-
Journal of Clinical Medicine Jan 2024This study investigates the possible toxic effects of the preoperative antiseptic substances povidone iodine (PVI) and polyhexanide (PHMB; Serasept 2) on wound healing...
This study investigates the possible toxic effects of the preoperative antiseptic substances povidone iodine (PVI) and polyhexanide (PHMB; Serasept 2) on wound healing in ophthalmology. To assess this impact, human telomerase-immortalized corneal epithelial (hTCEpi) cells and human telomerase-immortalized conjunctival epithelial (hCjE) cells were exposed to 1% and 5% PVI or 0.04% PHMB for different periods to evaluate the cytotoxicity of these two antiseptics. Furthermore, the toxicity of these antiseptics was investigated in a human tissue-specific corneal epithelial construct and porcine eye culture model. The results reveal the high cytotoxicity of PVI and PHMB in the hTCEpi and hCjE in monolayer cell culture models, independent of the incubation time and concentration of these substances. However, after hTCEpi cell differentiation into a tissue-specific corneal epithelial construct, contact with these antiseptics for the relevant preoperative time did not alter cPARP1 or Ki67 expression. Furthermore, the wound-healing process in the porcine cornea was not significantly influenced after incubation with these antiseptics. In summary, corneal and conjunctival epithelial cell lines are very sensitive to PVI and PHMB, whereas no significant alterations were found in intact tissue-specific corneal epithelial constructs or porcine corneas. Therefore, we could not identify PVI and PHMB as reasons for postoperative eye irritation.
PubMed: 38276094
DOI: 10.3390/jcm13020588 -
JBJS Essential Surgical Techniques 2023The Reconstructive Allograft Preparation by Toronto Sarcoma (RAPTORS) protocol is reliable and reproducible without substantially adding to the surgical reconstruction...
BACKGROUND
The Reconstructive Allograft Preparation by Toronto Sarcoma (RAPTORS) protocol is reliable and reproducible without substantially adding to the surgical reconstruction time or cost. Our technique includes clearance of debris, lavage of the medullary canal, pressurized filling of the medullary canal with antibiotic-laden cement for its mechanical and antimicrobial properties, and insertion of cancellous autograft at the allograft-host junctional ends prior to dual-plate compression to fix the allograft into the defect. Our experience with large intercalary allograft reconstruction has demonstrated high rates of long-term success and addresses the most common causes of large allograft failure (infection, fracture, and nonunion), as shown in our long-term outcome study.
DESCRIPTION
Once the tumor is resected, it is used as a template for cutting and shaping the allograft to fit the bone defect and to restore length and anatomy. The frozen allograft is thawed in a container with povidone iodine and bacitracin saline solution until it reaches room temperature. The allograft is size-matched, and clearance of its intramedullary marrow contents is performed with use of curets and intramedullary reamers. If 1 end of the allograft includes the metaphysis and is covered by dense cancellous bone, we try not to ream through this end because maintaining this metaphyseal cancellous surface will expedite bone healing. The segment is then thoroughly lavaged with "triple wash" solutions to clear out any remaining marrow contents and to ensure sterilization of the allograft. This serial-wash technique involves the use of 3 discrete antiseptic modalities and has been utilized at our institution with low rates of allograft infection. These antiseptic modalities include 10% weight-per-volume povidone iodine diluted 1:1 with normal saline solution, 3% weight-per-volume hydrogen peroxide diluted 1:1 with normal saline solution, and 50,000 units of sterile bacitracin lyophilized powder dissolved in 500 mL of normal saline solution. Following the triple wash, the medullary canal is filled with antibiotic-laden methylmethacrylate bone cement. If both ends are open, the far end of the segment is first plugged with the surgeon's finger or with gauze, or if 1 end is covered with cancellous bone, then retrograde filling of the canal with cement is performed from the open end. The cement is then pressurized to ensure complete filling of the intramedullary space. Before it sets, 1 cm of cement is removed from each open end of the allograft to allow for packing of autograft bone cancellous chips and to ensure that cement does not impede anatomic reduction of the allograft-host bone junction. For this step, cancellous autograft from the iliac crest is harvested with use of a separate sterile surgical setup in order to prevent contamination of the autograft site by instruments used for tumor resection. The cancellous autograft is packed into the space created after recessing the cement at the end(s) of the allograft and, using a bone tamp, the autograft is compressed into this cavity and into the corresponding end of the host long bone in order to improve the healing potential at the allograft-host bone junction(s). Finally, a dual compression plate construct is utilized for upper as well as lower-extremity reconstructions in most cases. The cement in the allograft must be completely hardened before drilling into it. The allograft-host bone junctions are sequentially compressed at both the proximal and distal ends to allow for maximal apposition of the osseous surfaces. Only 1 or 2 unicortical screws are placed into the allograft to hold it in place and to facilitate maximal compression at both bone junctions. Patient compliance during postoperative rehabilitation is essential to optimize healing and provide reliable and durable outcomes. Postoperative care following the RAPTORS technique includes limited early rehabilitation and long periods of non-weight-bearing until radiographic union is noted across both bone junctions, followed by gradual resumption of weight-bearing and more aggressive physiotherapy. See the Appendix for further details regarding each step of the procedure.
ALTERNATIVES
Intercalary reconstruction alternatives include various biological or endoprosthetic constructs. The other biological reconstruction options include the use of a free vascularized bone graft, distraction osteogenesis, combined vascularized fibula and allograft (i.e., the Capanna technique), or recycled tumor bones. Intercalary prostheses offer another reconstruction option for diaphyseal defects, but their feasibility is more limited in cases of periarticular segments with very short residual medullary canals. In such cases, there may be inadequate stem length for fixation, or the segment may require a custom implant that takes time to design and manufacture, which can be associated with high costs.
RATIONALE
Major factors limiting the widespread use of allografts include infection, graft fracture, graft nonunion, and, in some locations, availability. Our technique of allograft preparation with dual compression plating and triple-washing to provide mechanical and antimicrobial protection as well as augmented healing has shown reproducible results with low complication rates compared with the literature.
EXPECTED OUTCOMES
There have been high rates of long-term allograft survival (84.4%) following intercalary long-bone reconstruction at our institution, with lower complication rates than those presented in the literature.
IMPORTANT TIPS
Transverse osteotomies of the allograft, made perpendicular to the long axis of the diaphysis/anatomical axis, are important to replicate the resected host bone. Transverse osteotomies, while inherently less stable than step-cut ones, allow for adjusting the rotation of the allograft segment as needed for maximal contact and compression, as well as restoration of anatomical limb rotation.It is important to perform meticulous clearance of the intramedullary contents while preserving the endosteal bone and allograft integrity. We would utilize hand-reaming rather than a power drill device, in order to prevent overreaming or breaking through the allograft bone.Place as few unicortical screws as possible into the allograft-cement construct in order to maintain its structural strength and minimize potential sites for vascular ingrowth and bone resorption.
ACRONYMS & ABBREVIATIONS
K-wires = Kirschner wiresW/V = weight per volume.
PubMed: 38274144
DOI: 10.2106/JBJS.ST.22.00011 -
International Wound Journal Jan 2024Postoperative wound infections (PWIs), a subtype of surgical site infections, are a significant concern for patients undergoing caesarean sections (C-sections)....
Postoperative wound infections (PWIs), a subtype of surgical site infections, are a significant concern for patients undergoing caesarean sections (C-sections). Understanding risk factors and pathogen profiles can greatly assist in early diagnosis and effective treatment. This study aimed to identify risk factors and analyse the pathogenic landscape contributing to PWIs in C-sections. A nested case-control study was carried out, utilising stringent criteria for case selection and control matching. Diagnostic criteria for surgical site infections included both clinical and microbiological parameters. Risk variables examined included patient age, Body Mass Index, duration of surgery and several other clinical indicators. Microbiological analysis was performed using the BD Phoenix-100 Automated Bacterial Identification System. Statistical analyses were conducted using SPSS version 26.0, and risk factors were evaluated through both univariate and multivariate analyses. A total of 50 patients, aged between 20 and 45 years (mean age 26.3 ± 5.6), developed PWIs following C-sections. The study revealed a temporal distribution and various clinical indicators of PWIs, including elevated white blood cell count and C-reactive protein levels. Gram-negative bacteria were found to be more prevalent at 57.4%. Notable pathogens included Pseudomonas aeruginosa and Acinetobacter baumannii. Antimicrobial resistance patterns were also identified, highlighting the need for a targeted antibiotic approach. Increased infection risks were linked to lack of prophylactic antibiotics, absence of preoperative povidone-iodine antisepsis, operations over an hour, anaemia, amniotic fluid contamination, diabetes, GTI, premature rupture of membranes and white blood cells counts above 10 × 10 /L. The study provides critical insights into the risk factors and microbial agents contributing to PWIs following C-sections. Our findings emphasise the importance of early diagnosis through clinical and laboratory parameters, as well as the need for constant surveillance and reassessment of antibiotic stewardship programs.
Topics: Humans; Female; Pregnancy; Young Adult; Adult; Middle Aged; Surgical Wound Infection; Cesarean Section; Case-Control Studies; Povidone-Iodine; Anti-Bacterial Agents; Risk Factors
PubMed: 38272798
DOI: 10.1111/iwj.14609 -
International Journal of Molecular... Jan 2024Antimicrobial resistance (AMR) is a growing concern for the future of mankind. Common antibiotics fail in the treatment of microbial infections at an alarming rate....
Antimicrobial resistance (AMR) is a growing concern for the future of mankind. Common antibiotics fail in the treatment of microbial infections at an alarming rate. Morbidity and mortality rates increase, especially among immune-compromised populations. Medicinal plants and their essential oils, as well as iodine could be potential solutions against resistant pathogens. These natural antimicrobials abate microbial proliferation, especially in synergistic combinations. We performed a simple, one-pot synthesis to prepare our formulation with polyvinylpyrrolidone (PVP)-complexed iodine (I), L. (Thyme), and Miller (AV). SEM/EDS, UV-vis, Raman, FTIR, and XRD analyses verified the purity, composition, and morphology of AV-PVP-Thyme-I. We investigated the inhibitory action of the bio-formulation AV-PVP-Thyme-I against 10 selected reference pathogens on impregnated sterile discs, surgical sutures, cotton gauze bandages, surgical face masks, and KN95 masks. The antimicrobial properties of AV-PVP-Thyme-I were studied by disc diffusion methods and compared with those of the antibiotics gentamycin and nystatin. The results confirm AV-PVP-Thyme-I as a strong antifungal and antibacterial agent against the majority of the tested microorganisms with excellent results on cotton bandages and face masks. After storing AV-PVP-Thyme-I for 18 months, the inhibitory action was augmented compared to the fresh formulation. Consequently, we suggest AV-PVP-Thyme-I as an antimicrobial agent against wound infections and a spray-on contact killing agent.
Topics: Thymus Plant; Iodophors; Anti-Infective Agents; Anti-Bacterial Agents; Povidone-Iodine; Iodine; Gossypium; Polymers
PubMed: 38256211
DOI: 10.3390/ijms25021133 -
Veterinary Sciences Dec 2023Considering the increasing antibiotics resistance, there has been a propensity to replace them with antiseptics when it comes to wound management and treatment....
Considering the increasing antibiotics resistance, there has been a propensity to replace them with antiseptics when it comes to wound management and treatment. Nevertheless, in recent years, there have been reports regarding resistance to antiseptics by some bacterial strains. There is also concern about the environmental impact of these substances. The aim of this study was to compare the antimicrobial efficacy of antiseptics and eucalyptus essential oils on bacterial strains from horse's wounds. We used twelve , eight , two , one and one strains from equine wounds. The effect of essential oil, essential oil, povidone-iodine and chlorhexidine gluconate against the isolated strains was evaluated applying the Kirby-Baüer method. Regarding the strains, and the mixture of and had a better inhibitory effect than antiseptics. had a better effect against most spp. compared to . For both Gram-negative and Gram-positive strains tested, chlorhexidine gluconate had a better inhibitory effect than povidone-iodine. The antibacterial efficacy of essential oils highlights their potential to substitute or complement the use of antiseptics and so reduce resistance to antiseptics.
PubMed: 38250918
DOI: 10.3390/vetsci11010012 -
Cureus Dec 2023Introduction Oral and maxillofacial surgeons frequently perform the removal of impacted mandibular third molars. The success of this surgical intervention depends on...
Introduction Oral and maxillofacial surgeons frequently perform the removal of impacted mandibular third molars. The success of this surgical intervention depends on meticulous surgical technique and the use of appropriate irrigants to minimize complications in the postoperative period. Aim The aim of this study was to evaluate the efficacy of four different irrigation solutions (povidone-iodine, metronidazole, chlorhexidine gluconate (CHX), and normal saline) on postoperative sequelae like pain, trismus, swelling, and alveolar osteitis following surgical extraction of the impacted mandibular third molars. Materials and methods The current research was a randomized study carried out at Saveetha Dental College and Hospital in Chennai, India, from December 2022 to March 2023. The study population consisted of 112 participants who were referred to the Oral and Maxillofacial Surgery for the surgical removal of impacted mandibular third molars. The population was divided into four groups, with 28 in each group. They were categorized as A, B, C, and D based on the final irrigation solution used after surgical removal of the impacted teeth. In group A, patients received 0.5% povidone-iodine as the final irrigation solution; group B received 1% metronidazole; group C received 0.12% chlorhexidine gluconate (CHX); and group D received 0.9% normal saline. Patients were examined on the first and seventh postoperative days to assess pain, swelling, trismus, and alveolar osteitis. The results were analyzed with SPSS Statistics for Windows, Version 23.0 (Released 2015; IBM Corp., Armonk, New York, United States) software for Windows (Microsoft Corporation, Redmond, Washington, United States). A p-value less than 0.05 was considered statistically significant. Results Group B experienced significantly less pain than groups A, C, and D on the first and seventh postoperative days (p<0.05). The facial swelling was significantly less on the first and seventh postoperative day in group B compared to groups A, B, and D (p<0.05). There was no statistically significant variation observed in trismus (mouth opening) across the groups on both the first postoperative and seventh postoperative days. The presence of alveolar osteitis was seen in groups A, C, and D, but no instances were reported in group B. Conclusion It can be concluded that among the four irrigation solutions used in the lower third molar surgery, metronidazole irrigation solution yielded the best results in terms of less pain, swelling, and alveolar osteitis followed by chlorhexidine. There was no difference between povidone-iodine irrigation and normal saline irrigation on the postoperative sequelae. Postoperative trismus does not depend on the irrigation solution used in the third molar surgery.
PubMed: 38249289
DOI: 10.7759/cureus.50816 -
Cureus Dec 2023Surgical site infections (SSI) are commonly seen in surgical practice and are the main cause for concern in post-operative patients. There are many risk factors that...
Surgical site infections (SSI) are commonly seen in surgical practice and are the main cause for concern in post-operative patients. There are many risk factors that predispose to the development of SSI. However, the occurrence of SSI in patients undergoing elective class I and class II surgeries, which are considered clean surgeries with minimal contamination, is an important issue bothering the surgeons. SSI are also responsible for increased morbidity due to wound dehiscence, thus prolonging hospital stays and often leading to inconvenience to patients. We hereby present a study to highlight and address this important issue of SSI in our institute. All patients above 12 years of age who underwent elective class I and class II surgeries in the department of general surgery were included in this observational study. After surgery, local examination of the incision or wound site and grading of the SSI were done using the Southampton Wound Grading System (SWGS). Our results showed that 90% of the patients had normal healing, according to SWGS. We found that the incidence of SSI was lower in patients who underwent alternate-day dressing of their wound as compared to daily dressing. Another interesting finding was that the incidence of SSI was lower in patients in whom wound dressing was done with transparent film dressing as compared to povidone-iodine-guaze dressing. We concluded our study by finding that the incidence of SSI after elective class I and class II surgeries in our hospital was quite low, at 10%.
PubMed: 38249181
DOI: 10.7759/cureus.50844 -
Journal of General and Family Medicine Jan 2024We aimed to determine whether puncture sites for blood sampling and topical disinfectants are associated with rates of contaminated blood cultures in the emergency...
BACKGROUND
We aimed to determine whether puncture sites for blood sampling and topical disinfectants are associated with rates of contaminated blood cultures in the emergency department (ED) of a single institution.
METHODS
This single-center, ambidirectional cohort study of 548 consecutive patients ≥20 years of age was performed in the ED of a university hospital in Japan over a 13-month period. Pairs of blood samples were collected for aerobic and anaerobic cultures from patients in the ED. Physicians selected puncture sites and topical disinfectants according to their personal preference.
RESULTS
Potential contamination was identified in 110 of the 548 patients (20.1%). One hundred fourteen (20.8%) patients showed true-positive results for bacteremia, and 324 (59.1%) patients showed true-negative results. Multivariate analysis revealed more frequent contamination when puncture sites were disinfected with povidone-iodine (PVI) than with alcohol/chlorhexidine (ACHX) (adjusted risk difference, 19.1%; 95% confidence interval [CI]), 15.7-22.6; < 0.001). In terms of blood collection sites, femoral and central venous (CV) catheter with PVI disinfection showed more frequent contamination than venous sites with ACHX (adjusted risk differences: 26.6%, 95% CI 21.3-31.9, < 0.001 and 41.1%, 95% CI 22.2-59.9, < 0.001, respectively).
CONCLUSION
Rates of contaminated blood cultures were significantly higher when blood was collected from the CV catheter or femoral sites with PVI as the topical disinfectant.
PubMed: 38239999
DOI: 10.1002/jgf2.667 -
Orthopaedic Surgery Mar 2024Irrigation is a conventional treatment for acute and chronic periprosthetic joint infections (PJI). However, there has been no unified standard for irrigation during...
OBJECTIVE
Irrigation is a conventional treatment for acute and chronic periprosthetic joint infections (PJI). However, there has been no unified standard for irrigation during surgery for PJI in the past, and the efficacy is uncertain. The purpose of this study is to create a new irrigation protocol to enhance the infection control rate and reduce the postoperative recurrence rate of PJI patients.
METHODS
We conducted a single-institution retrospective review with a total of 56 patients who underwent revision total hip or knee arthroplasties due to PJI from January 2011 to January 2022. Conventional irrigation (CI) was used in 32 cases, and standard operating procedure of irrigation (SOPI) was used in 24. The CI protocol carries out an empirical irrigation after debridement, which is quite random. Our SOPI protocol clearly stipulates the soaking concentration and time of hydrogen peroxide and povidone-iodine. The irrigation is carried out three times, and tissue samples are taken from multiple parts before and after irrigation, which are sent for microbial culture. The important statistical indicators were the rate of positive microbiological culture and postoperative recurrence rate with an average follow-up of 24 average months.
RESULTS
The drainage volume was lower in the SOPI group than in the CI group on postoperative day 3 (p < 0.01) and 7 (p = 0.016). In addition, the percentage of positive microbiological cultures after the third irrigation was less than that before (p < 0.01) and after (p < 0.01) the first irrigation. The most common causative organism was Staphylococcus aureus, which was detected in 25.0% and 12.5% of the SOPI and CI groups, respectively. The failure rate at the final follow-up was 8.3% and 31.3% (p = 0.039) for the SOPI and CI groups, respectively.
CONCLUSION
Compared with the traditional CI method, SOPI standardized the soaking time of hydrogen peroxide and povidone-iodine, increased the frequency of and irrigation, and proved that microorganisms were almost completely removed through the microbial culture of multiple tissues. SOPI has the potential to become a standardized irrigation process worthy of promotion, effectively reducing the postoperative recurrence rate of PJI patients.
Topics: Humans; Prosthesis-Related Infections; Treatment Outcome; Povidone-Iodine; Hydrogen Peroxide; Arthroplasty, Replacement, Knee
PubMed: 38238252
DOI: 10.1111/os.13948 -
Interdisciplinary Cardiovascular and... Jan 2024A best evidence topic in thoracic surgery was written according to a structured protocol. The question addressed was 'For patients with malignant pleural effusion is...
A best evidence topic in thoracic surgery was written according to a structured protocol. The question addressed was 'For patients with malignant pleural effusion is chemical pleurodesis with povidone-iodine as effective, safe and well tolerated as talc pleurodesis for prevention of recurrent malignant pleural effusions?'. A total of 124 papers were found during the search, of which 8 represented the best evidence to answer the clinical question. The authors, journal, date, country of publication, patient group studied, study type, relevant outcomes and results of these papers were tabulated. At present, medical-grade talc is the most commonly used agent for chemical pleurodesis due to its high success rate, extensive history of clinical use and well-known side-effect profile. However, studies using povidone-iodine seek to establish it as a readily available,low-cost alternative to talc that can be easily administered through an intercostal catheter at the bedside. The summation of available evidence suggests that povidone-iodine is a safe, well-tolerated and equally efficacious agent for pleurodesis in the setting of malignant pleural effusion, when compared to talc.
PubMed: 38230708
DOI: 10.1093/icvts/ivad192