PubMed HealthSearch

SEARCH · PubMed Health

Results for “Complication mechanisms”

Explore indexed PubMed citations for clinical trials, systematic reviews and public health research. Read source abstracts and follow each citation to its original PubMed record.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 19 recordsLinked to original sources

Successful correction of all mechanical complications of ischemic heart disease in the same patient.

Extensive surgery for all of the mechanical complications of ischemic heart disease is feasible with early diagnosis, catheterization, and aggressive medical and surgical therapy. A patient is report who, after recovering from cardiogenic shock, required a coronary bypass, closure of ventricular septal defects, mitral valve replacement, aneurysmectomy, and temporary pacemaker wires. The outcome was successful.

Aged

[Emergency treatment of mechanical complications of acute myocardial infarction. Septum perforations and mitral insufficiency].

Over the last three years, thanks on the one hand to improvements in surgical techniques and ressuscitation, and on the other to assisted circulation using the intra-aortic balloon, which allows improved preoperative preparation of the patients, urgent medicosurgical treatment of the mechanical complications of infarction has improved the prognosis by comparison with the recent past. During the above period, our figures for operative intervention during the first two weeks after an acute infarction have been as follows: 1. Twenty nine cases of septal perforation (17 of which had previously had assisted circulation by balloon): there were 8 immediate deaths and 8 successful cases (no secondary deaths over a follow-up period of from 2 to 41 months). In all these cases, the surgeon approached the perforation by way of the left ventricle. No patient required an additional bypass procedure. Where indicated, assisted circulation by means of a balloon should not be continued for more than a few days. If there is no improvement with its use, it seems unreasonable to proceed to surgery regardless. 2. Ten cases of acute mitral incompetence; 8 were due to ruptured papillary muscle and two to mal function. 5 patients out of the 10 had required circulatory assistance by balloon preoperatively. There were 2 immediate deaths and 8 successful cases, with one secondary death (follow-up period of between 2 and 37 months).

Acute Disease

Proteomics profiling of serum and liver in GSD Ia and Ib patients: insights into complication mechanisms and circulation biomarkers.

BACKGROUND: Glycogen Storage Disease (GSD) Types Ia and Ib are rare metabolic diseases caused by gene variants in G6PC1 and SLC37A4, respectively. Although life-threatening fasting hypoglycemia can be controlled by a strict diet, patients often suffer from multiple metabolic abnormalities and severe long-term complications. However, the underlying mechanisms remain incompletely understood, and there is a lack of effective monitoring biomarkers. Therefore, the aims of this study are to investigate the pathological mechanisms of the disease and disease complications in GSD I and identify potential protein biomarkers. METHODS: Comprehensive untargeted proteomics was performed on 18 GSD Ia and 8 GSD Ib sera samples from patients with 21 matched control sera, complemented by liver 3 GSD Ia samples and 1 GSD Ib sample from patient liver tissues, compared to 10 donor liver samples. RESULTS: We identified 415 proteins in total. Significantly changed (FDR&#x2009;<&#x2009;0.05) were observed in 158 (38%) proteins for GSD Ia vs Control, 116 (28%) for GSD Ib vs. Control, and 151 (36%) for GSD Ia vs. Ib. Pathway analysis revealed distinct alterations in serum/plasma, with 58, 32, and 29 significantly changed biological processes (FDR&#x2009;<&#x2009;0.05) in these three comparisons, respectively. The coagulation pathway was the most significantly changed one in the GSD Ia patients. Immune response-associated proteins, especially immunoglobulins, were increased in GSD Ib specifically. Proteins related to liver injury, cholesterol, and amyloidosis were altered in two subtypes, though more pronounced in GSD Ia. Potential biomarkers with significant alterations both in the circulation and in the liver tissue were identified specifically for monitoring GSD I subtypes and prognosing liver deterioration, namely APOC1 and CD5L to distinguish between GSD Ia and Ib and ALDOB for the presence of hepatocellular carcinoma (HCC) in GSD Ia patients. CONCLUSIONS: These findings provide new insights into the differences between the two GSD I subtypes and the pathogenesis of GSD I-related complications, as well as highlighting the potential of protein circulating biomarkers for monitoring complication progression in GSD I and assessing HCC risk in GSD Ia patients.

Humans

Pneumoperitoneum complicating mechanical ventilator therapy.

Subdiaphragmatic air arouses the clinical suspicion of a perforated intra-abdominal viscus. In patients with respiratory failure requiring mechanical ventilation, the retroperitoneal dissection of air from the mediastinum may give rise to radiologic evidence of subdiaphragmatic emphysema. The present report describes four patients with this syndrome. In three of them, a perforated gastric or duodenal ulcer was initially suspected. None of these three patients underwent surgery. Autopsy examinations in two patients revealed extraperitoneal subdiaphragmatic emphysema with secondary rupture into the free peritoneal cavity. The third patient had an uneventful recovery and was discharged from the hospital. In a fourth patient, signs of peritonitis prompted an exploratory laparotomy. No perforation of an intraperitoneal viscus was identified. Upper gastrointestinal contrast roentgenography and peritoneal lavage may help determine the etiology of subdiaphragmatic air in patients undergoing therapy with a mechanical ventilator.

Adolescent

[Functional state of the adrenal cortex in calculous cholecystitis complicated by mechanical jaundice in elederly patients].

The functional status of the adrenal cortex in 26 elderly patients suffering from calculous cholecystitis complicated with mechanical jaundice has been studied. The activation of the glucocorticoid function and the depression of the androgenic one have been found. These changes of hormonal balance were found at all the stages of surgical treatment; they were the most pronounced in case of a severe clinical course of the disease.

Adrenal Cortex

Clinical outcomes of zirconia dental restorations: A systematic review and meta-analysis.

OBJECTIVES: To evaluate the survival and success rates of zirconia dental restorations (ZDRs) and their complications. DATA & SOURCES: Electronic searches of PubMed, Cochrane, Embase and Web of Science were conducted up to January 1, 2026. Clinical studies with at least 1-year follow-up evaluating zirconia dental restorations in natural teeth were included. Survival rates, success rates, and biological and mechanical complications were analyzed. Risk of bias was assessed using RoB 2, Newcastle-Ottawa Scale (NOS), and Joanna Briggs Institute tools (JBI). Certainty of evidence was evaluated using the GRADE approach. STUDY SELECTION & RESULTS: Sixty-six studies published between 2008 and 2025 were included. Pooled survival rates ranged from 92.9% to 98.7% up to 10 years for single crowns (SCs), 77.6% over 10 to 13 years for fixed dental prostheses (FPDs), 97.4% for resin-bonded FPDs (RBFPDs) over 10 to 15 years, from 50.0% to 52.6% over 9 to 13 years for conventional cantilever FPDs (CFPDs) and 89.0% for inlay-retained FPDs (IRFPDs) over 10 years. Pooled success rates were 46.1% for SCs over 10 years, 40.1% for FDPs over 10 to 13 years, 84.3% for RBDPDs over 10 to 15 years, 12.5% to 22.6% for CFPDs over 9 to 13 years and 70.3% for IRFPDs over 10 years. Biological and mechanical complication rates were 12.1% and 53.9% for SCs at 10 years, 19.4% and 46.7% for FPDs over 10 to 13 years, 50.0% and 37.5% for CFPDs at 9 years, 21.4% and 14.3% for IRFPDs at 3 years, and 3.3% and 8.0% for RBFPDs over 10 to 15 years. Restorations treated with airborne-particle abrasion (APA) combined with 10-methacryloyloxydecyl dihydrogen phosphate (MDP) achieved favorable short-term clinical outcomes, with pooled survival and success rates of 98.6% and 97.7% for SCs, and 98.1% and 70.1% for IRFPDs, respectively. The included studies were assessed as having low to moderate risk of bias using RoB 2, NOS, and JBI tools, but GRADE assessment yielded evidence of very low certainty. CONCLUSIONS: ZDRs generally demonstrated acceptable to excellent short- to long-term survival and success outcomes. Mid- to long-term clinical performance was varied according to restoration types. The RBFPDs had relatively low complication rates, followed by the SCs, the FPDs and the IRFPDs. CFPDs exhibited relatively low success rates and high complication rates. The predominant biological complications were secondary caries and pulpitis or apical periodontitis, while chipping and debonding were the most common mechanical complications. APA treatment followed by application of MDP is capable of producing favorable short-term clinical outcomes. CLINICAL SIGNIFICANCE: ZDRs except for CFPDs could achieve favorable mid- to long-term clinical performance. CFPDs should be conducted with caution.

Zirconium

Section II: General orthopaedics. Anterior cervical fusion for trauma.

Anterior bone grafts of 24 injured cervical spines were reviewed with respect to early postoperative instability and eventual malunion. Spinal redislocation or graft extrusion occurred in 21% representing failure to attain early stability. In 38%, the late complication of kyphotic malunion occurred, averaging 21%. The Yale instability criteria were fulfilled in 15 cases and mechanical complications developed in 87% of these. When posterior instability was present, the mechanical complication rate rose to 92%. Early stabilization of most neck injuries is not achieved by the anterior bone graft and its use as a means of "stabilization" is unsubstantiated by clinical experience.

Adolescent

Pneumoperitoneum. A complication of mechanical ventilation.

Pneumoperitoneum occurred in three adults receiving mechanical ventilatory support. Since the presence of a perforated viscus could not be confirmed by combinations of clinical, surgical, or autopsy findings in any of these patients, it appears that the free abdominal air in these patients was a complication of the ventilatory therapy. It is possible that such a complication may be more common than is currently recognized and thus should be added to the differential diagnosis of pneumoperitoneum.

Adolescent

Clinical and hemodynamic results of intraortic balloon counterpulsation and surgery for cardiogenic shock.

Forty-two patients with cardiogenic shock (CS) secondary to myocardial infarction were treated with intra-aortic balloon pumping (I.A.B.P.). In 14 patients C.S. was associated with ventricular septal defect (V.S.D.) and in four with mitral regurgitation (M.R.) secondary to rupture of the posterior papillary muscle. All patients were resistant to conventional medical therapy. Shock was reversed in 20 of the 24 patients in C.S. without mechanical complications. After 24 to 48 hours of I.A.B.P., cardiax index (C.I.) increased from 1.38 to 2.00 L./min./M2, systolic arterial pressure (S.A.P.) from 83 to 96 mm. Hg, urinary output (U.O.) from 10 to 56 ml. per hour, and pulmonary wedge pressure (P.W.P.) decreased from 22 to 16 mm. Hg. Three patients treated with I.A.B.P. alone survived more than 1 year; of the 13 patients who were balloon dependent, four have undergone emergency surgical procedures and two were long-term survivors. In all patients with mechanical complications, I.A.B.P. resulted in significant clinical and hemodynamic improvement. P.W.P. decreased from 19 to 15 mm. Hg, and U.O. increased from 13 to 38 ml. per hour while S.A.P. remained unchanged. In patients with V.S.D. the pulmonary/systemic flow ratio (P/S) declined from 3.5 to 2.8; in patients with M.R., "V" wave amplitude decreased by 8 mm. Hg. Emergency surgery was performed in 10 patients with V.S.D. and in three patients with M.R. and there were eight long-term survivors (13 to 27 months). It is concluded that I.A.B.P. is an effective means of supporting the circulation in C.S. Of the 42 patients with C.S. treated by combining I.A.B.P. and emergency surgery, 13(31%) were long-term survivors (20 +/- 6 months).

Adult

Complication with mechanical stapling device in creation of ileoconduit.

Of 296 patients with pelvic malignancy and ileal urinary conduits, urinary tract calculi developed in 14. Calculi which ordinarily require surgical intervention because of their size may pass spontaneously in patients with ileoconduits because of the presence of a chronically dilated colllecting system and the surgical elimination of three of the four sites of stone impaction (pelvic brim, ureterovesical junction, and ureteral orifice). In 1 patient multiple calculi developed around the surgical staples used to create the proximal end of the ileal conduit. We recommend that autosuture with stapling devices not be used to create the proximal end of an ileal urinary conduit.

Carcinoma

Non-tobacco nicotine dependence and postoperative complications after total ankle arthroplasty: A propensity-matched cohort study.

BACKGROUND: The clinical impact of non-tobacco nicotine dependence (NTND) is poorly defined. This study evaluated the association between NTND and complications following total ankle arthroplasty (TAA). METHODS: A retrospective cohort study using the TriNetX Research Network was performed. Adults undergoing primary TAA (Current Procedural Terminology [CPT] 27702) between 2010 and 2025 were included. Patients were categorized into NTND (International Classification of Diseases, Tenth Revision [ICD-10]: F17, excluding tobacco-specific codes) and nonsmoker cohorts. Propensity score matching (1:1) yielded 939 NTND patients and 939 controls. Ninety-day medical and wound complications and &#x2265;&#x202f;2-year mechanical outcomes were assessed. RESULTS: NTND patients had higher rates of 90-day readmission (11.7% vs 6.5%; OR 1.9), wound disruption (4.3% vs 2.6%; OR 1.7), surgical site infection (3.1% vs 1.6%; OR 2.0), and sepsis (2.4% vs 1.1%; OR 2.3). At a minimum 2-year follow-up, NTND was not associated with increased risk of mechanical complications. CONCLUSION: These findings challenge the assumption that smokeless nicotine products are benign in the perioperative setting and support incorporating NTND screening and cessation counseling into preoperative optimization protocols. Future prospective studies are warranted to further characterize the dose-dependent effects of non-tobacco nicotine exposure and to evaluate the impact of perioperative cessation strategies on outcomes following TAA. LEVEL OF EVIDENCE: IV.

Humans

[Leg amputation with transposition of the plantar skin and calcaneous tuber in severe mechanical trauma complicated by shock].

Diaphyseal shin amputations with transposition of the plantar skin and calcanean tuber on the neurovascular bundle were performed upon 4 cases. The late results have been studied. The patients use prothesis with the support on the end of the stump, and walk without the walking-stick. The authors believe it possible to carry out such operations, under the conditions of a specialized medical institution, for severe injuries to the lower extremities complicated with shock after a thorough debridement of the wound.

Adult