATP levels can help investigate the metabolism of the pathological bone.

Adenosine Triphosphate↗

[Serious complication after subcutaneous injection of heparin for prophylaxis of thromboembolism. Case report].

Subcutaneous application of low-dose heparin before and after surgery is a routine procedure to avoid thromboembolic complications. Advances in development of anticoagulants, reduction of intervals between applications, modern injection tools,and training of the personnel have already reduced the incidence of severe complications. However, the case presented shows impressively that a life-threatening complication is still possible and has to be kept in mind in perioperative thrombosis prophylaxis. After postoperative subcutaneous injection of low-dose-heparin in the right lower abdominal wall, a 76-year-old female patient suffered from an extensive,hemodynamically active hematoma located in the M.rectus abdominis as a sequela of perforating the A. epigastrica superficialis. Consequently hypovolemic shock led to cardiopulmonary circulatory arrest. After immediate resuscitation, surgical hemostasis was performed and the hematoma was removed. Post-interventional stabilization of circulation and wound healing were trouble free.

Aged↗

[Fracture dislocation of the elbow involving the coronoid process].

INTRODUCTION: Elbow dislocations are associated with osseus lesions in 30-50%. Integrity of the coronoid process is essential for stability of the elbow joint. METHODS: A retrospective study of 39 patients out of 51 was conducted to evaluate a result of surgical treatment in fracture dislocation of the elbow involving the coronoid process. The patients were followed for an average of 45 months. RESULTS: Operative results were assessed using the Morrey-Score. 3 patients presented an excellent, 19 a good, 14 a moderate and 3 a non satisfactory result. CONCLUSION: Results of operative treatment of fracture dislocation of the elbow are essentially determined by the extent of associated osseus lesions of the radial head and the olecranon. To achieve acceptable functional results early reconstruction and fixation of the coronoid process as well as early mobilisation of the joint is necessary.

Adult↗

[The role of the tibiofibular syndesmotic and the deltoid ligaments in stabilizing Weber B type ankle joint fractures--an experimental investigation].

The purpose of the present biomechanical investigation was to check the functional importance of the syndesmosis ligaments and of the deltoid ligament for ankle fracture type B according to the AO-Weber classification. We constructed a special fixation clamp, with 12 fresh and unembalmed lower legs being tested for lateral shift (mm) and ten for tibiotalar rotation. All specimens were exposed in the same neutral position. Transverse loads (F(y)) varied between 0 and 150 N, axial loads (F(z)) between 0, 300, 600 and 1,000 N and rotational loads (F(r)) between 2.4 and 4.9 Nm. All series were repeated according to supination-eversion (SE) injury patterns of the Lauge-Hansen classification. Syndesmotic ligaments and the fibula were incrementally sectioned from anterior to posterior. Type SE I consisted of an isolated incision of the anterior syndesmosis ligament. Type SE II had an additional oblique fracture of the fibula at the height of the tibiofibular syndesmosis. In type SE III injuries, in addition to the fibular fracture, a complete rupture of the syndesmosis ligaments was present, and for type SE IV lesions the deltoid ligaments were incised. The transverse load-displacement curve was s-shaped in all uninjured joints,with the highest gradient between 10 and 20 N with no axial compression. Without axial compression in cases of F(y)=25 N transverse loads, the mean talus translation was 0.51 mm. Following type II injuries, the average talus translation was 0.68 mm (not significant) and rose to an average of 0.95 mm ( P <0.01) in type III injuries. After additional incision of the deltoid ligaments, the ankle joint subluxed permanently when more than 5-10 N transverse loads were applied. Axial loads of 300 N or more resulted in a considerable reduction in talus translations, indicating increased stability and congruency within the joint complex. In this way, the vertical loading of the ankle joints always contributed to joint stability. The average internal tibiotalar rotation reached with a torque of 2.4 Nm was 3.52 degrees and with 4.9 Nm 5.15 degrees when no axial compression was applied. External rotation measured -6.36 degrees and -8.62 degrees, respectively. Following the experimental protocol, significant increases were noted for external rotation at SE II degrees injuries ( P =0.003) and for internal rotation at SE III degrees ( P =0.03) injuries. Our data support the proposition that the deltoid ligaments and the posterior syndesmosis play a key role in the stability of ankle fractures for supination-eversion injuries. If these structures remain intact, conservative and early functional treatment are recommended in patients with minimal (<2 mm) or no fracture displacement. This concept is confirmed by the literature dealing with clinical mid- and long-term follow-up studies.

Ankle Injuries↗

[Sigmoid colon perforation with local peritonitis caused by indirect trauma--case report and review of the literature].

Injuries to the sigmoid occur either as acute or protracted events. In the first case, enteral contents discharge into the abdominal cavity and a generalized, fecal, life-threatening peritonitis with a bad prognosis develops. In the protracted form, the rupture is covered by peritoneum and adherent organs before perforation. The ensuing abscess formation may lead to perforation into contiguous visceral organs or the cutis. Frequently an intestinal or cutaneous fistula results. The trigger for a sigmoid perforation can be a spontaneous rupture in an already vulnerable intestine. Common precursory diseases are diverticulitis, colitis, carcinomas, and necroses. Also, elevated intestinal pressure invoked by increased bearing down or coproliths may cause disruption. Diagnostic procedures such as rectoscopy and rectal contrast instillation are frequent idiopathic causes of traumatic injuries to the sigmoid. Perforating injuries of the abdominal cavity by stabbing, gunshot, or impalement may affect the sigmoid and open its lumen. Foreign bodies often lead to traumatic injuries of the rectosigmoid junction. In contrast, indirect trauma as a cause of sigmoid perforation, which is described in the following case, is very rare. A 62-year-old woman,who had a cholecystectomy and adhesive strangulation of intestine in her history, was admitted to our clinic after falling down stairs and landing on her bottom. She suffered a sigmoid rupture and peritonitis. Laparotomy and suturing of the sigmoid defect were performed.

Accidental Falls↗

[10-year results of bone marrow stimulating therapy in the treatment of osteochondritis dissecans of the talus].

The optimal operative therapy for the treatment of osteochondritis dissecans tali is still controversial. Beside bone marrow-stimulating techniques like abrasion arthroplasty, drilling and microfracturing, new techniques like autologous osteochondral transplantation and autologous chondrocyte transplantation are increasingly used. This study reviewed the clinical, radiological and subjective long-term outcome of bone marrow-stimulating therapy for 45 ankles with an osteochondritis dissecans tali stage 3 or 4 according to the classification by Berndt and Harty. All ankles were treated by the removal of the dissecate and abrasion of the subchondral bone. In 67%, an additional antegrade drilling of the defect was performed. The average maximum size of the lesion was 1.1 cm. At follow-up examination, 10.4 years (7.1-13.5 years) postoperatively, the average AOFAS-score was 91 points (66-100 points). Using the score of Mazur, the outcome of 28 ankles (62%) was rated excellent, 12 ankles (27%) were rated good and five ankles (11%) fair or poor. Progressive osteoarthritic changes, according to the classification of van Dijk, were seen in seven ankles (16%). Reoperations were necessary in eight cases (18%). Obesity, age older than 40 years and preoperative osteoarthritic changes had a significant negative impact on the clinical outcome. Bone marrow stimulating therapy is an inexpensive, low invasive therapy and a good therapeutic option at least for small Berndt/Harty stage 3 and 4 ODT lesions. Autologous chondrocyte transplantation and osteochondral autografts yield encouraging 2- and 4-year results, but still have to prove their superiority in long-term follow-up studies.

Adolescent↗

[The postoperative control CT after a fracture of the acetabulum. A useful quality control measure or an unnecessary exposure to radiation?].

Fractures of the acetabulum are severe injuries of the hip joint. Exact preoperative management is necessary to make possible an anatomical reconstruction. Postoperative quality control is done best with computed tomography. Is the higher radiation exposure caused by this routine examination justified?During the 5 years from 1995 to 1999, a total of 154 patients with fractures of the acetabulum were examined postoperatively at our clinic using CT to control reconstruction, implant position and the remaining free fragments in the joint. Thirteen of these patients (8.4%) had to be re-operated after postoperative CT control. The causes of the re-operation were four cases of an intra-articular implant position, three of free fragments remaining in the joint, and in 6 patients showed inadequate reconstruction. The mean radiation exposure was 25 mGy per patient. The low mean age of the patients and the long lasting consequences of a probably unrecognised complication, justify routine, postoperative CT control, even though the radiation exposure is about 10 mGy higher than the conventional radiological diagnosis. The use of CT diagnosis as a routine postoperative measure is an appropriate control procedure that allows an objective assessment of the quality of the result for the patient as well as for the surgeon.

Acetabulum↗

[Traumatic atlanto-axial rotatory fixation with lateral mass fracture of the axis].

Traumatic atlanto-axial rotatory fixation (AARF) is a relatively uncommon injury, especially in association with fractures of the axis. The rotatory dislocation and fixation is normally caused by intercalated facet joints of axis and atlas. A traumatic AARF in a 21 year old female is presented with special emphasis on the diagnostic and therapeutic approaches. This high velocity injury was caused by a traffic accident. The trauma service which was initially involved made the correct diagnosis and tried to reduce the dislocation by skull traction during analgesia and sedation, but without success. For further treatment, the patient was referred to a level one trauma center. After completing the diagnostic imaging with MRI and CT for exact delineation of the fracture site and determination of ligament damage, a halo fixation for skull traction was installed. This second attempt was also unsuccessful. Only a closed reduction under general anesthesia with muscle relaxation led to a neutral alignment and congruent joint contact between C1 and C2. Due to the stable fracture site and the intact ligaments, a conservative treatment with a stable collar splint was performed.

Accidents, Traffic↗

[Patellectomy after trauma: is there a correlation between the timing and the clinical outcome].

AIM OF THE STUDY: Is there a correlation between the timing of patellectomy after trauma in crush injuries and the clinical outcome? METHODS: Retrospective analysis of 21 patients who had undergone patellectomy after trauma. RESULTS: In 12 patients (57.1%) a primary patellectomy was performed within 4 weeks after the fracture; in the remaining 9 (42.9%) patients the procedure was performed after an average of 21 months (range 2-72). Nineteen patients could be followed up after 9.3 years (range 3-18). In 10 of these, patellectomy had been performed primarily. The HSS Knee Score was 68.4 points (range 39-83) on average for all patients. For patients with a primary patellectomy the score was 71 points (range 54-83), while for patients in whom the patellectomy was performed secondarily the score was 63.8 points (range 39-77). The evaluated ROM was 113.6 degrees for all patients; in the primary group ROM was 122.5 degrees (range 65-145 degrees ), and in the secondary group it was 103 degrees (range 85-145 degrees ). The difference was not statistically significant for either parameter. CONCLUSION: Primary reconstruction of the patella is recommended in multifragmentary fractures; if the outcome is poor, however, patellectomy should be considered early.

Adolescent↗

[Importance of the cross-sectional area of the spinal canal in thoracolumbar and lumbar fractures. Is there any correlation between the degree of stenosis and neurological deficit?].

A relationship between traumatic spinal canal stenosis and the degree of neurological deficit is known for the cervical spine. However, this has not been proven for the thoracolumbar and lumbar spine. During a period of 4 years, from 1996 to 1999, 1168 patients with a spinal injury were treated at our department, 473 of these by operation. Thirty-five were examined in a separate group. They showed a single fracture of the thoracolumbar and lumbar spine with stenosis of the spinal canal. All fractures were single burst fractures after blunt trauma. All patients were conscious and fully oriented at the time of admission and a thorough neurological examination could be performed. The fractures were diagnosed by conventional X-ray in two views and computed tomography (CT). Using the transverse CT scans in horizontal view, the sagittal diameter was measured and the degree of stenosis calculated in percent at the level of the fracture and one below and above. The group included 25 male and 10 female patients, with a mean age of 38 years (range: 17-61 years). Of the 35 patients, 19 (54.3%) showed neurological deficits after spinal cord injury,and 16 (45.7%) were without any neurological complications at the time of first admission to the hospital. There was no correlation between the extent of spinal canal stenosis and the degree of the neurological deficit. One patient with stenosis of 20% suffered from neurological dysfunction, others with stenosis up to 80% were without spinal cord injury. The average stenosis of the spinal canal was 49.6% in cases with cord injury and 46.3% in patients without neurological dysfunction. No correlation and no predisposing anatomical structures could be found between stenosis and neurological deficit.

Adolescent↗

Methicillin-resistant Staphylococcus aureus whole-body decolonization among hospitalized patients with variable site colonization by using mupirocin in combination with octenidine dihydrochloride.

The object of this study was to investigate the efficacy of a methicillin-resistant Staphylococcus aureus (MRSA) multisite carriage decolonization in 32 hospitalized carriers--25 from surgical and seven from medical wards. Twenty-four of the patients had wounds (e.g. chronic ulcers, surgical sites) and 17 were spinal cord injury patients. Decolonization was performed by intranasal application of mupirocin, combined with an octenidine dihydrochloride bodywash over a period of five days. Samples from the nose, forehead, neck, axilla and groin were taken 24-48 h before beginning decolonization (sample point I, N=32) and 24-48 h afterwards (sample point II, N=32). Further samples, were taken seven to nine days after the procedure (sample point III, N=25). Contact sheep blood agar plates (24 cm2) were used to quantify MRSA colonies on forehead and neck. MRSA from other sample sites was determined semi-quantitatively. All patients were proven to be MRSA positive at one or more extranasal site(s); 18.8% did not have nasal carriage. The overall decolonization rate for all sites was 53.1% (sample point II) and 64% (sample point III), respectively. The reduction was significant for every site, showing a rate of 88.5% for nose (II, III) and of 56.3% (II) and 68% (III) for all extranasal sites together. Of 32 patients, a median of 6.5 cfu MRSA/24 cm2 was obtained for the forehead before decolonization and 0.5 cfu MRSA/24 cm2 for the neck. A significant reduction (0 cfu MRSA/24 cm2) from both sites was shown after treatment. Before decolonization procedures, median MRSA levels for the nose, groin and axilla were 55, 6 and 0 cfu/swab. After treatment, MRSA from each of these sites was significantly reduced. We conclude that nasal mupirocin combined with octenidine dihydrochloride whole-body wash is effective in eradicating MRSA from patients with variable site colonization.

Administration, Cutaneous↗

Impact of omega-3 fatty acid enriched TPN on leukotriene synthesis by leukocytes after major surgery.

Major surgery leads to post-traumatic immune dysregulation which is driven by the activation of potent proinflammatory mediators including the leukotrienes (LTs). The LTs of the four-series derive from arachidonic acid (an omega-6 fatty acid). In contrast, LTs of the five-series are metabolic products of eicosapentaenoic acid (an omega-3 fatty acid) and exert less biological activities. Therapeutical strategies to attenuate proinflammatory signals include the provision of omega-3 fatty acids. Thirty patients with major elective abdominal surgery and an indication for total parenteral nutrition (TPN) were compared in a prospective, double blind, randomized study of two parallel groups. Group 1 (n=14) received an omega-3 fatty acid enriched 20% lipid emulsion (MCT:LCT:fish oil = 5:4:1, MLF541; Lipoplus) for 5 days postoperatively. Group 2 (n=16) received a standard 20% fat emulsion (LCT; Intralipid). The LT release from whole blood leukocytes stimulated with Ca-ionophore was analyzed preoperatively and on postoperative days 1, 6 and 8 by HPLC. There was a significant increase in the generation of LTB(5) (P=0.0035) and in the ratio of LTB(5)/LTB(4) (P=0.0017) the omega-3 group, but not in the reference group after 5 days infusion of the lipid emulsions. The omega-6/omega-3 fatty acid ratio 3:1 of the newly developed MLF541 lipid emulsion is appropriate to increase the synthesis of the biologically less active leukotrienes of the five-series. Nutritive enrichment with omega-3 fatty acids in a balanced ratio with omega-6 fatty acids is an important step to avoid hyperinflammatory situations in patients after major surgery.

Abdomen↗

[Complex fractures of the humeral head: which long-term results can be expected?].

BACKGROUND: Although improved techniques of internal fixation and prosthetic replacement were introduced successfully in the field of operative fracture care, treatment of complex fractures of the proximal humerus also involving the humeral head remains to be a challenge to the trauma surgeon. We therefore investigated clinical and radiological long-term results after humeral head preserving procedures. METHODS: 41 patients with a three or four part fracture of the humeral head were evaluated on average 6.6 years (min. 4.4 y; max. 9.0 y) after the trauma. The evaluation was based on the Constant- and HSS score clinically and on the Neer score radiologically. Nine patients were treated conservatively (group A), 13 patients had primarily an operative treatment (group B) and another 19 were operated upon after failure of conservative means. 24 of the patients were female and 17 male, with an average age of 52 years (min. 14.4 y; max. 71.2 y). According to Neers 's fracture classification of humeral head fractures we saw 14 type IV, 25 times a combination of type IV and V and in another 2 cases a type VI fracture. RESULTS: In group A (conservative) the Constant score showed on average 82.0 points for the injured and 95.3 points for the contralateral shoulder, the HSS score revealed 73.6 points and Neer's x-ray score 5.6 points. Group B (operated) showed also good results on average according to a Constant score of 72.1 points (fractured humerus) compared with 98.1 points of the contralateral shoulder. HSS score was 64.7 points. The radiological results reached 4.0 points. Group C (conservatively failed, secondary operation) achieved 68.2 points for the injured side and 95.8 points for the contralateral side according to Constant and 59.5 points according to HSS score. The x-ray evaluation showed 5.3 points. Fracture type did not influence the outcome in any of the groups. There was no humeral head necrosis in group A, one in group B (2.4 %) and four in group C (9.8 %). CONCLUSION: These data show that regarding to clinical and radiological long-term results also complex fractures of the humeral head should be treated by head preserving procedures.

Adolescent↗

[Primary hemiarthroplasty after complex fracture of the humeral head--functional late results].

UNLABELLED: Treatment of complex fractures of the humeral head remains an obviously unsolved problem. Under consideration of the problems of head preserving methods, the development of the last years tended towards the hemiprosthetic replacement. As the discussion about the methods and implants continues to be controversial, long-term results of Neer-II-replacement of humeral head in own trauma cases are presented here. PATIENTS AND METHODS: 46 patients were investigated, in whom a cemented Neer II hemiprosthesis was implanted between 1983 and 1996 due to complex fracture patterns. Median age was 60.2 years, 74 % of patients were female. 59 % had a luxation fracture type Neer VI, 22 % presented a concomitant nerval lesion. Follow up was performed 5 years on average after the operation. 38 patients were investigated clinically according the score of Constant and Murley, 36 had a x- ray control. Additionally an individual questionnaire was completed by 46 patients. RESULTS: Average Constant-score was 66.2 points, whereas in 76.3 % a satisfactory or better result was achieved. In 23.9 % the outcome was poor. In one patient (2.2 %) explantation of the hemiprosthesis and shoulder fusion due to pain was necessary. Conditions for a good result were a patient aged 50 years and younger (75.9 pts. versus 64.2 pts.), an early hemiprosthetic replacement within 4 weeks after the trauma (71.7 pts. versus 55.3 pts.) and a patient without an earlier operation and nerval lesion (76.8 pts. versus 53.9 pts.). No correlation was found between the date of the follow-up and the interval of time since the operation. CONCLUSION: After complex fractures of the humeral head satisfactory long-term results can be obtained by the cemented Neer II hemiprosthesis. Thus, implants of the newer generation can not yet whitness their superiority under consideration of functional aspects. Refixation and reintegration of both the tubercula after trauma still seems to be an unsolved problem and requires further development.

Adult↗

[Intramedullary abscess of the spinal cord--a rare pathology. Case report, therapeutic regimen and review of the literature].

Although the presence of an intramedullary abscess of the spinal cord is extremely rare, it is most important to be aware of its existence in the differential diagnosis of neurological diseases. Existing neurological deficits with progressive symptoms of paraplegia should always be regarded as suspect and a differential diagnosis of an intramedullary abscess of the spinal cord should then be included in the therapeutical regimen. A correct diagnosis using MR-tomography followed by an early surgical treatment strategy are essential for the affected patients, simply because an early diagnosis and an immediate operative intervention represent decisive prognostic factors independent from the cause of infection. Surgical intervention must include a decompressive laminectomy, a myelotomy, and also a secure intraoperative abscess drainage. In this analysis two patients will be reported on, both of whom were already showing symptoms of paraplegia at the time they were admitted to hospital. In both cases MR-tomographically an intramedullary nodulary lesion of the spinal cord could be detected. However, due to a complete lack of any acute symptoms of inflammatory reaction in one patient, an intramedullary abscess was not actually diagnosed before surgical treatment was performed. These two cases, together with existing scientific literature, aim to present an overview of the pathogenesis, the clinical symptomatology, the treatment strategy, and the expected therapeutical outcome of an intramedullary abscess formation. It will be shown that by treating this disease as early as possible using adequate therapeutic interventions a functional improvement of the resulting neurological symptoms can be expected.

Abscess↗

Superior efficacy in suppression of heterotopic bone formation using fractionated irradiation of 5 x 2 Gy compared to a single dose of 7 Gy. An experimental study in rats.

Postoperative irradiation of the operative field is an established method to prevent heterotopic ossification in total hip arthroplasty. In this study two theoretical dose-equivalent regimens of radiation therapy were compared. Allogenic bone matrix was implanted in both thighs of 50 adult male Wistar rats to induce heterotopic ossification. Immediately after operation the implants of 40 animals were irradiated using a single-dose of 7 Gy or 5 fractions of 2 Gy each. Ten rats served as a controlgroup and did not undergo irradiation. Radiation therapy with 5 x 2 Gy led to a highly significantly better suppression of heterotopic ossification than irradiation with 1 x 7 Gy (p < 0.001; paired-t-test). Single-dose irradiation reduced the mean calcium contents to 138.87 +/- 22.84 micrograms Ca2+/mg implanted bone matrix; fractionated irradiation obtained a reduction to 63.35 +/- 21.16 micrograms Ca2+/mg implanted bone matrix. In thigh implants not exposed to irradiation the mean calcium content was 191.50 +/- 11.46 micrograms Ca2+/mg implanted bone matrix. Radiographically better suppression of bone formation could be documented after irradiation with 5 x 2 Gy compared to 1 x 7 Gy and non-irradiated implants. The histological aspect of the explanted specimens showed quantitatively more new bone formation in the non-irradiated controls than in both irradiation groups. In view of experimentally demonstrated better effects, as well as the reduced side effects, fractionated irradiation appears preferable.

Animals↗

Arthrodesis of the shoulder after septic arthritis. Long-term results.

We analysed the long-term results of arthrodesis of the shoulder after infection in 15 patients. At the time of operation, 14 cultures were positive for Staphylococcus aureus. The mean follow-up was 8.3 years (3 to 14) and 90% of the patients were satisfied with the outcome. There were complications in five patients (33%); in three there was nonunion with loosening of the implant. One patient had a sound bony union but with a persistent sinus six years after arthrodesis and another had a sinus which healed after the metal was removed. Four of these five patients (80%) were heavy smokers (> 20 cigarettes/day). Cancellous bone grafting did not affect the incidence of complications. The mean age of the patients with complications was 58.6 v 48.6 years for those without (p = 0.2808; not significant). Those with complications had had more previous operations (6.4 v 2.5, p < 0.05). Antibiotics, as determined by the bacteriological cultures, were administered for six weeks. The complication rate was higher in patients with active sepsis but the younger the patient and the fewer number of previous operations (< 50 years, < four previous operations), the better was the outcome. Considering the rate of complications, we recommend early surgery in these patients.

Activities of Daily Living↗